CA2014795A1 - Interactive room status/time information system - Google Patents

Abstract

INTERACTIVE ROOM STATUS/TIME INFORMATION SYSTEM

ABSTRACT OF THE DISCLOSURE
An interactive room status/time information system is pro-vided having a terminal associated with a television comprising a pro-cessor for processing data, an associated memory for storing opera-tion data and control algorithms, a keypad with remote control for inputting information, a character generator responsive to the pro-cessor for generating a multiple character, multiple line display, a power supply input, and a cable transmission link for communication at television frequencies with a system manager. A maid or inspector can send status information from a hotel/hospital room terminal over a cable television system to a system manager location. The status of a room for occupancy is determined by a two-step procedure. Input from both a maid and an inspector must be received before a room has a ready-for-occupancy status. Screens of compiled room status and historical data can be displayed at the system manager. Also, certain screens of room status data may be displayed on an associated television at the room terminal. Functions can be performed at the system manager location including searching stored status informa-tion for historical data of a particular room or maid. In accordance with a further time control feature of the present system, a hotel guest may actuate a wake-up mode of operation of a room terminal through a terminal keyboard or remote control. The system manager subsequently polls the terminal to determine if the room terminal is properly operating or if the wake-up alarm has been responded to. If not, hotel personnel may be dispatched to the room.

Description

[NTERACTIVE ROOM ST.~TUS/TI~vlE I~IFOR~IATION SYSTE~I

CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. Application Serial No. 289,218. filed December 23, 1988 and entitled "Automatic Interactive Tele~Asion Terminal Configurationl' and is related to U.S.
Application Serial Nos: , (Attorney Docket .\~o. 25,~71), entitled IlCable Television Transaction Terminal";
(Attorney Docket .~lo. 25.8?5). entitled "Storage Control lMethod and Apparatus for an Interactive Television Terminal"; _ _, (Attorney Docket No. 25,872), entitled "Terminal Authorization Method"; , (Attorney Docket No. 25,87?), entitled ~'Inter-active Television Terminal with Programmable Background Audio or Video"; and , (Attorney Docket ~o. 25,8?4). entitled ~Terminal Polling Method" filed concurrently herewith.
BACKGROUND OF THE lNVENTION
1. Technical Field This invention primarily relates to the field of two-way inter-active hotel/hospital systems typically provided over cable facilities and, more particularly, relates to a method and apparatus for room status, for timekeeping and for wake-up communications - 2 - 2~

2. D~;cription of the Relevant Art Two-way interactive cable television systems are known for transmitting entertainment. information and data signals over a cable facility toward a plurality of users. Data may be transmitted and addressed to a particular subscriber over a separate data channel or a so-called "in-band" data channel. In a downstream direction, address control data may represent services authorized to a particular ter-minal or control commands to that terminal. In an upstream direc-tion, from a terminal tO the service provider or system manager loca-tion, control data may represent selections made by a user in response to a polling request or at the time of user selection.
Terminals are often manufactured with stored unique identifi-cation numbers which may be unknown to a user for security pur-poses. ~Tevertheless, the unique identification number is necessary for the system manager to enter a terminal into a system along with location related information and configuration information.
Interactive terminals generally have been equipped without the capability of locally generating a display such as alphanumeric char-acters on an associated television receiver. .~ terminal-provided dis-play such as a liquid crystal display of a selected channel number at a terminal is inadequate for providing an effective man-machine inter-face for accomplishing a complicated task.
Keys normally provided at interactive terminals comprise a complement of numeric input keys, channel increment keys, volume control keys, a power button and a 'buy" key. However, these keys 3 ~ 7~

are inappropriately labeled and may confuse the user if simultaneously employed for other uses.
An addressable C.~TV converter with a graphics display genera-tor to generate signals for the presentation of text on a television screen is described in U.S. Patent No. 4.536,791, specifically incorpo-rated herein by reference. Although this patent increases the display capability of an addressable converter, it does not expand the interac-tive functions of the cGnverter.
It is also known in the art of non-interactive cable television terminals having a programmable read only memory to enable remote programming of the terminal. Remote programming is enabled via inputting a special code not provided with the standard remote con-trol transmitter associated with the terminal. According to U.S. Pat-ent ~lo. ~,792,9~2, which issued December 20, 1988, entitled "Remote Programming Of A CATV Channel Authorization Unit" and incorpo-rated herein by reference, an installer employs a special programming unit equipped with, for example, an infrared transmitter to remotely program the read only memory of a so-called "plain Jane~' converter, which is not addressable over a communications linl~ by a system man-ager, nor is the converter capable of return transmissions. Via the special code, access is obtained to the read only memory into which memory is load premium channels and services authorization data.
The converter is not equipped with a character generator and has no capability to locally generate character screens for display on an associated television receiver. All activities are controlled from the special code transmitting remote programming unit.

Systerr.s for communicating room status information of build-ings are known in the art. For eYample, U.S. Patent l~o. 3,6~5,204, describes a system for monitoring the status of hotel rooms by com-municating information at low frequencies over a twisted pair, pref-erably connected directly to telephone lines in a hotel. ~laids and inspectors can determine whether a room is clean or dirty on termi-nals placed throughout the hotel. Transmitting terminals are located in closets. The maids enter room numbers and an "occupied" or ~vacant~ status at the terminals. ~ main display panel displays the status of rooms once collected for display.
British Patent Specification 1,~36,53~, published December 20, 19~8, disccribes a computer-based hotel management system. Room status information such as vacant, vacant and out-of-service, cleaned, not cleaned, being cleaned, and ready for inspection are possible.
Insertion or removal of a maid or housekeeper's key into a hard wired switch causes the status of a room to change. ~lorning call capability is also disclosed via an alarm buzzer connected to a refrigerated drink storage unit provided in a hotel room. A morning call request is entered into the system at a porter~s keyboard/printer. When a cancel button in the room is depressed, the central computer is informed and the alarm is cancelled. If a guest does not respond within five min-utes, a warning message is printed on the porter's terminal and the call is automatically cancelled.
The above systems all require specialized wiring and hardware for communication. Furthermore, they do not provide for direct com-munication from each room. Communication for room status and 21~ 7~
_ J _ morning call capabilities is difficult because of the limited input/out-put capabilities of the hardware. In these prior systems, a limited display capability, if any, is used at each room. The addition of a more capable display to such existing systems would be very costly.
Furthermore, these prior systems require added installation e~pense for connection of twisted pairs to telephone lines or for connection of hard wires to a central computer. These prior systems are not capa-ble of communicating over e~isting communication mediums using little if any additional hardware; they require the addition of costly input/output switches and displays.
U.S. Patent ~lo. 3,81~,862 describes a hotel room status infor-mation system. Portable units are connected to a telephone network to send room status data to a hotel manager or to a housekeeper dis-play. Transmission of status data via a television antenna cable is discussed as a possible alternative to the particularly disclosed trans-mission by telephone line using audio frequency signals.
U.S. Patent ~os. 3,944,~42 and 4,360,828, discuss a hotel com-munication system for transmission of data from a plurality of trans-mitters over a master antenna television system (MATV). Transmis-sion of maid status data over an antenna television system is sug-gested, yet specific details of what the data comprise or how to gather this maid status information are not explained.
There remains a need in the art for a room status/time infor-mation system for communicating from hotel rooms with little if any additional hardware over an existing communica~ion medium having - 6 - 2~

low cos~, high capability input/output and a low cost, high capability display.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an interac-tive room terminal capable of being configured for specialized functions.
It is a further object of the present invention to provide an interactive terminal for communication over a building's cable televi-sion system.
It is a further object of the present invention to provide an interactive terminal with an alphanumeric display on an associated television screen.
It is a further object of the present invention to provide a room communication system for communicating with little or no additional hardware over an e~isting communication medium.
It is a further object of the present invention to provide a room communication system having a configurable input keyboard with remote control using little if any additional hardware.
It is a still further object of the present invention to provide a room communication system having a prograrnmable multiple charac-ter, multiple line display using little if any additional hardware.
~ t is a further object of the present invention to provide an interactive terminal capable of communicating room status information.

It is a further object of the present invention to provide a room status system capabie of sorting historical data on the status of rooms or the activities of a maid.
It is a further object of the present invention to provide a room status system capable of input by a maid supervisor/room inspector.
[t is a further object of the present invention to provide a room status system capable of performing maid or supervisor timekeeping f unctions.
It is a further object of the present invention to provide a sys-tem for communicating time information between a system manager and a plurality of room terminals.
It is a further object of the present invention to provide a time correction feature for sending time correction signals from a system manager to room terminals in the event of a power failure.
It is a further object of the present invention tO provide an interactive terminal for sounding a wake-up or other alarm at a pre-determined time.
It is a further object of the present invention to provide a multi-room wake-up system wherein wake-up can be ordered at a room terminal.
It is a further object of the present invention to provide a multi-room wake-up system capable of tabulating requested wake-ups at a system manager.
lt is a further object of the present invention to provide a multi-room wake-up system capable of indicating the tabulation of rooms not responding to a wake-up alarm.

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It is a further object of the present invention to provide a multi-room wake-up system capable of indicating the need for a man-ual wake-up call prior to the time of a scheduled wake-up call in the event of an inoperative room terminal.
The problems and related deficiencies of the prior art are solved by the principles of the present invention. an interactive room status/time information system having a terminal associated with a television comprising a processor for processing data, an associated memory for storing operation data and for storing control algorithms, a keypad with remote control for inputting information, a two-way cable television transceiver, a character generator responsive to the processor for generating a multiple character, multiple line display on the associated television, and a power supply input, the cable televi-sion transceiver for two-way communication at cable television fre-quencies with a system manager.
A maid or inspector (maid's supervisor) sends status informa-tion f rom the terminal over a cable transmission link to a system manager location, at which location, the time of data reporting rnay be stored in memory. At the system manager, room status informa-tion such as occupied/vacant and dirtyiclean can be tabulated and displayed for all the rooms in the hotel. Also, for example, timekeep-ing data and identification of a particular maid presently making up a room or identifi~ation of a room which is out-of-service can also be displayed.
The status of a room for occupancy is determined by a two-step procedure. First, an input from a maid must be received before a -9- ~

room can have a clean status. Second, an input from an inspector (maid~s supervisor) must be received before a room can have a ready-for-occupancy status.
Also, custom screens are displayed at the system manager or alternatively at the room terminal, including, for example, maid and inspector sign-on screens, maid and inspector data-input screens, rooms-to-be-made-up screens, rooms-to-be-inspected screens, room-status display screens or the like. Furthermore, other displays and functions can be performed at the system manager location including, for example, searching and short-term storage of status information, long-term storage on disk of status information and searching stored status information for historical data of the status of a particular room or the activities of a particular maid. These advanced capabili-ties allow features such as finding the location of a maid at any given time or displaying a sorted list of rooms to be inspected, occupied or the like.
A hotel guest may actuate a wake-up mode of operation of a room terminal through a terminal keyboard or remote control. First, a user selects a wake-up service screen and enters the exact wake-up time. The terminal then associates the terminal with the room num-ber and stores the time for wake-up. At the appointed time for wake-up, the terminal activates a piezoelectric alarm to wake the guest.
The system manager periodically, for example, every minute updates the accurate time reported by a clock of the terminal. Consequently, the time reported by the terminal is corrected automatically in the event of a power outage.

The system manager periodically polls the terminal to obtain the user entered time and room number. The system manager subse-quently polls the terminal at the appointed time to determine if the wake-up alarm has been responded to. If not, hotel personnel may be dispatched by the system manager to the room to determine if, for e.Yample, the hotel guest is a heavy sleeper or has had a heart attack.
As an additional feature, the system manager determines if the room terminal is out of order within a predetermined number of minutes prior to a scheduled wake up time. If the terminal is in fact out of order, the system manager may actuate a warning alarm to dispatch hotel personnel to wake the hotel guest.
The present invention improves upon the prior room status communication and wake-up techniques. Communication is inte-grated into an existent communication medium between each hotel/
hospital room and a central location, i.e., where the system manager may be located. Little if any additional hardware is required for con-nection to the chosen communication medium or for input/output and display with a user. A programmable multi-line, multi-character dis-play is also provided at no additional cost. Also the keys on a room terminal or, alternatively, on a remote control are inc3ividually configurable to particular functions.
These an~ other features of the present invention will become evident from the following detailed description of the invention when read in conjunction with the appended drawings.

BRIEF DESCRlPTION OF THE DRAWINGS
Figure 1 is a block schematic diagram of an interactive room status/time information svstem in accordance with the present invention.
Figure 2 is a block schematic diagram of a two-way interactive terminal according to the present invention comprising a micropro-cessor, a memory, a character generator, a keypad, and a television signal output to an associated television receiver.
Figure 3 is an exemplary screen for display at the system man-ager. This screen is exemplary of a tabulation of rooms and their status. A menu of commands is also included in the exemplary screen.
Figure 4 is another exemplary screen illustrating the menu of sort commands when the sort option is selected from the menu of Figure 3.
Figure 5 is another exemplary screen illustrating the tabulation of rooms and their status sorted by dirty/occupied.
Figure 6 is another exemplary screen of the change ID optio~.
Figure 7 is another exemplary screen of the display ID option.
Figure 8 is another exemplary screen of an initial menu.
Figure 9 exemplifies a display used for maid timekeeping.
Figures 10(a)-10(c) are screens exemplary of maid sign-on and room cleaning functions generated for display on a television receiver associated with a room terminal according to Figure 2.
Figures ll(a)-ll(k) are other screens exemplary of inspector sign-on and room inspection functions including display of rooms to be inspected and for logging the inspection of a range of rooms - 12~

generated for display on a television receiver associated with a room terminal according ~o Figure 2.
Figure 12 is an e~emplary screen for display at the system manager of selected wake-up times for particular rooms.
Figure 13 is another e~emplary screen for display at the system manager of wake-up alarm configuration parameters.
Figures 14(a) and 14(b) are screens exemplary of a wake-up request sequence generated for display on a television receiver asso-ciated with a room terminal according to Figure 2.
DETAILED DESCRIPTION OF THE INVENTION
Referring to Figure 1, there is shown a block schematic dia-gram of an interactive room status/time information system in accor-dance with the present invention. The depicted embodiment relates to its application in a hotel or hospital system environment; however, the present invention is not so limited. The present invention may also be applied in any two-way interactive system such as a cable or satellite television entertainment system involving a distribution net-work comprising trunk lines and feeder cables of optical or coaxial cable. For example, satellite receiver and decoder 3, cable receiver and descrambler 4, video modulator 5, addressable transmitter receiver 10, locally generated video modulator 11, and system man-ager 12 may all be located at the location of a cable television system headend. Besides the use of the above-mentioned equipment at the headend of a city-wide cable television distribution system, the above-mentioned equipment can be used, for example, at a central location at a hotel, hospital. cruise ship, office building, apartment - 13 ~

