GB1489741A - Telecommunication system networks - Google Patents

Telecommunication system networks

Info

Publication number
GB1489741A
GB1489741A GB3394173A GB3394173A GB1489741A GB 1489741 A GB1489741 A GB 1489741A GB 3394173 A GB3394173 A GB 3394173A GB 3394173 A GB3394173 A GB 3394173A GB 1489741 A GB1489741 A GB 1489741A
Authority
GB
United Kingdom
Prior art keywords
digital
check
receiving station
test
path
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
GB3394173A
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 GB3394173A priority Critical patent/GB1489741A/en
Publication of GB1489741A publication Critical patent/GB1489741A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

1489741 Testing telecommunication systems POST OFFICE 17 Oct 1974 [17 July 1973] 33941/73 Heading H4K To test the continuity of a two-way transmission link between an originating station and a receiving station, communication in each direction being along a respective two-wire path, the paths are intercoupled at the originating station to form a looped transmission link and, before intelligence is exchanged, a test signal is transmitted from the receiving station and its return over the loop is monitored at the receiving station. Typically, a check is made of a path set up between a calling subscriber connected to a concentrator/muliplexer 40/41 and a called subscriber on concentrator/multiplexer 45/46, the path being via a p.c.m. link 42, a digital switching subsystem (DSS) 44 with its associated group control (GC) 43, a trunk circuit 50 and similar integers 49, 48, 47. The check is made in three parts, as shown. To carry out the check, each GC includes a digital test tone sender (52) two digital receivers (53, 54) and associated switches, Fig. 11 (not shown). Preferably the test signal is in digital form and represents a tone in the speech frequency band.
GB3394173A 1974-10-17 1974-10-17 Telecommunication system networks Expired GB1489741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3394173A GB1489741A (en) 1974-10-17 1974-10-17 Telecommunication system networks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3394173A GB1489741A (en) 1974-10-17 1974-10-17 Telecommunication system networks

Publications (1)

Publication Number Publication Date
GB1489741A true GB1489741A (en) 1977-10-26

Family

ID=10359362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3394173A Expired GB1489741A (en) 1974-10-17 1974-10-17 Telecommunication system networks

Country Status (1)

Country Link
GB (1) GB1489741A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399775A1 (en) * 1977-08-05 1979-03-02 Int Standard Electric Corp CONTINUITY TEST DEVICE FOR TELECOMMUNICATIONS SYSTEM
FR2503511A1 (en) * 1981-04-03 1982-10-08 Cit Alcatel Digital switching system for telephonic auto-commutator - utilises microprocessor in marker unit to drive memory controller for buffer memories in switching network
GB2158326A (en) * 1984-04-26 1985-11-06 Standard Telephones Cables Ltd Testing arrangements of a digital switching systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2399775A1 (en) * 1977-08-05 1979-03-02 Int Standard Electric Corp CONTINUITY TEST DEVICE FOR TELECOMMUNICATIONS SYSTEM
FR2503511A1 (en) * 1981-04-03 1982-10-08 Cit Alcatel Digital switching system for telephonic auto-commutator - utilises microprocessor in marker unit to drive memory controller for buffer memories in switching network
GB2158326A (en) * 1984-04-26 1985-11-06 Standard Telephones Cables Ltd Testing arrangements of a digital switching systems

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Legal Events

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