GB1489743A - Telecommunication system networks - Google Patents

Telecommunication system networks

Info

Publication number
GB1489743A
GB1489743A GB1535877A GB1535877A GB1489743A GB 1489743 A GB1489743 A GB 1489743A GB 1535877 A GB1535877 A GB 1535877A GB 1535877 A GB1535877 A GB 1535877A GB 1489743 A GB1489743 A GB 1489743A
Authority
GB
United Kingdom
Prior art keywords
telecommunication system
system networks
speech
traversal
heading
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
GB1535877A
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 GB1535877A priority Critical patent/GB1489743A/en
Publication of GB1489743A publication Critical patent/GB1489743A/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)
  • Time-Division Multiplex Systems (AREA)

Abstract

1489743 Testing speech transmission paths POST OFFICE 17 Oct 1974 [17 July 1973] 15358/77 Divided out of 1489741 Heading H4K The description is substantially the same as that of parent Specification 1,489,741, but the claims are concerned with the fact that the test signal is in digital form and comprises an encoded test tone within the speech frequency band, thereby facilitating its traversal of any analog speech path in the system.
GB1535877A 1974-10-17 1974-10-17 Telecommunication system networks Expired GB1489743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1535877A GB1489743A (en) 1974-10-17 1974-10-17 Telecommunication system networks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1535877A GB1489743A (en) 1974-10-17 1974-10-17 Telecommunication system networks

Publications (1)

Publication Number Publication Date
GB1489743A true GB1489743A (en) 1977-10-26

Family

ID=10057767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1535877A Expired GB1489743A (en) 1974-10-17 1974-10-17 Telecommunication system networks

Country Status (1)

Country Link
GB (1) GB1489743A (en)

Cited By (2)

* 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
EP0003448A1 (en) * 1978-01-20 1979-08-08 Thomson-Csf Space-time division connection network

Cited By (2)

* 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
EP0003448A1 (en) * 1978-01-20 1979-08-08 Thomson-Csf Space-time division connection network

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Legal Events

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