comple~, airport. factory, prison, univeristy, or any other similar facility. In this example, coaxial cable or optical fiber link 6 can con-nect the cable television headend to two-way interactive ~erminals "
8 or 9 of the entertainment system located at individual subscriber premises.
On the other hand. the embodiment of Figure 1 is especially exemplary of the application of the present invention in a hotel or hospital system. Transmission link 6, then, may simply comprise a coaxial or optical fiber cable link between a control center and ~1 terminals, for e~ample. terminals 7, 8 or 9 located in rooms of the facility. The terminals can be located at various locations throughout a facility such as a hotel room, a hospital room, a ballroom, a confer-ence room. a clerk inspector or o~her individual's office, a broom closet, a laundry room, a casino. a break room, a nurse station, a front desk, a message center, a lecture hall, a lounge, a dorm room, a work station, a laboratory, a guard desk, a prison eell or any other similar location in a facility. ~any uses are possible for the room terminal besides room status. timekeeping and wake up. The room terminal can be used for ordering room service, for checkout, for video conferencing, for premium program selection, for shopping, for bulle-tin board information, for airline reservations, for gambling and gam-ing or any other service used in a facility. Further details of room service and room checkout services are incorporated herein by refer-ence to U.S. Application Serial ~o. (Attorney Docket No.
25,871) entitled l'Cable Television Transaction Terminal." Further details of video conferencing and premium program selection are incorporated herein by reference to U.S. Application Serial No. (Attorney Docket ~lo. 25,8~2) entitled "Terminal Authorization Method.~
In particular, at the control center, a satellite signal may be received at satellite antenna 2 and then received and decoded at sat-ellite receiver decoder 3 for distribution via modulator 5 over a distri-bution cable 6 to the interactive terminals 7, 8 or 9 of the present invention. Also, in accordance with the present invention, the satel-lite signal may comprise a signal continuously indicating the accurate time. Additionally, a band of cable television channels received over cable facilities 1 are received and, if necessary, descrambled at cable receiver/descrambler 4. The descrambled video signals are then mod-ulated at modulator 5 for distribution over facilities 6 to interactive terminals ~, 8 or 9. If desired, an optional scrambler may be provided for scrambling premium channel transmissions to interactive termi-nals 7, 8, or 9. Of course, terminals 7, 8. or 9 then would comprise descrambler circuitry capable of descrambling the scrambled pre-mium channel transmissions. Such circuitry is not shown in either Figure 1 or 2 but would be preferable in a system involving distribu-tion of signals to remote subscriber locations.
According to the exemplary embodiment of Figure 1, the hotel or hospital location may be connected to other hotels or hospitals ~ria data link 14. Over data link 14, data may be received via modem 13 at system manager 12. In this manner, the hotel or hospital system manager may maintain current status of all features and all interac-tive terminals of an a system comprising a plurality of hotels. For - 15 ~ 7~. ~

example, entertainment schedules, room status data or wake-up infor-mation may be distributed over the data transmission link from a net-work control center where the entertainment schedule is composed.
System manager 12 comprises a data processing unit and appropriate memory ~`or storing status and fea~ures associated with all terminals in the system. System manager 12 also controls the generation of video channels at modulator 11, if necessary, for transmission over facility 6 to the two-way interactive terminals 7, 8 or 9. In particu-lar, modulator 11 comprises the capability to generate signals for actuating the display of character screens at terminal locations responsive to the control of the system manager 12 in the event, for example, that terminals are unable to generate the character screens themselves.
The generation of complete screens of characters for transmis-sion to a terminal according to the present invention for display is not required because the terminal (Figure 2) comprises its own character generator 204. Consequently, locally generated video modulator 11 is optional. Instead, system manager 12 generates commands to gener-ate screens, and not the screens themselves, for transmission via addressable transmitter 10 to an interactive terminal according to the present invention. In a l~hybrid" system comprising terminals having no character generator and terminals according to the present inven-tion, locally generated video modulator 11 would be necessary. The screens generated either at the terminal or by way of modulator 11, for example, may relate to the provision of information to guests or patients about hotel or hospital services, respectively.

Also according to Figure 1, system manager 12 controls an addressable transmitter/receiver 10 for transmitting addressed com-munications which are uniquely addressed to terminals 7, 8 or 9 and receiving communications at random times or in response to polling requests of terminals. The addressable transmitter 10 according to Figure 1 may transmit addressed information on a separate data car-rier, for example, at 108 megahertz and receive information trans-mitted in a so-called upstream direction from the terminals on another separate data channel at 25 megahertz. In an alternative embodiment, all downstream communications may be transmitted in band or within a particular television channel transmission, for exam-ple, within the horizontal or vertical intervals of transmitted video signals. Consequently, the system manager 12 accomplishes in band signaling by controlling data input into the video signals transmitted via either modulators S or 11 (not shown). A separate data carrier for each direction of transmission may be preferred due to the increased data carrying capacity. For upstream transmission, a ~elephone line or spread spectrum transmission may be employed as an alternative to a separate data channel.
Besides specifically addressed data communications with inter-active terminals 7, 8 or 9, system manager 12 may also communicate with billing computer (Property Management System) 20. ln a hotel, for example, the billing computer may be used at the front desk for check-in and che~k-out of guests and for reservations. Wake-up alarms, or other warning alarms sounded by system manager 12 can be sent to billing computer 20. System data can also be displayed on 2~47~

monitor 15 or printed on printer 18. System data can also be perma-nently stored on disk 1~. System manager 12 may also address communications globally to all interacrive terminals which communi-cations may or may not require a terminal to respond. Such global communications. for example, may be addressed to a global address representing all terminals in the particular hotel system or to a group address representing a group of terrninals within the system having a commonality of interest.
Each room terminal can be addressed using long addresses.
short addresses, global addresses and group addresses. Each room terminal preferably has a uni~ue 23 bit long address prese~ at the fac-tory and stored in non-volatile memory. This address will always be recognized by the room terminal. To minimize communications over-head, a 12 bit short address may be configured by the system manager.
The short address would be treated identically to the long address.
This address would be unique to a particular building site. ~ll room terminals are programmed to recognize a special global address to aid in sending system-wide commands. Normally, no response is given the command sent to a global address. An internal flag will be set to indi-cate that a global command has been received. This flag may be used by the system manager to verify receipt of global configuration com-mands. In order to maximize system performance, a group address may be implemented. This would speed the sending of data to groups of room terminals that are to be configured identically. This address would be handled by the room terminal as a second global address. It 2~7.~

would be dynarnically assigned by the system manager and be trans-parent to the system operator.
Each room terminal will communicate with the sys~em man-ager using a polling protocol. Preferably, the room terminals are con-figured as slaves to the system manager. Each room terminal responds to commands sent by the system manager. .~ normal polling cycle causes a room terminal to report its current operating mode including its current channel or screen. This allows the gathering of channel statistics by the system manager. ~dditional information returned may include request by the room terminal for data resident in the system manager or information regarding commands initiated by keys pressed at the room terminal. The room terminal will also indicate upon polling by the system manager of a change in a normally monitored item such as that at the serial port. Besides normal polling cycles, additional information is available from the system manager on a request basis, including screen and configuration dumps. The polling communication between the room terminals and the system manager occurs on signals modulated at cable television frequencies such as EIA (Electronic Industries Association) television frequencies and other standard cable television frequencies. Further details are incorporated by reference to U.S. Application Serial ,!~o~
(Attorney Docket No. 25,874) entitled "Terminal Polling Method.~
Either the user of a terminal or an installer may configure and install their terminal themselves. Interactive terminals 7, 8 or 9 are, consequently, equipped with means for enabling automatic installa-tion. Further details of automatic terminal configuration are 79 ~

