CA2134015A1 - Method for Automatically Adapting and Configurating the Speed of a Terminal Adapter to Either 56KPBS or 64KBPS in Accordance of the Actual Transmission Rate Being Used - Google Patents

Method for Automatically Adapting and Configurating the Speed of a Terminal Adapter to Either 56KPBS or 64KBPS in Accordance of the Actual Transmission Rate Being Used

Info

Publication number
CA2134015A1
CA2134015A1 CA2134015A CA2134015A CA2134015A1 CA 2134015 A1 CA2134015 A1 CA 2134015A1 CA 2134015 A CA2134015 A CA 2134015A CA 2134015 A CA2134015 A CA 2134015A CA 2134015 A1 CA2134015 A1 CA 2134015A1
Authority
CA
Canada
Prior art keywords
kbps
pattern
64kbps
rate
period
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.)
Granted
Application number
CA2134015A
Other languages
French (fr)
Other versions
CA2134015C (en
Inventor
Pascal Chauffour
Michel Froissart
Dominique Vinot
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of CA2134015A1 publication Critical patent/CA2134015A1/en
Application granted granted Critical
Publication of CA2134015C publication Critical patent/CA2134015C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0435—Details
    • H04Q11/0457—Connection protocols

Abstract

Method for automatically adapting and configuring the speed of a terminal adapter to the rate 56Kbps or 64Kbps which is used by a calling adapter. After the sending in the called terminal adapter of the CONNECT message which is sent to the ISDN NETWORK in accordance with CCITT Q.931 Recommendations, the called TA is initialized to a rate of 64 Kbps and then continuously transmits an alignment pattern ALL_ONES while starting a first timing process (T1). This first timing process will cause the called TA to switch to a 56Kbps speed if the 64 Kbps validation process does not succeed. The method then involves the step of checking the reception of a ALL_ZEROS pattern coming from said calling adapter (20) before the end of said first predetermined period (T1). If this case, a 64 Kbps validation process will be performed which comprises the checking whether a ALL_ONES pattern is received within a second period (T2), in which case the 64 Kbps rate configuration will be validated. On the contrary, if the ALL_ZEROS
pattern is not received at the end of the first period (T1), a 56 Kbps rate validation process is initiated which is based on the detection of a so-called 56 Kbps pattern within the data flow. The 56 Kbps pattern is defined as being a number of n bytes with the first bit of every byte being set to a one. Additionally, the 64Kbps validation process involves the checking of the continuous receiving of said ALL_ZEROS pattern during said first period (T1) as long as the ALL_ONES pattern is not yet received, and at the end of said first period (T1) validating the 64Kbps rate.
CA002134015A 1994-01-14 1994-10-21 Method for automatically adapting and configurating the speed of a terminal adapter to either 56kpbs or 64kbps in accordance of the actual transmission rate being used Expired - Fee Related CA2134015C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP94480006.9 1994-01-14
EP94480006A EP0667728B1 (en) 1994-01-14 1994-01-14 Method for automatically adapting and configuring the speed of an ISDN terminal adapter to either 56 KBPS or 64 KBPS

Publications (2)

Publication Number Publication Date
CA2134015A1 true CA2134015A1 (en) 1995-07-15
CA2134015C CA2134015C (en) 1998-01-20

Family

ID=8218110

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002134015A Expired - Fee Related CA2134015C (en) 1994-01-14 1994-10-21 Method for automatically adapting and configurating the speed of a terminal adapter to either 56kpbs or 64kbps in accordance of the actual transmission rate being used

Country Status (5)

Country Link
US (1) US5519703A (en)
EP (1) EP0667728B1 (en)
JP (1) JP2557205B2 (en)
CA (1) CA2134015C (en)
DE (1) DE69421512T2 (en)

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KR100222433B1 (en) * 1997-02-28 1999-10-01 윤종용 Configuration method of network interfacing circuits in isdn key telephone system
US6005846A (en) * 1997-05-07 1999-12-21 3Com Corporation Apparatus for an improved ISDN terminal adapter having automatic SPID configuration and methods for use therein
DE19749770A1 (en) * 1997-11-11 1999-05-12 Cit Alcatel Method for setting up a digital communication link, subscriber terminal and switching center
US6553518B1 (en) 1999-03-08 2003-04-22 International Business Machines Corporation Severe error detectors, methods and computer program products that use constellation specific error event thresholds to detect severe error events during demodulation of a signal comprising symbols from a plurality of symbol constellations
US6661847B1 (en) 1999-05-20 2003-12-09 International Business Machines Corporation Systems methods and computer program products for generating and optimizing signal constellations
US6792004B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of robbed-bit signaling based on proximity
US6967995B1 (en) 1999-10-29 2005-11-22 International Business Machines Corporation Methods, systems and computer program products for carrier drop detection using a variable threshold
US6823017B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Systems, methods and computer program products for filtering glitches from measured values in a sequence of code points
US6505222B1 (en) 1999-10-29 2003-01-07 International Business Machines Corporation Systems methods and computer program products for controlling undesirable bias in an equalizer
US6792040B1 (en) 1999-10-29 2004-09-14 International Business Machines Corporation Modems having a dual power mode capability and methods of operating same
US6754258B1 (en) 1999-10-29 2004-06-22 International Business Machines Corporation Systems, methods and computer program products for averaging learned levels in the presence of digital impairments based on patterns
US6839382B1 (en) 1999-10-29 2005-01-04 International Business Machines Corporation System, methods and computer program products for identifying digital impairments in modem signals using signature analysis and signal level comparison analysis
US6823004B1 (en) 1999-10-29 2004-11-23 International Business Machines Corporation Methods, systems and computer program products for monitoring performance of a modem during a connection
US6765955B1 (en) 1999-10-29 2004-07-20 International Business Machines Corporation Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise
US6816545B1 (en) 1999-10-29 2004-11-09 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modems based on clusters and/or skips in pulse code modulation signal levels
US6826157B1 (en) 1999-10-29 2004-11-30 International Business Machines Corporation Systems, methods, and computer program products for controlling data rate reductions in a communication device by using a plurality of filters to detect short-term bursts of errors and long-term sustainable errors
US6662322B1 (en) 1999-10-29 2003-12-09 International Business Machines Corporation Systems, methods, and computer program products for controlling the error rate in a communication device by adjusting the distance between signal constellation points
US6611563B1 (en) 1999-10-29 2003-08-26 International Business Machines Corporation Systems, methods and computer program products for data mode refinement of modem constellation points
US6650657B1 (en) 1999-10-29 2003-11-18 International Business Machines Corporation Systems, methods and computer program products for identifying digital impairments in modem signals
US20020194361A1 (en) * 2000-09-22 2002-12-19 Tomoaki Itoh Data transmitting/receiving method, transmitting device, receiving device, transmiting/receiving system, and program

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Publication number Priority date Publication date Assignee Title
US4931250A (en) * 1988-05-12 1990-06-05 Codex Corporation Multimode modem
JP2722347B2 (en) * 1988-07-11 1998-03-04 株式会社リコー Facsimile machine
US4956852A (en) * 1988-08-30 1990-09-11 Universal Data Systems, Inc. Method for remote configuration of a modem
JP2930624B2 (en) * 1989-11-17 1999-08-03 松下電送システム株式会社 Terminal equipment for ISDN
JPH04117067A (en) * 1990-06-11 1992-04-17 Fujitsu Ltd Facsimile terminal
DE69022411D1 (en) * 1990-06-29 1995-10-19 Ibm Method and device for the automatic setting of functional speed in a data terminal device.
FI905698A (en) * 1990-11-19 1992-05-20 Telenokia Oy DATAOEVERFOERINGSSYSTEM OCH ETT FOERFARANDE FOER KONTROLL AV KONTAKT VID DATAOEVERFOERINGSSYSTEMET.
JPH05136758A (en) * 1991-11-15 1993-06-01 Nec Corp Multiple speed converter
US5448560A (en) * 1992-12-23 1995-09-05 Itri V.110 communication protocol fractional rate adapter for an ISDN network

Also Published As

Publication number Publication date
DE69421512D1 (en) 1999-12-09
EP0667728B1 (en) 1999-11-03
JP2557205B2 (en) 1996-11-27
US5519703A (en) 1996-05-21
CA2134015C (en) 1998-01-20
EP0667728A1 (en) 1995-08-16
DE69421512T2 (en) 2000-05-18
JPH07221812A (en) 1995-08-18

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Legal Events

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