GB1401627A - Testing for telecommunications switching systems - Google Patents

Testing for telecommunications switching systems

Info

Publication number
GB1401627A
GB1401627A GB5313771A GB5313771A GB1401627A GB 1401627 A GB1401627 A GB 1401627A GB 5313771 A GB5313771 A GB 5313771A GB 5313771 A GB5313771 A GB 5313771A GB 1401627 A GB1401627 A GB 1401627A
Authority
GB
United Kingdom
Prior art keywords
msu
subscriber
line
tdm highway
subscriber 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
GB5313771A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB5313771A priority Critical patent/GB1401627A/en
Publication of GB1401627A publication Critical patent/GB1401627A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/302—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
    • H04M3/303—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using PCM multiplexers, e.g. pair gain systems
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

1401627 Automatic exchange systems POST OFFICE 16 Feb 1973 [16 Nov 1971] 53137/71 Heading H4K In a telecommunication switching system in which a plurality of communication paths, e.g. subscriber lines 2, are connected to a switching centre, MSU, Fig. 1 (not shown), via a TDM highway 13, the MSU controls a testing arrangement 6, 19, 15 which applies a test signal to a selected path. In the embodiment of Fig. 2 each subscriber line has its own signalling unit (SU) 6 included in a concentrator 3. The SU is a transistor logic circuit, Fig. 5 (not shown), capable of applying, in response to the control signals, various test voltage conditions to the two wires of the subscriber line. Test results are transmitted to the MSU along the TDM highway. In particular the SU tests the line capacitance and is able by investigating decay characteristics to distinguish between a low insulation fault and a battery or earth contact fault. In a further embodiment, Fig. 3 (not shown), one SU is provided for each channel of the TDM highway and is connected to a selected subscriber line through an analogue switch. The SU may be arranged, on receiving suitable control signals, to ring a subscriber's bell, or to open the coin-slots on a coin-box line.
GB5313771A 1971-11-16 1971-11-16 Testing for telecommunications switching systems Expired GB1401627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5313771A GB1401627A (en) 1971-11-16 1971-11-16 Testing for telecommunications switching systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5313771A GB1401627A (en) 1971-11-16 1971-11-16 Testing for telecommunications switching systems

Publications (1)

Publication Number Publication Date
GB1401627A true GB1401627A (en) 1975-07-16

Family

ID=10466773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5313771A Expired GB1401627A (en) 1971-11-16 1971-11-16 Testing for telecommunications switching systems

Country Status (1)

Country Link
GB (1) GB1401627A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462833A1 (en) * 1979-07-27 1981-02-13 Northern Telecom Ltd LINE INTERFACE UNIT FOR SIGNAL COUPLING IN BAND AND BROADBAND FREQUENCY FREQUENCIES
WO1995034966A2 (en) * 1994-06-15 1995-12-21 Nokia Telecommunications Oy A subscriber multiplexer, a telephone system and a method for communicating the condition of a subscriber interface
FR2762744A1 (en) * 1997-04-25 1998-10-30 France Telecom Test procedure for digital telephone subscriber lines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462833A1 (en) * 1979-07-27 1981-02-13 Northern Telecom Ltd LINE INTERFACE UNIT FOR SIGNAL COUPLING IN BAND AND BROADBAND FREQUENCY FREQUENCIES
WO1995034966A2 (en) * 1994-06-15 1995-12-21 Nokia Telecommunications Oy A subscriber multiplexer, a telephone system and a method for communicating the condition of a subscriber interface
WO1995034966A3 (en) * 1994-06-15 1996-02-08 Nokia Telecommunications Oy A subscriber multiplexer, a telephone system and a method for communicating the condition of a subscriber interface
AU693570B2 (en) * 1994-06-15 1998-07-02 Nokia Telecommunications Oy A subscriber multiplexer, a telephone system and a method for communicating the condition of a subscriber interface
US5974030A (en) * 1994-06-15 1999-10-26 Nokia Telecommunications Oy Subscriber multiplexer, a telephone system and a method for communicating the condition of a subcriber interface
FR2762744A1 (en) * 1997-04-25 1998-10-30 France Telecom Test procedure for digital telephone subscriber lines

Similar Documents

Publication Publication Date Title
GB1114522A (en) Analogue signal transmission system
GB1401627A (en) Testing for telecommunications switching systems
ES361299A1 (en) Telecommunication switching systems
GB1296406A (en)
GB1444919A (en) Telecommunication switching systems wiring harnesses for buildings
US2806088A (en) Communication system
US4054760A (en) Remote testing of telephone loops
GB722172A (en) Improvements in or relating to automatic telephone exchange systems
US3391253A (en) Multiparty ringing selection circuit
GB660726A (en) Improvements in or relating to automatic signal systems
SE309437B (en)
GB1456250A (en) Matrix control circuit
GB1287137A (en) Monitoring apparatus for detecting faults in the line circuits of time division telephone exchanges
GB1078297A (en) Circuit arrangement for testing switching circuits and/or lines with regard to their engaged condition, in tele-communication systems, particularly in telephone exchange systems
GB776026A (en) Traffic supervisory arrangements in telephone systems
GB1101022A (en) Circuit arrangement to establish testing connections in telecommunication, particularly telephone exchange systems which have switching grids, controlled by markers
JPS57119585A (en) Remote control system for subscriber information file
GB1369669A (en) Line circuits for communication systems
US3697704A (en) Circuits for private automatic telephone exchange systems
GB772735A (en) Improved arrangement for tracing connections in switching networks
JPS57157671A (en) Automatic testing system for subscriber's circuit
IL48110A (en) Switches for use in wired broadcasting systems
US2389290A (en) Telephone system
EP0211261A3 (en) Method for automatically testing a communication system, especially a private branch exchange
GB1001846A (en) Improvements in or relating to time-division multiplex telecommunications systems

Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19930214