CA2029397A1 - Arrangement for connecting a telefax device or a telephone set to a telecommunication line - Google Patents

Arrangement for connecting a telefax device or a telephone set to a telecommunication line

Info

Publication number
CA2029397A1
CA2029397A1 CA002029397A CA2029397A CA2029397A1 CA 2029397 A1 CA2029397 A1 CA 2029397A1 CA 002029397 A CA002029397 A CA 002029397A CA 2029397 A CA2029397 A CA 2029397A CA 2029397 A1 CA2029397 A1 CA 2029397A1
Authority
CA
Canada
Prior art keywords
connection
line
telephone
output
detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA002029397A
Other languages
French (fr)
Inventor
Ronald B. Van Santbrink
Willem H. M. De Vries
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTERSTRUCTURE BV
Original Assignee
INTERSTRUCTURE B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INTERSTRUCTURE B.V. filed Critical INTERSTRUCTURE B.V.
Publication of CA2029397A1 publication Critical patent/CA2029397A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H04N1/32704Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
    • H04N1/32706Type of the other apparatus
    • H04N1/32708Telephone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H04N1/32704Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H04N1/32704Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
    • H04N1/32715Detecting
    • H04N1/32719Detecting a facsimile calling signal, e.g. CNG
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H04N1/32704Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
    • H04N1/32715Detecting
    • H04N1/32723Detecting speech signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H04N1/32704Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
    • H04N1/32715Detecting
    • H04N1/32728Detecting an off-hook condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/327Initiating, continuing or ending a single-mode communication; Handshaking therefor
    • H04N1/32704Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
    • H04N1/32747Controlling the connection of the apparatus
    • H04N1/3275Giving priority to one of the apparatus
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S379/00Telephonic communications
    • Y10S379/902Auto-switch for an incoming voice data, or fax telephone call, e.g. comp/fax/tel

Abstract

ABSTRACT

Disclosed is an arrangement for optionally connecting a facsimile device or a telephone set to a telecommunication subscriber line, comprising a line input for connecting the sub-scriber line, a telephone output for connecting the telephone set and comprising a telefax output for connecting the facsimile device. The arrangement comprises:
* a line seizing circuit for seizing the subscriber line in response to a call signal from the subscriber line;
* first detection devices for detecting voice signals or predetermined tone signals, which first detection devices produce a first connection control signal on detection of the signals and produce a second connection control signal in all further cases;
* second detection devices for detecting voice signals, which second detection devices produce a second connection control;
signal on detection of voice signals and produce the first connection control signal in all further cases;
* connected to the two detection devices, connection devices for establishing a connection between the line input and the telefax output in response to the first connection control signal and for establishing a connection between the line input and the telephone output in response to the second connection control signal;
* selection devices for activating the first or second detection devices as desired by the user.

Description

2Q29~97 PHQ 89-043 1 ~ ~

: ' The invention relates to an arrangement for optionally connecting a facsimile device or a telephone set to a telecommunication subscriber line,~ comprising a line input for connecting the subscriber line, a telephone output for connecting the telephone set and comprising a telefax output for connecting the facsimile device.
` ~he invention likewise relates to a facsimile device comprising such an arrangement.
Facsimile devices are widely known. It~ls customary to ~ ;
connect a facsimile device~to its~own subscIiber line~intended for thLs purpuse. In that case the facsimile~device has its own~telephone number. A disadvantage of this~manner of connectlon~s the entailing cost: both~from the subscriber s~point of ~iew~vho~has~to pay for~an ~
additional subscriber connection and~from a public~point of view~because for this purpose~a teIecommunication line is laid out which~will~not be utilised intensively. (In practice telefax lin;e~s~are used much less~ ;~
intensively than telephone lines)~
It is also possible~to~connect a telefax dévice and a telephone set to a single subscriber line~ ~In~that~;case the telefax device~and the~telephone set have~the~same telephone number. The connection between either of these;~devices and the subscriber line is then~realised by~means~of a so-~called~splltter, the~subscriber thPn~
regulating~whether the telefax device or the telephone set is connected to the subscriber line~ With this type of~connection it is a detrimental effect~that auto= tic telefax calls cannot be processed automatically ~if the telephone set is connected~to the subscriber line)~or, alternatively, that~the subscriber cannot be reached over the telephone (if the telefax device is connected to the subscriber line).
It is an object of the invention to augment the applications of a telecommunication subscriber line, whilst automatic completion of the telefax traffic is possible and at the same time, ~ -without the subscriber s intervention automatic telephone traffic on the same line remains possible. ~
For this purpose the arrangement according to the invention is characterised in that it comprises: ~
* a line seizing circuit for seizing the subscriber line in . ~, .
,, , . ", : -, ---., ,- .. .

202~397 response to a call signal from the subscriber Iine;
* first detection means for detecting voice signals or predetermined tone signals, which first detection means produce a first connection control si~nal on detection of said signals and produce a second connection control signal in all further cases;
second detection means ~or detecting voice signals, which second detection means produce a second connection control signal on detection of voice signals and produce the first connection control signal in all further cases;
connected to the two detection means, connection means for ~-establishing a connection between the line input and the telefax output in response to the first connection control signal and for establishing a connection between the line input and the telephone output in response to the second connection control signal;
selertion means for switching the first or second detection means operative as desired by the user.
Two different operating states can be realised by the selection means. Once the flrst~dete~ction means have been switched operative, the incoming call will be switched to the telephone set unless voice signals or telefax tones are~detected. In this operating state the use of the subscriber line for telephone purposes is given priority. Once the second detection~means have been switched operative the incoming call will be switched to the telefax device unless a voice signal is detected. In this operating~state the use of the~subscriber line for telefax purposes is given priority.
When i~plementing the above measures a number of advantages are achieved. The first advantage is found in the cost-~effectiveness with respect to a separate line for the facsimile device, because now only a single telecommunication line is necessary, both for telephone and facsimile. Automatic processing of both facsimile traffic and telephone traffic is liXewise possible without the subscriber s intervention. A second advantage is found in the fact that anyone who already had a separate telefax subscriber line no~ has the disposal of an additional telephone line when utilising the invention. If necessary, this additional telephone line may be used for arranging a so~called ex-directory telephone number so that emergency telephone traffic may be -: :,: , :, :. ::, :. ,:,:, , ,:, - - : : ~ :
2~2~97 : ~
~. .

effected over this additional telephone line.
A third ~dvantage is found in creating the possibility of a so-called "night operation" for the relevant telecommunication line.
For that matter, there is a possibility that the calling telefax device lS a device of a type that does not transmit signals itself after the call has been made but waits for signals from the called station. For example, this is the case with equipment not operating according to CCITT Recommendations. If the user of the receiving telefax has switched the second detection means operative via the selection means, no voice signal will be detected after the call from a subscriber line so that the first connection control signal will be produced. Consequently, as desired, a connection will be established between the subscriber line and the receiving telef-x device. Even automatic.lly operating telefax devices tthus according to;the CCITT Standard) are switched in this manner because after the second answering-text no voice ~signals are detected but only tone signals which~are~distingulshed from the voice slgnals. In neither of these cases the user's telephone will ring.
The advantage of~the~additionally available telephone line particularly manifests itself if the arrangement according to the nvention is contained in a telefax device so that the user, when purchasing this device, at the same time has the disposal of an additional telephone connection.
; ; The invention will now be further expl~ined with reference to the Figures, in which: ~
Fig. 1 shows~a~flowchart illustrating the operatlon of the arrangement according to the invention; ~
Fig. 2 shows a block diagram;of the arrangement according to the invention :
~ In the flowchart as shown in Fig. 1 the blocks have the following connotations-202~397 . ` `
, Block No. Legends Connotation 1 START Beginning of the fIow chart, the arrangement waits for a call~from the subscriber line.
2 CALL DET A call rrom the subscriber line is ~ ;
detected 3 1ST OR 2ND Choice between the rirst and second OP STATE operating state.
4 TXT 1 The first answering text is tran5mitted.
S CNG, ~OICE It is verified whether facsi~ile tones or ~oice siqnals are detected after the first answering text.
6 TXT 2 ~A second answering text is transmitted. ~-7 ~ VOICE~CNG It~ia~erifred~whether~volce~signals are detected. ~ ~ ~
8 CNNCT~TEL ~A~connection is~established between the telephone~set~and~the~subscribe~r~line.;
9CNNCT FAX ~ A connection is e~stablished between the ;subscriber~line~and~the facsimile de~ice.
Once the arrangement~according to the invention tto be termed selector circuit hereinafter) hàs been connected to the subscriber line,~ to the telephone set and~to the~facDimile device and put into operation,-the selector circuit~waits for a~call from the subscriber line~to appeaI (block No~.~l). If~a call from the~subscriber line appears (block No. 2j, the furthe~processing of this call depends on the operating state~set by~the user (block No. 3). In the scope of the invention two operat mq states are possible: the first opsrating state is termed telephone prlority, the second~operating state is termed fax priority.
If telephone priority~has been set by the user, it is possible that the selector circuit transmits an answering text (block No. 4). This answering text mlqht,~for example, read as follows: "If you wish to send a facsimile-message, state fax~. However, it is alternatively possible that this answering text is not transmitted. The processing of the~telecommunication call is now further proceeded with in a detection phase (blocX No. 5). In this detection phase the selector circuit detects signals coming from the subscriber line. If the call is - - . - - .. . -. ., .. , ,, .: . . - . , , 2~2~3~

made by an automatic fax, the selector circuit will detect facsimile tones and the subscriber line will be switched to the facsimile device tblock No. 9)~ If the detection phase is preceded by an answering text, there will be a possibility that the selector circuit detects voice signals during the detection phase. In that case the voice signals are assumed to contain the word fax and the ~acsimile device will thus be switched to. In this manner manually operated facsimile devices can be connected. If neither facsimile tones nor voice signals a~e detected, it is assumed that the incoming call is a telephone call and the subscriber li~e will be connected to the telephone set (block No. 8). The connotation of telephone priority is derived from the fact that the telephone set is always connected to unless there are signals on the subscriber line that induce connection to the facsimile ~evice.
In the second operating~state it is likewise possible to send an answering text to the subscriber~line (block No. 6). This answering text could read, for example:~UIf you wish to telephone say telephone". The sequel to the handling of the~telecommunication call in this second operating state takes place in a~detection phase (block No.
7). During this detection phase the selector circuit is arranged for detecting voice signals. If a voice signal is detected the caller is assumed to have stated that he wishes to telephone and be switched to the telephone set. In the absence of detected voice signals the telefax device will be switched to. In principle it may bP assumed that any sound having a certain minimum time duration is a voice signai. However, in order to avoid that incoming traffic from an automatic telefax device that sends out telefax tones is switched through to the telephone set, a distinction between voice signals and telefax tones is to be made during the voice signal detection phase according to block No. 7. When voice signals are detected, detection of sound signals which are not fax tones may thus suffice. The term of fax priority is due to the fact that in all cases the facsimile device is switched to unless voice signals are detected which leads to the telephone set being swltched to.
Omission of the first answering text (block No. 4) would create the possibility of an ex-directory telephone number. The callers who have been informed of this possibility only need to ~emain silent after making the call because they know that they will then be switched automatically to the telephone set.

` 2~2~3~7 . .
Also in the second operating state it is possible to omit the answering text (block 6). The user then has the possibility to render himself unreachable over the telephone. Any caller who is not informed of this option will then be switched to the facsimile device and will subsequently disconnect.
Figure 2 shows a block diagram of the selector circuit according to the invention. The selector circuit com-prises a line input 1 for connecting the subscriber line, a tele-phone output 2 for connecting a telephone set and a telefax output 3 for connecting a facsimile device~. ~
The line input I is connected to a DC detector 20 which in turn is connected to a rectifier circuit 21. To the :
output of DC detector 20 is aIso connected~ an AC detector 19 for detecting ringing slgnals. Vla DC detector 20 line lnput 1 is -also connected to switches 9 and 11 for connecting the telephone set and the facsimile device respectively; these switches 9 and 11 are controlled by a microprocessor 7. ~ ~
The control of the selector circuit according to the :
~ inventlon is effected by microprocessor 7 comprising the software ~ necessary for this purpose. This software provides the implementation of the flowchart as shown in Figure 1. By means of the control key 13 the~user may feed indications to the memory 14 beIonging to the microprocessor 7, as a result of which indications the desired program run (operating state) is achieved.
For microprocessor 7 any type of customary commercially availahle processor may be used. In that case a 4 kbit m~mory should be ~029397 . ~

