GB1538814A - Method of monitoring parts of a multiplexer/demultiplexer unit - Google Patents

Method of monitoring parts of a multiplexer/demultiplexer unit

Info

Publication number
GB1538814A
GB1538814A GB3993277A GB3993277A GB1538814A GB 1538814 A GB1538814 A GB 1538814A GB 3993277 A GB3993277 A GB 3993277A GB 3993277 A GB3993277 A GB 3993277A GB 1538814 A GB1538814 A GB 1538814A
Authority
GB
United Kingdom
Prior art keywords
time
switching unit
division multiplex
channel
multiplex line
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.)
Expired
Application number
GB3993277A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1538814A publication Critical patent/GB1538814A/en
Expired 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
    • 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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

Demultiplexer/multiplexer units which are connected to a switching unit of a PCM exchange via a PCM time-division multiplex line can have the task of distributing data or signal channels transmitted via the time-division multiplex line to the connected channel-individual device or combining signals received from there for transmission in the opposite direction or can be used for distributing digital information supplied in time-division multiplex to audio-frequency connections or to combine this information from there on the time-division multiplex line. The central parts are then monitored by the value of a certain time channel being forwarded, for locking the channel counter with the frame alignment word sent by the switching unit, via the central parts (FZ, LS) to the decentralised function part (FDO) allocated to this time channel and being sent back in the opposite direction of transmission, after reflection, to the frame detection circuit (RED) of the switching unit. For outputting error messages to the central processor, due to a missing or erroneously received frame alignment word, the signalling paths existing between the central processor and the switching unit are utilised. <IMAGE>
GB3993277A 1976-09-30 1977-09-26 Method of monitoring parts of a multiplexer/demultiplexer unit Expired GB1538814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762644248 DE2644248C3 (en) 1976-09-30 1976-09-30 Method for monitoring the central parts of a demultiplexer / multiplexer unit

Publications (1)

Publication Number Publication Date
GB1538814A true GB1538814A (en) 1979-01-24

Family

ID=5989368

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3993277A Expired GB1538814A (en) 1976-09-30 1977-09-26 Method of monitoring parts of a multiplexer/demultiplexer unit

Country Status (6)

Country Link
AT (1) AT359566B (en)
CH (1) CH623438A5 (en)
DE (1) DE2644248C3 (en)
FR (1) FR2366765A1 (en)
GB (1) GB1538814A (en)
IT (1) IT1087055B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003282C2 (en) * 1980-01-30 1986-11-27 Siemens AG, 1000 Berlin und 8000 München Method for testing set connections of a switching center of a digital time division multiplex telecommunications network, as well as, if necessary, the lines connected to the switching center
US4592044A (en) * 1984-05-22 1986-05-27 At&T Information Systems Inc. Apparatus and method for checking time slot integrity of a switching system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1271209B (en) * 1965-12-03 1968-06-27 Siemens Ag Method for functional testing of connecting switching elements and routes in telecommunications, in particular telephone switching systems
CH495094A (en) * 1968-08-12 1970-08-15 Standard Telephon & Radio Ag Method for monitoring the operation of encoder and decoder circuits in a PCM time division multiplex system
ES430741A1 (en) * 1973-10-05 1976-10-01 Standard Electrica Sa A proof of device for a commutation mesh by division of time. (Machine-translation by Google Translate, not legally binding)
FR2252711A1 (en) * 1973-11-27 1975-06-20 Cit Alcatel Surveillance of multiplexed pulse code telephonic signals - is enabled by test word loop between coder and decoder

Also Published As

Publication number Publication date
DE2644248B2 (en) 1980-07-31
CH623438A5 (en) 1981-05-29
ATA694277A (en) 1980-04-15
FR2366765B1 (en) 1982-04-23
AT359566B (en) 1980-11-25
DE2644248A1 (en) 1978-04-06
DE2644248C3 (en) 1981-03-26
FR2366765A1 (en) 1978-04-28
IT1087055B (en) 1985-05-31

Similar Documents

Publication Publication Date Title
US5058104A (en) Tdm demultiplexer with dedicated maintenance channels to indicate high-speed line faults to low speed circuits
US3214734A (en) Protection signalling system having channel impedance alteration means for providing indications of remote station conditions
KR900013741A (en) Fault diagnosis device
GB1269555A (en) Improvements in or relating to communication systems
US4451917A (en) Method and apparatus for pulse train synchronization in PCM transceivers
KR860000761A (en) Digital Linkage Device for Telephone Station Operation Set
KR870001714A (en) Remote Digital Carrier Alert and Terminal By-pass System
US4551830A (en) Apparatus for providing loopback of signals where the signals being looped back have an overhead data format which is incompatible with a high speed intermediate carrier overhead format
GB1538814A (en) Method of monitoring parts of a multiplexer/demultiplexer unit
JPS6224737A (en) Apparatus for generating signaling signal for unconnected transmission section of digital transmission system
SU608493A3 (en) Time switching device for multichannel communication systems with time-division multiplex
GB1337143A (en) Time division multiple access communication systesm
JPS56157162A (en) Inter-office monitor signal bit holding system
JPS5440010A (en) Centralized monitor system for digital transmission network
JPS645139A (en) Line monitor system
KR100279163B1 (en) Channel unit for digital loop carrier transmission system
FR2399162A1 (en) Faults detection device in multiplexed data transmission network - utilises test unit to determine functional condition of channel
JP2919068B2 (en) Line failure collection method
JPS57160236A (en) Multiple transmission system for vehicle
JP2821338B2 (en) Secondary alarm output control method
SU773931A1 (en) Multi-channel switching device
JPS5441002A (en) Data signal control system
KR980007332A (en) Fault detection device of bus system in exchange
KR910002626B1 (en) Disable state detecting circuit of the opposite system
JP2825049B2 (en) High-efficiency line diagnosis method

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee