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FR2252711A1 - Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder - Google Patents

Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder

Info

Publication number
FR2252711A1
FR2252711A1 FR7342156A FR7342156A FR2252711A1 FR 2252711 A1 FR2252711 A1 FR 2252711A1 FR 7342156 A FR7342156 A FR 7342156A FR 7342156 A FR7342156 A FR 7342156A FR 2252711 A1 FR2252711 A1 FR 2252711A1
Authority
FR
France
Prior art keywords
coder
decoder
pulse code
surveillance
enabled
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
FR7342156A
Other languages
French (fr)
Other versions
FR2252711B1 (en
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.)
Alcatel CIT SA
Nokia Inc
Original Assignee
Alcatel CIT SA
Nokia Inc
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 Alcatel CIT SA, Nokia Inc filed Critical Alcatel CIT SA
Priority to FR7342156A priority Critical patent/FR2252711A1/en
Publication of FR2252711A1 publication Critical patent/FR2252711A1/en
Application granted granted Critical
Publication of FR2252711B1 publication Critical patent/FR2252711B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • H04J3/125—One of the channel pulses or the synchronisation pulse is also used for transmitting monitoring or supervisory signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

The surveillance of multiplexed pulse code telephonic signals is enabled by the inclusion of a test loop between the coder and decoder which detects fault conditions which affect conversation quality. A multiplexed pulse code communication circuit comprises a number of transmission channels (V1-V30) with the corresponding reception channels. These channels are connected to a sampling and multiplexing circuit (10) and demultiplexer (21) respectively. A coder (11) between the multiplexer (10) and external connection (16e) is connected to a memory (37) to a enable reconstitution of the test word which is generated by a word generator (30). The test word is passed into the reception channels through a digital to analogue decoder (20) and the transmitted and receive test words are compared (32) before being passed to a logic alarm circuit (38).
FR7342156A 1973-11-27 1973-11-27 Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder Granted FR2252711A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7342156A FR2252711A1 (en) 1973-11-27 1973-11-27 Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7342156A FR2252711A1 (en) 1973-11-27 1973-11-27 Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder

Publications (2)

Publication Number Publication Date
FR2252711A1 true FR2252711A1 (en) 1975-06-20
FR2252711B1 FR2252711B1 (en) 1976-10-01

Family

ID=9128317

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7342156A Granted FR2252711A1 (en) 1973-11-27 1973-11-27 Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder

Country Status (1)

Country Link
FR (1) FR2252711A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366765A1 (en) * 1976-09-30 1978-04-28 Siemens Ag PROCEDURE FOR CONTROLLING THE CENTRAL PARTS OF A DEMULTIPLEXING / MULTIPLEXING UNIT
US4279032A (en) * 1979-04-26 1981-07-14 Bell Telephone Laboratories, Incorporated Channel bank loop-around test arrangement and method
EP0089063A3 (en) * 1982-03-17 1984-12-05 Siemens Aktiengesellschaft Process and device for monitoring a pmc coder-decoder device
EP0163288A1 (en) * 1984-05-29 1985-12-04 Siemens Aktiengesellschaft Method for testing switched connexions of a multiplex space division switching network
EP0193967A1 (en) * 1985-03-08 1986-09-10 Siemens Aktiengesellschaft Method for connection-testing of a broad-band switching network
EP0198203A1 (en) * 1985-03-08 1986-10-22 Siemens Aktiengesellschaft Method for connection-testing of a broad-band switching network
US4631719A (en) * 1984-04-13 1986-12-23 Rockwell International Corporation Channel looping apparatus for failure analysis

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366765A1 (en) * 1976-09-30 1978-04-28 Siemens Ag PROCEDURE FOR CONTROLLING THE CENTRAL PARTS OF A DEMULTIPLEXING / MULTIPLEXING UNIT
US4279032A (en) * 1979-04-26 1981-07-14 Bell Telephone Laboratories, Incorporated Channel bank loop-around test arrangement and method
EP0089063A3 (en) * 1982-03-17 1984-12-05 Siemens Aktiengesellschaft Process and device for monitoring a pmc coder-decoder device
US4631719A (en) * 1984-04-13 1986-12-23 Rockwell International Corporation Channel looping apparatus for failure analysis
EP0163288A1 (en) * 1984-05-29 1985-12-04 Siemens Aktiengesellschaft Method for testing switched connexions of a multiplex space division switching network
EP0193967A1 (en) * 1985-03-08 1986-09-10 Siemens Aktiengesellschaft Method for connection-testing of a broad-band switching network
EP0198203A1 (en) * 1985-03-08 1986-10-22 Siemens Aktiengesellschaft Method for connection-testing of a broad-band switching network

Also Published As

Publication number Publication date
FR2252711B1 (en) 1976-10-01

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Legal Events

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