- 6a - 20104-8673 :~
:
connected to the microprocessor. In this memory the program that runs the flow diagram is stored. It is also possible to integrate the 4 kbit memory in the microprocessor, in the latter case only an external memory 14 for storing the settings of the selector circuit is sufficient. For memory 14 may be used an EEPROM memory of the type NMC 9306 ~16 x 16 bits).
The selector circuit further includes a telecom-munication circuit 4 connected t~ line input 1 vla a processor-controlled switch 8 and the rectifier 21 and~DC detector 20.
~10~ Telecommunication clrcuit ~4~performs a number~of telecommunicatlon functions: maintalnlng~a DC~current~path for seizing the~sub- ;
scriber linej sendlng~signals to~the~subscrlber~ ne~and receiving signals therefrom. This circuit~likewlse~provi~des the required line terminating impedance.~ Such circuits~ are of~common ~
knowledge; a commercially ava1lable circuit is,~for example, the PhilLps TEA 1061 circult.~Te1ecommunlcatlon circult 4 has an~
output connected~to the tone~detectlon~clrcu~t 25 whose output ~- is connected~to~microprocessor 7. ~ ~
.

:

:

: : ' :

:

` 2~293~7 ,: . ^~ 7 The selector CilCUit according to Fig. 2 further includes a voice detection circuit 5 controlled by microprocessor 7 and whose output applies signals to this microprocessor. The input of voice detection circuit 5 is connected to the signal output o~ the telecommunication circuit 4. ~oice detection circuits may generally be arranged for distinguishing the human voice from other sounds, or distinguishing specific words or word groups in the voice signals. In the scope of the invention it is not important which type of voice detection circuit is used.
As a voica detection circ~it may be used here a circuit establishing the envelope of the incoming signal, insofar this signal exceeds a specific threshold. Such circuits are of common knowledge and easy to realise for those skilled in the art. The envelope thus obtained is then applied to microprocessor~7 performing the evaluation of this signal.
The selector circuit further lncludes a speech controller 6 controlled by microprocessol 7 and whose output is connected to the signal input of telecommunication circuit 4.
Speech controller 6 may be arranged as the combination of a speech memory and a speech controller connected thereto. The digital signal produced by the speech controller is then processed into a voice -signal by means of proper amplification and filtering. As a speech memory may be used a customary 256 Xbit EPROM of the 27 C 256 type; the speech controller is, for example, the commercially available speech controller UM 5100 manufactured by United Microelectronics Corporation.
The selector circuit as shown in Fig. 2 further includes a tone generator 15 controlled by a~microprocessor 7. The output of this tone generator is connected to~the input of telecommunication CilCUit 4. The tone generator is formed, for example, by a combination of a suitabie output of microprocessor 7 producing the desired (digital) frequency and a filter for converting the dlgitaI signal lnto a sinusoidal signal. To the signal output of telecommunication circuit 4 iS al50 connected a busy tone detector 16 (formed by a series connection of a bandpass filter and an envelope detector) whose output is connected to microprocessor 7.
An off-hook detector 17 or 18 respectively, is connected to the telephone output 2 and the fax output 3, for ascertaining the ~` 202~397 ~

:
. . 8 hook contact of the connected telephone set or facsimile device. Supply voltage terminals 23 and 24 for feeding the telephone set and the facsimile device are also connected to said outputs. Also for the benefit of the two said outputs a ringing voltage terminal 22 is connected for supplying the rin~ing valtage to the telephone set or facsimile device respectively. This ringing voltage is applied via a switch 10 or 12 respectively, which switches are controlled by microprocessor 7.
Microprocessor 7 further includes a memory 14 and a control key 13. This control key may be used by the user to set a desired operating state.
If a telecommunication call in the form of a ringing signal arrives at line input 1, this ringing signal is recognised by AC
detector 19 whicb sends a~signal to microprocessor 7 in response thereto. As a reaction, microprocessor i~sends~out a slgnal to the processor-controlled switch 8~which establishes~ a~connectlon between telecommunication circuit 4 and line input 1.~Telecommunication circuit 4 establishes a DC path for~the subscrlber~line as a result~of which the subscriber line is seized.
;The further handling~of the~telecommunication traffic by the selector circuit depends~on~the operating state set by the user by means of the control key 13. It is assumed that the operating state with telephone priority is switched on. Now it is possible,; Got necessary~
though, that a first answering text i5 sent out;in which the calling ~arty is invited:~to~state that he wishes to send a facsimile message.
This answering text is sent on the initiative of the microprocessor 7 which sends a control signal to speech generator 6 which sends the answering text~through telecommunication circuit 4 to the subscriber line through line input 1. Once the first answering text has been sent, microprocessor 7 act1vates the voice detect1on circuit 5 and tone detection circuit 25 to detect voice andlor tone signals. If either of these circuits or both circuits detects/detect the relevant signal, itlthey sendslsend a signal to microprocessor 7 which renders switch 12 conductive (closed) in response thereto. Consequently, the ringing volta~e through input 22 is sent to fax output 3, so that the fax device is called up. If off-hook detector 18 detects the facsimile device answering the call, this ci~cuit sends a signal to microprocessor 7 ' ~,- , . , .. ' . ~: .

` ` 2~397 . ; ,:
g which, in response thereto, renders switch 12 non-conducti~e and switch 11 conductive. This establishes the connection between the subscriber line and the facsimile device.
AlternatiYely, it is possible that during the detection phase neither the voice detector 5 nor tone detector 25 has detected a signal. In that case microprocessor 7 renders switch 10 nan-conductive, so that the ringing voltage is applied to telephone output 2 through input 22. I~ off-hook detector 17 ascertains that the call is answered by the telephone set, this detection circuit will send a signal to microprocessor 7 as the result of which switch 10 will be opened and switch 9 will be closed. Consequently, a connection has been established between the subscriber line and the telephone set through telephone output 2.
Now it is assumed that the user of the selector circuit has set the operatins state to fax priority. After the-subscriber line has been seized under the control of the microprocessor 7, a second answering text may, not necessarlly though, be sent:out~. This answering text may contain an invitation to the calling`party to state whether a telephone connection is desired. Subsequently, the~microprocessor 7 activates the voice detector S to detect any voice signals during the detection phase that now folIows. If voice~detector 5 detects voice signals, it will send a signal to microprocessor 7 which, in response thereto, will actiYate switches 10 and 9 in the way described hereinbefore with respect~to the operating state with telephone ~prlority. If na ~oice signals are detected by the voice detector 5, microprocessor 7 will control the switches 11 and 12 as a result of which a telefax connection will be establlshed be~ween line input 1 and the facsimile output 3, as described with reference to the operating state with telephone priority. ~ -Once the exchange of information has been terminated, the calling party may disconnect the telecommunication connection. In that - -case line input 1 will receive busy tones detected by the busy tone detector 16 in response to which this detector will send a corresponding signal to microprocessor 7. In response thereto microprocessor 7 will send out a signal to switch 8 andjor 9 and/or 11, due to which the subscriber line will no longer remain engaged. This will terminate the telecommunication connection.

2~3~7 ::

There is a possibility that a facsimile de~ice connected to the telefax output 3 falls out of operation, for example, because the quantity of paper of the device has been used up. If such a facsimile device is able to detect this situation (as is the case with virtually all facsimile devices) this device will change to an operating state in which calls (this is the supply of ringing voltage) are no longer answered. In that case, howe~er, a call f~om the subscriber line would already be answered by the detector circuit seizing this line whereas yet no telefax connection is being established. However, the cost of establishing a connection is ne~ertheless charged to the calling party.
In order to avoid constant (vain) attempts at establishing~a connection being made by automatic calling telefax equipment~(with the attendant cost), the selector circuit includes~measures to~that effect.
The call to the fax output is made, for example, with a ringing voltage of which the generation is controlled by microprocessor 7. Answering this call is detected by off-ook detector 18. A vain call x~
is made if the call has not~been answered within a given period of time , after the beginning of the call. Already after a single vain caIl it may be decided that the facsimile device has~fallçn out of operation but, alternatively, it is possible to do so after two or three vain attempts. A call which may be vain because the facsimile device was just carrying out another task (for example, printing a sur~ey of received calls) will then not immediately lead to the out-of-operation decision.
After the predetermined nu~oer of~consecutive vain~calls microprocessor 7 will render swltch 10 constantly conductive as a resuIt of which the combrnation of the selector circuit and the connected telephone set behaves like an ordinary telephone set. This prevents that automatic calling telefax devices repeatedly try to est~blish a connection.
If, induced by a call from the subscriber line, the selector circuit changes to sending a call signal (ringing voltage) to the telephone output 2, it is possible to send simultaneously a tone signal to the line input 1. The calling party will then know that the telephone call is in the phase in which it is being actively dealt with. This tone signal may have a frequency and a repetition rate which are equal to that of the public networX. Alternatively, it is possible, however, to have them clearly distinguished therefrom so as to fulfill the requirements made by specific network managements. Both magnitudes :
2~9~97 :~-.~ .
- ` 11 ~ ,, ~requency and repetition rate) may be attained by a suitable processor memory-s~tting kno~n per se.