provided in copending parent application Serial ,~,'o. 289,218 incorpo-rated herein by reference.
Referring to Figure 2, there is shown a two-way interactive terminal according to the present invention. The terminal is coupled via facility 6 to video modulator 5, addressable transmitter/receiver 10, and locally generated video modulator ll. if provided, as shown in Figure 1.
In parlicular, a two-way interactive terminal according to the present invention comprises an up/down converter 201 for converting channels received over the facility 6 for display at an associated tele-vision receiver (not shown) or for transmitting data modulated to 25 megahertz by data transmitter 203 for transmission over facility 6.
Up/down converter 201 passes data on the separate data carrier at 108 megahertz for demodulation and reception at data receiver 203.
Received television entertainmen~ signals are provided by up/down converter 201 to demodulator 202 which also provides automatic fre-quency control and gain control of up/down converter 201.
Demodulator 202 provides video via on screen character generator 204 to channel 3/4 modulator 205. In this manner, on screen charac-ter generation may appear superimposed upon an incoming video sig-nal or displayed in the form of a teletext screen, for example, text on a plain colored background. Also at demodulator 202 the baseband audio channel is transmitted to audio output 211 or via channel modu-lator 205 to the television receiver at radio frequency. In addition, a baseband video output 213 may be provided from on screen character generator 204 at ~rideo output jack 213.

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The interactive terminal of the present invention further com-prises a processor 206 for controlling data transmission and reception at data receiver/transmitter 203. Processor 206 also controls charac-ter generation at character generator 204 via gate array 207. Also via gate array 207, the processor 206 controls a key pad 216 which may be directly coupled tO the gate array or coupled via infrared or other remote control transmission link receiver 208. Random access memory (RAM) 217, provided with backup power by capacitor 218, stores character screen commands, downloaded feature data and other data received over the data transmission link via data receiver 203 from the system manager responsive to processor 206 control.
The processor 206 also has access to a nonvolatile random access memory 222 and access via gate array 207 to an outboard read only memory (ROM) 219. Processor 206 receives remote control key com-mands from a remote control key pad via infrared or other remote control transmission receiver 208. Processor 206 may also control the operation of a phase lock loop 209 and bandpass îilter 210 for control-ling operation of up/down converter 201.
Power is supplied via an alternating current input to power supply 215 which provides, for example, a plus 5 volt and a plus 12 volt D~ input to various components of the terminal requiring such power. Furthermore, the alternating current power input to power supply 215 may be provided via a controlled switched outlet 2L4 to an associated device such as the television receiver associated with the terminal. The state of switched outlet 214 is controlled via gate array 207 by processor 206. For e~cample, switched outlet 214 may t continuously provide power to its associated device or provide power only when an "on" button of key pad 216 or a remote control key pad is set to an on conditiorl.
Values inside of boxes or associated with boxes are exemplary of memory sizes, clock rates, or component types. For example, clock 220 for clocking the microprocessor operation may operate at 14.318 megahertz. The clock signal is divided down by gate array 207 for operation of microprocessor 206 which may be a Motorola ~IC
6803U4 or for clocking other processes of the terminal. The on screen character generator 204, for example, may be a Mitsubishi M50~55 component. RAM 217 may comprise 16 kilobytes of memory and ROM 219 comprise 32 kilobytes of memory respectively.
Figure 2 also illustrates wake-up alarm 230 preferably a piezoelectric beeper. Other types of audible alarms may be used. In addition to character generation and screen display, LEDs 221 may, for example, indicate at least a power on condition or, additionally, an alternative display of tuned channel number or other data which may be displayed on a screen.
System manager 12 connects to monitor 18 and keyboard 19 for interface with the user or system operator. A printer 18 can also be used at system manager 12. A disk 17 at system manager 12 is used for long term storage of data. ~ billing computer 20 can be used to collect billing information. Billing computer 20 may also be known as a property management system. For instance, billing cornputer 20 could be a hotells reservation system run by the clerk at the front desk. Check-in and check-out data could then be combined and ~ J

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compared with room status information gathered at the room termi-naLs. ~nconsistent check-in/vacancy information between the systems can be discovered and so corrected. Furthermore. more complete rocm status information can be tabulated.
Once the user of a room terminal applies power to power sup-ply 215 of Figure 2, processor 206 begins the task of initialization of various types of components of the terminal of Figure 2. Processor 206 shows proper operation and communication in control of compo-nents of the terminal such as data transmitter and receiver 203, gate array 207, on screen generator 204, keypad 206 and infrared remote control receiver 208. Self-inflicted diagnostic routines well known in the art to verify proper software operation may be performed at pro-cessor 206. Processor 206 may also enter an optional manufacturing or factory testing mode~ It may also enter a maintenance or display RAM mode of operation activated by the depression of a predeter-mined key of keyboard 216 or receipt of data entered via remote con-trol receiver 208.
Upon power u2 of the room terminal, when a reset command is received from the system manager, the room terminal will go through a series of tests. The RAM and ROM memory and the watchdog will be exercised to ensure proper operation. Any problems detected will be reported by the room terminal to the system manager if possible.
In order to protect data stored in the RAM memory, the RAM test will be non-destructive. Particular commands will also allow the e~ercis-ing of specific hardware functions to enable thorough factory testing.

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Specific tests may include test of the video generator, system RAM, the alarm. the keyboard. the data ~ransmitter, and other hardware.
The present invention allows predetermined configurations of a limited number keys on keypad 216, for example, seventeen different keys or a infrared remote control 208. A key template is stored in terminal memory ~or each display to be generated. The template defines an operation for particular keys associated with a display. For example, various displays are illustrated which result in the genera-tion of different displays in response to the actuation of particular keys. In response to Figure 11(c), the actuation of key "1" generates the display of Figure ll(e~ and the actuation of key "2" generates the display of Figure ll(d). In such a fashion, any key can be configured for any function. For example, the "OK" key and the "BU~" key are configured for "if correct" and "to retry", respectively, in Figure ll(g). Therefore, by assigning new functions to existing keys "CH+", "CH-", "Vol+", "Vol-", "BUY", etc., the present invention permits pro-grammable assignment of functions to keys which may have little or no relationship to key labelling. Furthermore, by reinforcing the assigned key function by means of screen display, a user may feel comfortable with their selection of particular key for performing a non-indicated function. In other words, the combination of screen display and programmable keys creates a human friendly interface between the user or the installer and the terminal.
Room status or wake-up communication from a room terminal can be selected by tuning the room terminal to a particular channel number that corresponds to a desired data screen. When the 7~
- 2~ -particular channel corresponding tO the desired data screen is selected, normal tuner output is disabled and the text generating cir-cuitry of character generator 209is activated. A first screen of text is then displayed on the television receiver associated with the room terminal for the selected service such as wake-up.
In addition to the interactive modes described, an option e~ists for a mode allowing data entry even when the room terminal is in the ~power off" state. This will allow maid status entry, for example, without requiring a maid to turn on an associated television. When a room terminal is "off" a power LED will be off, switched outlet 21g may be turned off. and the tuner will be tuned to the l'off'' channel.
Upon power up, switched outlet 214 will be switched "on" and the room terminal will be tuned to a predetermined channel or text screen. Switched outlet 214 can be configured either to be always on or to switch off when the room terminal is turned "off". The power-up channel can also be programmed as a configurable parameter by the system manager.
When a data screen is active, the terminal, under the control of processor 203 is capable of selecting an audio or video channel or both from up-down converter 201. This audio/video channel can then complement the character generated display. Thus, music can be added to screens or even movie audio inserted over the screens. If no channel is specified for the audio, the volume control circuit of demodulator 202is set to its minimum level. The volume control cir-cuit of demodulator 202 Will, however, remember the previous vol-ume level and return to the previous volume level the next time an - 25 - ~O~L~7~

audio output is needed. Further details are incorporated herein by reference to U.S. Application Serial ~o. (Attorney Docket ,Yo. 25,877) entitled "Interactive Television Terminal with Program-mable Background Audio or Video."
Processor 203 can control the audio volume control circuitry when requested by use of the volume up key, the volume down key and the mute key. Preferably, volume up and volume down will e~Yhibit a total of 64 different levels. When one of these keys is pressed, the request will be repeated at a rate of about 100 msec. until the key is released. There will be an initial delay of about 500 msec. after th'e first step before the 100 msec. repeat has begun. Other rates and delays are within the purview of those of skill in the art. ~lute will cause the volume to go down to the lowest level, but the previous level will be remembered. Pressing mute or volume up will cause the volume to return to the previous value~ A volume up or down request may additionally be acted upon by the processor as desired. Volume up (down) will remain at the highest level (lowest) volume level once it is reached regardless of how many times the volume is up (down) key is subsequently pressed. When turned off, the room terminal will go to the lowest volume level. When turned back on, the room ter-minal will return to the previous volume level.
While text data is being displayed, the room terminal keys may be configured to behave in different manners as described above. A
keystroke may cause a new page of data to be displayed and in turn reprogram the keys to a new set o~ actions corresponding to the new screen. This will be useful ~or implementing a menu type display.

~,0~7~ ~. 3 The key stroke or series of key strokes may be saved to be reported to the system manager. This is intended for functions needing verifica-tion from the system manager. Optiona!ly, the digit keys may be ech-oed on the screen.
Periodically, the system manager will download screens into RAM 217 of a room terminal. Other screens will be permanently resi-dent in the RO~I 219 of a room terminal. The priority of screens will be determined by the system manager. If a screen for a requested function is not currently resident in a terminal's memory, the default screen will be displayed such as "please stand by ...1l while data is reques~ed from the system manager. When the data is received it will be displayed. ~ channel number or the channel up, down or no but-tons may be used to abort this sequence. Further details of the gener-ation of character screens are incorporated herein by reference to U.S. Application Serial No. (Attorney Docket No. 25,875) entitled "Storage Control Method and Apparatus for an Interactive Television Terminal."
In this embodiment of service selection, specific unused chan-nel numbers are assigned to identify particular features. For exam-ple, channel 76 would be assigned to the room status/inventory func-tion and a unique feature start screen determined wherein either Fig-ure 10(a~ or Figure ll(a) is displayed. The unique feature start screen is displayed instead of an EIA (Electronic Industries Association) chan-nel number. Furthermore, channel 77, for e~ample. would be assigned to the wake-up feature wherein the screen of Figure 14(a) is dis-played.

1r;1r~r--~ 27 ~

In an alternative service selection embodiment, a menu driven interface is displayed at the room terminal. For example, rather than assigning channels 76 and 77 as above, only channel 76 would be assigned to a service menu. Room status and wake-up could then be selected along with other ~eatures from the service menu.
A room terminal user preferably tunes to the particular above-mentioned channel for a particular service by pressing an identifer key corresponding to a particular EIA channel. The identifer key cor-responds to the particular channel by a list stored in the room terminal's memory. For example, when the user pushes the "1" key, the liSt in memory can designate the key to EIA channel ~'6 where the room status service is displayed. The list stored in the room terminal's memory is programmable by commands sent from the sys-tem manager, thus configuring particular keys to particular EIA
channels.
Figure 3 is an exemplary screen of tabulated room status infor-mation and menu selections. These screens are preferably displayed at system manager 12 or printed on printer 18. "Occupied" may be selected from the menu. When the user selects the "Occupied~
option, the cursor is placed in the room box. If the user then enters a valid room name, the room specified is designated as "Occupied".
Otherwise, an error message "invalid room" iS displayed. ~'Vacant~ can also be sele~ted from the menu. When the user selects the "Vacant"
option, the cursor is placed in the room box. If the user then enters a valid room name9 the room specified is designated as "Vacant~'. Oth-erwise, an error me~sage "invalid room" is displayed. "Clean" can also be selected from the menu. ~hen the user selects the "Clean~ option.
the cursor is placed in the room box. The user then enters a valid room name, the room specified is designated as "Clean". Otherwise, an error message "invalid room" is displayed. The ''Cleanll designation signifies that a room has been cleaned by a maid, and that it is wait-ing to be inspected by a housekeeping supervisor. "Dirty" can also be selected from the menu. When the user selects the "Dirty" option. the cursor is placed in the room box. If the user then enters a valid room name, the room specified is designated as "Dirty". Otherwise, the error message l'invalid room" is displayed. The "Dirty" designation signifies that a room has not been cleaned, or that the room has been inspected and rejected by the housekeeping supervisor. "Ready" can also be selected from the menu. When the user selects the "Ready~' option, the cursor is placed in the room box. If the user then enters a valid room name, the room specified is designated as ~Ready~ Other-wise, an error message "invalid room" is displayed. The "Ready" des-ignation signifies that the room has been cleaned, inspected. and accepted by the housekeeping supervisor. "Out-of-Service" can also be selected from the menu. When the user selects the "Out-of-Serv-ice" option, the cursor is placed in the room box. If the user then enters a valid room name, the room specified is designated as "Out-of-Service". Otherwise, an error message "invalid room" is displayed.
The "Out-of-Service" status can be subsequently switched to either ~Vacant" or ~lOccupied" at the discretion of the user and the room shall assume its last known status of 'ICleanl', "Dirty", or l'Ready'l.
The above room status changes can also be stored on disk or sent to a y~

central billing computer (Property .~lanagement System) if desired.
The central billing can also print out the data if desired.
~ View" can be selected from the main menu. When the user selects the ~View~ option, the cursor is placed in the room box. If the user then enters a valid room name, the screen page on which the specified room appears is displayed. Otherwise, an error message ~invalid room~ is displayed. The screen page corresponding to the specified room can display historical room status information includ-ing current status ("Occupied". "Clean", etc.). the name or ID of the maid who made up the room, the name or ID of the inspector who inspected the room, guest information, wake-up information or any other information on the system pertaining to the particular room viewed.
~ Sort~' can be selected from the menu. When the user selects the sort option, an alternate set of rr.enu items appear as illustrated in Figure 4. These menu items list room status conditions. The rooms can then be sorted by status condition and the rooms exhibiting a par-ticular condition tabulated and illustrated as in Figure 5. Figure 5 illustrates a sort for all rooms exhibiting the "Dirty/Occupied" status condition. Note that rooms currently being cleaned have the ~'Dirty~
status condition. There~ore, any sorting involving the "Dirty" status condition will have those rooms displayed as well, along with the highlighted inspector IDs.
When the room name is entered in the room box, a special name ~'All" can be entered to designate every room in the hotel/hospi-tal. ~'All" is not a valid name when selecting the "View Room~ option.

.~ range of room names, such as 110-120, can also be entered into the room box, e.Ycept when selecting the ~View Room~ option.
As described above, room status can be altered using the above described screens from the system manager. Furthermore, if these screens are available at the room terminals, room status can also be altered in a like fashion. In addition. a maid, by cleaning a room and logging into the room terminal of the present invention automatically alters the room status stored at the system manager from ~Dirty~ to !IClean~ n inspector, after inspection of the room. will alter its status to either ~'Ready" or back to "Dirty". Further details of maid and inspector functions will be described below in conjunction with Figures 10(a)-10(c) and 11(a)-11(k). Furthermore, room status can also be altered from the central billing computer or any other interface to the present communication system if desired.
IlFind Maid" can be selected from the menu. ~Vhen the user selects the l~Find Maid" option, the cursor is placed in the maid box as illustrated in Figure 3. If the user then enters a valid housekeeper ID, the first occurrence of the screen page on which the specified maid appears is displayed. Otherwise. an error message ~invalid maid~ is displayed. If the housekeeper ID is not found (i.e., the specified maid is not actively cleaning the room) but has been active during the cur-rent day, the message l~maid not active, last found in room XXX" will be displayed. Otherwise, only "maid not active" is displayed. If this maid is logged into several rooms simultaneously, the first occurrence is displayed. Other notices, for example, that a maid is not presently cleaning a room are also possible.

3, ~ !Change IDs~ can be selected from the menu. The screen ofFigure 6 is displayed when the user selec~s this option. The menu of items on the change ID screen of Figure 6 are then possible. The user can select the "Add New Name" option and enter the employee name in the employee name box. Typically, the name will have a maximum character length. The system manager preferably treats the entire name as one string, and will not make any distinctions between first name, last name and middle initial. However, in an alternative embodiment, distinctions can be made between first name, last name and middle initial bv treating them as more than one character string.
When the user presses E~ITER the cursor is placed in the authori~a-tion box. The user is then prompted to enter either "M" for ~MAID~ or ~S" for "SUPERVISOR". The user is then prompted to enter a numeric code between the values of 0 and 999 inclusive into the identification box. Pressing "Esc" at any time during the input sequence will abort the entire add new name operation.
~ Change Name~' can also be selected from the menu tO change the name of an employee who has already been added. ~Change Iden-tification" can also be selected from the menu to change the identifi-cation number of an employee who has already been added. I~Change Authorization" can also be selected from the menu to change the authorization level of the employee. Preferably, the authorization level is toggled between maid and supervisor. ~dditionally, other authorization levels besides maid and supervisor may be provided.
~ View Name~ can be selected from the menu to blank the data displayed in all three boxes and place the cursor in the employee name box. The user ~hen enters the desired name. When the name is found. it is displayed along with its authorization identification num-ber. Otherwise. the message "name not found" is displayed. .~ com-parison is performed by searching to match the character string for the user entered in the ernployee name box with the named employee's character string stored in the system manager data base.
For example, if the user typed in the string "Smith" then the names l'Smith", ''Smithy" and "Smithinski" would all be considered as match-ing. In the case of multiple matches the user will be given the chance to view the next occurrence. Also, the comparison process shall not be case sensitive. Alternatively, other comparison techniques known to those of skill in the art can instead be used.
~ View Identification" can be selected from the menu to blank all three boxes displayed and place the cursor in the identification box. The user may then type in an ID and if the ID is found it will be displayed along with its name and authorization. Otherwise, the mes-sage "ID not foundl' is displayed. "Display IDs" can be selected from the menu of Figure 3. When "Display IDs~' is selected a screen similar to Figure 7 is displayed. "Backup Log" can be selected from the menu of Figure 3. When "Backup Log" is selected the system manager stores a backup of gathered historical data onto the disk.
Figures 10(a~-10(c) illustrate the sequence of events a maid (housekeeper~ will experience and Figures 11(a)-11(k) illustrate the sequence of events an inspector (housekeeping supervisor) will experi-ence on the screen of the television associated with a room terminal.
When room status/inventory is selected by tuning to the room status channel on a room terminal or by selecting room status on a main menu at a room terminal, the screen of either Figure 10(a) or Figure ll(a) will be displayed. An access code is then entered. The terminal compares the entered access code with legitimate secret access codes for an inspector or for a maid stored in terminal memory. If the access code is for a maid, the screen of Figure 10(b) will be displayed;
otherwise, if the access code is for an inspector, ~he screen of Figure 11(b) will be displayed.
In response to the screen of Figure 10(b), the maid then enters his or her housekeeper ID and begins cleaning the room. At this point the room status is automatically changed to "Occupied" or ~Vacanr and being made up by a particular maid number. The start time of the maid's cleaning is also stored for maid timekeeping purposes. Fur-thermore, the location of the maid is stored for maid locating fea-tures. When the maid finishes cleaning the room any key can be pressed in response to Figure 10~c) and the room status is changed to 'Clean". The time the room is finished being cleaned is also recorded.
The time a maid starts and finishes cleaning a room can be tabulated in a maid timekeeping matrix æ shown in Figure 9. The start time and finish time as well as the room number and maid num-ber can be tabulated. This information can be stored as h~storical data on a disk or can be sent to the billing computer as desired. Time informa~ion îor each maid can b~ sorted to determine the number of hours worked by a maid. This information can be tabulated by the system manager or ~he billing computer and analyzed to assist in maid scheduling activities. Furthermore, this information can be used in 2~l~7~3rJ

place of punch card timekeeping equipment for payroll purposes.
Special screens can be used for input of sign-in and sign-out informa-tion at the beginning and end of a maids work day. Furthermore, spe-cial screens other than that of Figure 9 and similar tO that of Figure 4 can be used for displaying and sorting maid time information. Time-keeping features, as discussed above for maids, can also be used for other employees such as inspectors, clerks, cooks, and bellhops or the like. In a hospital environment, the activities may be monitored for scheduling medicine delivery, hospi~al bed linen changing and the like.
In addition to using the timekeeping information for payroll purposes, the timekeeping information may also be used for time/task effi-ciency studies.
Preferably, the system manager keeps a lOg of maid and time information and supervisor transactions similar to that of Figure 7. A
maximum of 31 daily housekeeping files are kept (i.e., for one mon~h of historical data) although any number is possible. A new file ~ill override its counterpart from a previous month.
While a maid is making up a room (i.e., room status is vacant, dirty or being cleaned), the room terminal can be programmed so that the television cannot be tuned to any television program or entertain-men~ like distraction. Commands for initiating these features can be sent from the system manager ~o the r~om terminal where they are stored in RAM. Furthermore, these features can also be preset in ROM if desired.
In response to Figure ll(a~, when the access code for inspec-tion is entered, the screen of Figure ll(b) is displayed. After the l4~

house~eeping supervisor ID is entered, the housekeeping supervisor can select to approve/reject rooms or to display a list of rooms for inspection in accordance with Figure ll(c). An exemplary display of rooms to inspect is illustrated in Figure ll(d).
The selection of a single room or a range of rooms to approve/
reject is selected from the display exemplified by Figure ll(e). After a single room is inspected, the room name is entered in accordance with the screen exemplified by Figure ll(f). After the room name is entered, a key configured for accepting the room, rejecting the room, retrying the room, etc. is selected in accordance with Figure ll(f).
Rejected rooms are returned to the "Dirty" status and accepted rooms are given ~Ready~ status.
To inspect a range of rooms, the beginning of the range of rooms is entered in accordance with the screen exemplified by Figure ll(g) and the end of the range of the rooms is entered in accordance with the screen exemplified by Fi~ure 11(h). The range of rooms can then be accepted, rejected or cancelled in accordance with the screen exemplified by Figure ll(i). If accepted, inspection continues with Figure ll(k) and if the range of rooms is rejected inspection continues with the screen exemplified by Figure ll(j~. Another range of rooms can then be selected, the supervisor menu can then be chosen or inspection can then be terminated.
When the list of rooms ready to inspect is selected in acco~
dance with the screen exemplified by Figure ll(d), only nearby rooms instead OI all rooms may be displayed. For example, rooms on the current floor, the two floors above and the two floors below the room .
.

- 3~ -terminal are displayed. If this data comprises more than one screen, the first screen that contains a room on the current floor will be the first one shown. The current floor is computed by using the room name and ignoring the two least significant digits. However, other schemes of determining current floor can be used. When computing the floors above and below, the thirteenth floor may be ignored because of the predominant custom in the United States of America.
For rooms that exist with 13XX designations they will be shown, but they are assumed not to exist. Thus, if you are on floor 12, rooms ready for inspection on floors 10, 11, 12, 14, and 15 (and 13 if they exist) will be displayed. The rooms will always be shown in ascending numerical order. It may also be desirable to indicate the floor num-bers on the screen in addition to the room numbers. This would pre-vent a supPrvisor from thinking that these are the only rooms in the entire building that need inspection. Furthermore, the number of floors above and below those displayed may also be altered such that all floors are displayed or particular floors for a particular supervisor ID are displayed.
Figure 12 illustrates a screen tabulating wake-up information by room. The screerl can be selected at the system manager in response to a main menu such as that of the screen exemplified by Figure 8. An "Add" wake-up room option can be selected where the cursor is placed in the room box and the user enters the room to be added to the wake-up system. The cursor then jumps to the time box where the user enters the time that the guest asks to be awakened. A
IlDeletel' wak~up room option can be selec~ed where the cursor is placed in the room box and the user enters the room to be taken out of the wake-up alarm system. The room may also be automatically taken out of the wake-up schedule when the alarm time matches the system clock. Wake-up times and add and delete information can be entered by the billing computer instead of by the user of the system manager. Furthermore, as will be described in conjunction with Fig-ures 14(a~ and 14(b), wake-up alarms times can be directly entered at the room terminal by a guest.
Wake-up alarm functions can be configured at the system man-ager as exemplified by the screen of Figure 13 preferably displayed in response to the menu of Figure 8. Only the system manager can con-trol configuration of alarm functions. The local configuration allows a backup in case one or more room terminals is in an inoperative or error condition. Such a problem could exist if the room terminal either did not receive the initial command to set up the alarm sequence or the room terminal is not responding, meaning it could be in a loss of power situation. Under either of these or related condi-tions, the system manager will beep, display a message and if desired, print on a printer the rooms needing manual wake-up calls. The sys-tem manager can also under either of these conditions, send a warning alarm to the central billing computer or to a room terminal at a bellhopls station or a room terminal near the front desk. The wake-up alarm pr~warning time can be set to a predetermined number of min-utes in advance of the scheduled wake-up time. The system manager will indicate that manual wake-up calls, such as telephone calls, are necessary in lieu of automatic wak~up calls by the room terminal.

- 38 - ~ 7~

For example, a room~s wake-up time is set at 6:00 a.m. and the pre-warning time is 15 minutes, where at 5:45 a.m. if the set-top is in one of the error conditions, the beeping and warning message described above at the system manager is performed.
A desired alarm duration is set by the system manager as a ~wake-up alarm still on warning time" according to the local configu-ration as exemplified by Figure 13. The wake-up alarm still on warn-ing time is the number of minutes a particular guest has after sound-ing of the alarm to enter any key at the room terminal or a room ter-minal remote control to disable the alarm. If a guest does not disable the alarm be~ore the end of the wake-up alarm still on warning time, the system manager will beep and display a warning message and can if desired, print a list of rooms needing personal wake-up calls. The system manager can also send a warning alarm to the billing computer or to a room terminal at a bellhop's office, a maid station or a room terminal near the front desk. A personal visit to the room may be desired in the Instance the guest is a heavy sleeper or there has been an emergency such as the guPst has had a heart attack. For exam-ple, if a rosm's wake-up time ~s 6:00 a.m. and the still on warning time is 15 minutes, then at 6:15 a.m. if the room terminal alarm is still active and the feature is enabled, the warning actioos described are ta~cen. This also may set the actual duration of the audible alarm in the room and reset the terminal to an idle9 I'alarm off" condition.
In the perferred environment, each room terminal has an in~e~
nal real time clock. The real time clock is capable o~ k~eping time on its own. However, for improved accuracy an update signal is globally 39 ~ 7~3~5 sent by the system manager to the room terminals. This update signal is sent every minute by the system manager. The system manager receives time information preferably by satellite to calibrate its time clock. Thus, the system manager can be caiibrated via satelite in accordance with an accurate time source such as the National Bureau of Standarcls. Consequently, if at any time the system manager is not in synchronization with such a standard, the system manager and the terminals which it serves may be automatically recalibrated.
For example, in the event of a power failure at the system manager but not at the room terminal, the internal clock of the room terminal will keep the time. In this event, wake-up calls can still be performed as programed at the room terminal location even though there is a power failure at the system manager.
In the event of a power failure at the room terminal, the room terminal will be unable to keep time or sound the wake-up alarm until power resumes. When power resumes at the room ~erminal, the sys-tem manager will send the update signals that should have been received during the power failure. These update signals are prefera-bly sent at a fast rate of one signal per 150 miliseconds. The room terminal will quickly add each minute lost during the power failure to regain the corr~ct time. If a wake up call was programed to occur during the power failure, the clock will increment through every min-ute during the power failure and thus sound the wake-up alarm when the programmed time is established during the incrementing.
The real time clock of the room terminal preferably is an interupt driven subroutine programmed with the microprocessor.

