GB1182487A - Improvements in or relating to Communication Networks - Google Patents

Improvements in or relating to Communication Networks

Info

Publication number
GB1182487A
GB1182487A GB2932767A GB2932767A GB1182487A GB 1182487 A GB1182487 A GB 1182487A GB 2932767 A GB2932767 A GB 2932767A GB 2932767 A GB2932767 A GB 2932767A GB 1182487 A GB1182487 A GB 1182487A
Authority
GB
United Kingdom
Prior art keywords
signals
multiplex
call
exchange
transmission
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
GB2932767A
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of GB1182487A publication Critical patent/GB1182487A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J4/00—Combined time-division and frequency-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN
    • 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
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Abstract

1,182,487. Automatic exchange systems; multiplex transmission; multiplex pulse code signalling. NIPPON TELEGRAPH & TELEPHONE PUBLIC CORP. 26 June, 1967 [27 June, 1966], No. 29327/67. Headings H4K, H4L and H4R. In a telephone system the switching equipment has a broad band characteristic so as to be capable of passing broad band intelligence such as television as well as normal calls, and each call (or other transmission) is accompanied by signals specifying the type of modulation and band width of that transmission. P.C.M. and F.D.M. inter-exchange links can thus be interconnected to provide say an alternative inter-exchange route if a more direct route is busy. A group of trunks e.g. taken from an earlier switching stage may be used for a single call to provide an increased band width. The equipment shown is located at an intermediate exchange through which a call between subscribers in two other exchanges is to be routed. Signals arriving at the terminal 3 from the exchange of the calling subscriber specify the type of modulation, the channel on which a call will arrive, the band width necessary for the transmission and the numbers of the subscribers involved. Assuming the modulation is P.C.M., a register translator RTL and a marker MK enable a branching pulse generator to generate pulses coincident with the time slot or slots allotted to the call. Multiplex P.C.M. signals enter at terminal 1 and after a delay at D leave at terminal 2 via an inhibit gate. The circuit is synchronized with these signals by a framing circuit FRM and a timing pulse generator T1M. The pulses from the branching pulse generator B1PG enable the inhibit gate and an AND gate, causing the P.C.M. signals in that time slot to be deleted from the multiplex train and divided out through the " AND " gate. The individual pulses of the divided out pulse code are separated on to different lines and lengthened to fill all the time slots. Switching to a required output trunk can then take place through the switching network SWN purely on a space division basis and recoded and multiplex on an outgoing line. F.D.M. signals entering at 4 are separated on to individual channels at E and applied to the switching network where they are switched on a space division basis.
GB2932767A 1966-06-27 1967-06-26 Improvements in or relating to Communication Networks Expired GB1182487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4135466 1966-06-27

Publications (1)

Publication Number Publication Date
GB1182487A true GB1182487A (en) 1970-02-25

Family

ID=12606152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2932767A Expired GB1182487A (en) 1966-06-27 1967-06-26 Improvements in or relating to Communication Networks

Country Status (3)

Country Link
DE (1) DE1300152B (en)
FR (1) FR1513888A (en)
GB (1) GB1182487A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4789980A (en) * 1986-08-18 1988-12-06 American Telephone & Telegraph Company, At&T Bell Laboratories Switching techniques for FDM communication systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2241636A1 (en) * 1972-08-25 1974-03-07 Siemens Ag SIGNALING PROCEDURE IN TIME MULTIPLEX SWITCHING SYSTEMS
EP0276421B1 (en) * 1986-12-23 1991-10-09 Siemens Aktiengesellschaft Circuit arrangement for telecommunication exchanges, especially telephone exchanges, with a network of positions and connection bundles of channels starting therefrom, which can be individually occupied per connection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4789980A (en) * 1986-08-18 1988-12-06 American Telephone & Telegraph Company, At&T Bell Laboratories Switching techniques for FDM communication systems

Also Published As

Publication number Publication date
DE1300152B (en) 1969-07-31
FR1513888A (en) 1968-02-16

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years