` ~ ' ~ :
:

.:
; : : : : : ~ ~ :
:
:: ` : : : :
: : : : :: : : :
:: :~ : :
::

Claims (3)

1. Arrangement for optionally connecting a facsimile device or a telephone set to a telecommunication subscriber line, comprising a line input for connecting the subscriber line, a telephone output for connecting the telephone set and comprising a telefax output for connecting the facsimile device, characterised in that this arrangement comprises:
* a line seizing circuit for seizing the subscriber line in response to a call signal from the subscriber line;
* first detection means for detecting voice signals or predetermined tone signals, which first detection means produce a first connection control signal on detection of said signals and produce a second connection control signal in all further cases;
* second detection means for detecting voice signals, which second detection means produce a second connection control signal on detection of voice signals and produce the first connection control signal in all further cases;
* connected to the two detection means, connection means for establishing a connection between the line input and the telefax output in response to the first connection control signal and for establishing a connection between the line input and the telephone output in response to the second connection control signal;
* selection means for activating the first or second detection means as desired by the user.
2. Arrangement as claimed in Claim 1, characterised in that the arrangement comprises * means for detecting a predetermined number of consecutive vain calls to the fax output and for producing an out-of-operation signal on detection of the call;
* means for establishing a connection between the line input and the telefax output in response to the out-of-operation signal, which connection is to be terminated only by the intervention of the user;
* and means for terminating the permanent connection under the control of a control unit.
3. Facsimile device comprising a selector circuit as claimed in one of the preceding Claims.
CA002029397A 1989-11-07 1990-11-06 Arrangement for connecting a telefax device or a telephone set to a telecommunication line Abandoned CA2029397A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902743 1989-11-07
NL8902743A NL8902743A (en) 1989-11-07 1989-11-07 DEVICE FOR CONNECTING A TELEFAX DEVICE OR A TELEPHONE TO A TELECOMMUNICATION LINE.

Publications (1)

Publication Number Publication Date
CA2029397A1 true CA2029397A1 (en) 1991-05-08

Family

ID=19855579

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002029397A Abandoned CA2029397A1 (en) 1989-11-07 1990-11-06 Arrangement for connecting a telefax device or a telephone set to a telecommunication line

Country Status (12)

Country Link
US (1) US5113432A (en)
EP (1) EP0436238A1 (en)
JP (1) JPH03175777A (en)
KR (1) KR910010989A (en)
CN (1) CN1051837A (en)
BR (1) BR9005638A (en)
CA (1) CA2029397A1 (en)
CS (1) CS548990A3 (en)
FI (1) FI905495A0 (en)
HU (1) HUT58171A (en)
NL (1) NL8902743A (en)
NO (1) NO904845L (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0457434A (en) * 1990-06-27 1992-02-25 Canon Inc Communication terminal equipment
EP0474172A3 (en) * 1990-09-06 1993-03-03 Teletron Ltd. Telephone line monitoring apparatus and method
JPH04266263A (en) * 1991-02-20 1992-09-22 Fujitsu Ltd Priority recording system
US5315644A (en) * 1991-11-21 1994-05-24 Harris Corporation Telephone interface circuit
JPH06233000A (en) * 1993-02-08 1994-08-19 Matsushita Electric Ind Co Ltd Facsimile equipment
US5638436A (en) * 1994-01-12 1997-06-10 Dialogic Corporation Voice detection
US5459781A (en) * 1994-01-12 1995-10-17 Dialogic Corporation Selectively activated dual tone multi-frequency detector
JP3450436B2 (en) * 1994-05-30 2003-09-22 キヤノン株式会社 Facsimile machine
US5748719A (en) * 1995-12-22 1998-05-05 Compaq Computer Corporation Relay circuit for telephone interface
KR100238683B1 (en) * 1997-02-10 2000-01-15 윤종용 Method of receiving facsimile having external telephone
DE19811430C1 (en) * 1998-03-17 1999-07-29 Deutsche Telekom Ag Telecommunication extension system with fax switch, fax machine, answering machine and one or more telephones
EP0964562A1 (en) 1998-06-10 1999-12-15 Sun Microsystems, Inc. Telephony control mechanism
EP0964565A1 (en) * 1998-06-10 1999-12-15 Sun Microsystems, Inc. Call handling mechanism
US20060203982A1 (en) * 2005-03-14 2006-09-14 Lexmark International, Inc. Method and system for auto-routing fax and voice signals
CN101086508B (en) * 2006-06-07 2010-05-12 瀚斯宝丽股份有限公司 Checking apparatus and its connector and checking method
JP4847270B2 (en) * 2006-10-12 2011-12-28 キヤノン株式会社 Facsimile device, control method therefor, program, and storage medium
JP5780773B2 (en) * 2011-02-10 2015-09-16 キヤノン株式会社 Facsimile apparatus, control method therefor, and program