However, alternative clock embodiments are possible. For example, the microprocessor can be a ~dumb~ clock whereby time is only incremented when an update signal is sent every minute by the system manager. In such an instance, in the event power fails at the system manager but does not fail at the room terminal, the time will freeze at the room terminal and not change until power is regained at the system manger. In an additional alternative embodiment, for exam-ple, a real time clock module can be used at the room terminal. This real time clack module would be similar to that used in a digital alarm clock. This real time clock module would be acurate enough~ that update signals from the system manager would not be necessary, although may still be desired so that all rooms may be synchronized to the same clock.
Figures 14(a) and 14(b) illustrate the sequence of wake-up screens displayed on a television associated with a room terminal.
The screen of Figure 14(a) can be selected for display by en~ering a predetermined wake-up channel via the terminalls keyboard or, alter-natively, by selecting wake-up on a main system menu or directory, for example, by tuning to channel 1. As indicated in Figure 14(a), a guest can view the scheduled wake-up time. Pressing the ~No~ key displays the scre~n of Figure 14(b). The display of Figure 14(b) dis-plays the current time in AM and PM format. The gues~ can clear the alarm to deactivate wake-up by pressing the "NO~ key. The guest can set the alarm by pressing the "CH+" key. The numeric keys can then be used to input a new wake-up time. The "BUY" key can be pressed to toggle the wak~up time between AM and PM. In response to a ' 2~ r~

polling request, after a new wake-up time is entered, the room ter-minal sends the wake-up time along with its room identification to the system manager. The "OK" key can be depressed to return the display back to the main system menu (or "directory~l) or a predeter-mined wake-up channel containing the display of Figure l~(a). ~lter-natively, military time format can be configured by the system man-ager for use rather than AM and PM indicators.
The system manager configur~ the room terminal to either clear the wake-up setting or maintain the wake-up setting for the next day, after a wake-up alarm has been sounded. A room terminal is preferably configurable to respond according to one of four options when a wake-up alarm is sounded: option 1-- clear any wake-up set-ting upon checkout; option 2 -- clear any wake-up setting upon checkin; option 3 -- never clear the wake-up setting; option 4 -- clear the wake-up setting after sounding the alarm.

Claims (36)

What is claimed is:

1. Two-way interactive room terminal for communicating room status information with a system manager of a cable television system, the terminal comprising:
a processor for processing data;
a memory associated with said processor:
a keyboard for inputting room status information to the terminal, the room status information being processed by the proces-sor;
a character generator, responsive to the processor, for generating at least one display screen of characters requiring key-board response; and a two-way cable television transceiver, responsive to the processor, for communicating processed room status information with the system manager.

2. The two-way interactive room terminal of claim 1, wherein one screen of characters comprises an indication of the room status information.

3. The two-way interactive room terminal of claim 2, wherein the screen of characters further comprises an indication of rooms to be prepared for occupancy.

4. The two-way interactive room terminal of claim 2, wherein the screen of characters further comprises an indication of rooms to be inspected.

5. The two-way interactive room terminal of claim 2, wherein the screen of characters further comprises an indication of one or more of the following status indications: occupied, vacant, clean, dirty, ready, or out-of-service.

6. The two-way interactive room terminal of claim 1.
wherein the screen of characters indicates the location of one or more maid or inspector.

7. The two-way interactive room terminal of claim 1, fur-ther comprising a tunable up/down video converter.

8. The two-way interactive room terminal of claim 1, fur-ther comprising an audible indicating device.

9. The two-way interactive room terminal of claim 1, wherein the keyboard comprises a remote control.

10. The two-way interactive room terminal of claim l, wherein the character generator indicates functions assigned to keys on the keyboard.

11. The two-way interactive room terminal of claim 1, fur-ther comprising an on/off switch and an AC outlet controlled by the on/off switch, the terminal capable of keyboard entry and communi-cation with the system manager regardless of the state of the on/off switch.

12. Two-way interactive room system comprising:
a room terminal comprising an audible wake-up alarm, a keyboard, and a two-way transceiver for communicating data com-prising at least wake-up data at cable television frequencies;
a system manager comprising a two-way transceiver for communicating at least wake-up data with a plurality of room termi-nals at cable television frequencies; and a television transmission link for connecting the trans-ceivers of the system manager and the plurality of room terminals.

13. The room system of claim 12, wherein the two-way transceiver of a room terminal sends a wake-up alarm responded to signal at cable television frequencies over the television transmission link to the two-way transceiver at the system manager upon actuation of a room terminal to turn off the audible wake-up alarm via the keyboard.

14. The room system of claim 13, wherein the system man-ager indicates a first warning condition if a predetermined warning time after sounding the audible wake-up alarm has lapsed and said wake-up alarm responded to signal has not been received.

15. The room system of claim 13, wherein the system man-ager indicates a second warning condition if a room terminal is inca-pable of sounding the audible wake-up alarm at a scheduled alarm time for its respective room at a predetermined pre-warning time before the scheduled alarm time.

16. The room system of claim 13, wherein scheduled alarm times may be entered at the keyboard of the room terminal or at the system manager.

17. The room system of claim 14, wherein the predeter-mined warning time may be entered at the system manager.

18. The room system of claim 12, wherein the room ter-minal is a slave that responds to polling signals from the system manager.

19. The room system of claim 12, wherein the room ter-minal further comprises a character generator for generating at least one display screen of characters.

20. Two-way interactive room terminal for communication of wake-up information with a system manager of a cable system, the terminal comprising:
a processor for processing data:
a memory associated with said processor;
a keyboard for inputting wake-up information to the terminal, the wake-up information being processed by the processor;
a character generator, responsive to the processor, for generating at least one display screen of characters requiring key-board response; and a two-way cable television transceiver, responsive to the processor, for communicating wake-up information with the sys-tem manager.

21. The two-way interactive room terminal of claim 20, wherein a screen of characters indicates wake-up information.

22. The two-way interactive room terminal of claim 20, wherein the room terminal sends a wake-up alarm responded to signal at television frequencies over the television transmission link to the system manager upon actuation of a room terminal to turn off the audible wake-up alarm via the keyboard.

23. The two-way interactive room terminal of claim 22, wherein the system manager indicates a first warning condition if a predetermined warning time after sounding the audible wake-up alarm has lapsed and said wake-up alarm responded to signal has not been received.

24. The two-way interactive room terminal of claim 20, wherein the system manager indicates a second warning condition if a room terminal is incapable of sounding the audible wake-up alarm at a scheduled alarm time for its respective room at a predetermined pre-warning time before the scheduled alarm time.

25. The two-way interactive room terminal of claim 20, wherein scheduled alarm times may be entered at least at the key-board of the room terminal.

26. The two-way interactive room terminal of claim 20, wherein the two-way cable television transceiver communicates with the system manager at cable television frequencies.

27. The two-way interactive room terminal of claim 20, wherein the room terminals are slaves that respond to polling signals from the system manager.

28. The two-way interactive room terminal of claim 20, further comprising a tunable up/down video converter.

29. The two-way interactive room terminal of claim 20, further comprising an audible indicating device.

30. Two-way interactive rom terminal of claim 20, wherein the key board comprises a remote control.

31. The two-way interactive room terminal of claim 20, wherein the character generator indicates functions assigned to keys on the keyboard.

32. The two-way interactive room terminal of claim 20, further comprising an on/off switch and an AC outlet controlled by the on/off switch, the terminal capable of keyboard entry and com-munication with the system manager regardless of the state of the on/off switch.

33. A method of communicating room status information between a room terminal and a system manager of a cable television system, the method comprising the steps of:
first receiving data at a point in time indicating a particular employee has begun work at a particular location;
second storing a label for the particular room and a label for the particular employee along with data indicating said point in time;
third receiving data at a later point in time indicating work completion at a particular location; and fourth storing said label for said particular location and said label for said particular employee along with data indicating said later point in time.

34. The method of claim 33, wherein said fourth storing step further comprises the step of changing the status of said particular location from dirty to clean.

35. The method of claim 33. further comprising the steps of:
fifth receiving inspection data indicating inspection of a par-ticular location; and sixth storing the inspection data for said particular location.

36. The method of claim 35, wherein said inspection data indicates said particular location has a ready or a dirty status, and wherein said sixth storing step further comprises the step of changing the status for said particular location to the ready or the dirty status indicated by said inspection data.