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815121A (en) * 1984-06-06 1989-03-21 Canon Kabushiki Kaisha Communication apparatus recognizing speech and automatically switching from data to speech transmission
GB2169174B (en) * 1984-11-28 1989-06-01 Canon Kk Data communication apparatus
JPS61177065A (en) * 1985-02-01 1986-08-08 Nec Corp Facsimile equipment
JP2649795B2 (en) * 1986-02-26 1997-09-03 キヤノン株式会社 Communication device
JPS63191456A (en) * 1987-02-04 1988-08-08 Matsushita Electric Ind Co Ltd Line terminal equipment
US4868865A (en) * 1987-02-27 1989-09-19 Kabushiki Kaisha Toshiba Terminal switching control apparatus
EP0310001B1 (en) * 1987-09-30 1994-11-30 Sharp Kabushiki Kaisha Facsimile communication apparatus
US4821312B1 (en) * 1987-10-14 1991-06-25 Voice/data switch
US5222126A (en) * 1987-11-16 1993-06-22 Canon Kabushiki Kaisha Communication apparatus connected to other communication terminals
JPH0759009B2 (en) * 1987-11-30 1995-06-21 株式会社東芝 Line connection switching device
US4974253A (en) * 1987-12-31 1990-11-27 Hashimoto Corporation System and method for controlling facsimile apparatus in response to a computer generated signal or a CNG signal

Also Published As

Publication number Publication date
JPH03175777A (en) 1991-07-30
CN1051837A (en) 1991-05-29
HUT58171A (en) 1992-01-28
EP0436238A1 (en) 1991-07-10
BR9005638A (en) 1991-09-17
NO904845L (en) 1991-05-08
CS548990A3 (en) 1992-04-15
FI905495A0 (en) 1990-11-06
KR910010989A (en) 1991-06-29
NO904845D0 (en) 1990-11-07
US5113432A (en) 1992-05-12
NL8902743A (en) 1991-06-03
HU907043D0 (en) 1991-05-28

Similar Documents

Publication Publication Date Title
CA2029397A1 (en) Arrangement for connecting a telefax device or a telephone set to a telecommunication line
US5836009A (en) Caller ID telephone with signal attenuation
US5706336A (en) Telephone system circuitry for discriminating between voice and data transmissions
US5953407A (en) Distinctive ringing and distinctive call-waiting tones in an ISDN
EP0688126A2 (en) A voice messaging system
EP1185063B1 (en) System and method for announcing a message through a private branch exchange
EP0668686A1 (en) Home telephone system
KR100218882B1 (en) Sender's number notifying method of a switching system
US6636595B1 (en) Non-KSU message delivery system
JPS6023539B2 (en) Facsimile calling method
JPH11331153A (en) Transmission control method for isdn terminal adapter
JP3275267B2 (en) Variable incoming call response terminal
JPH01190061A (en) Telephone system
JP3016723B2 (en) Communication system, mobile communication system, automatic call receiving method, and mobile device
JP4183147B2 (en) Communication terminal, control method
JP3765126B2 (en) Wireless fixed terminal equipment
CN1642196B (en) Method for receiving inputting information of telephone users
JPH06133350A (en) Idsn key telephone system
JPS631137A (en) System for reporting incoming of evilminded call
JPH05268318A (en) Communication system
JPH04280564A (en) Facsimile equipment
JPH0548735A (en) Detection system for calling subscriber number
JPS58188957A (en) Controller for facsimile terminal circuit
JPH0884189A (en) Communication terminal equipment and key telephone system
JPH05130208A (en) Automatic answering telephone set

Legal Events

Date Code Title Description
FZDE Discontinued