AU5786280A - Digital telephone system - Google Patents

Digital telephone system

Info

Publication number
AU5786280A
AU5786280A AU57862/80A AU5786280A AU5786280A AU 5786280 A AU5786280 A AU 5786280A AU 57862/80 A AU57862/80 A AU 57862/80A AU 5786280 A AU5786280 A AU 5786280A AU 5786280 A AU5786280 A AU 5786280A
Authority
AU
Australia
Prior art keywords
lines
pcm
subscriber
line
signals
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.)
Abandoned
Application number
AU57862/80A
Inventor
Not Given Name
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.)
Tenovis GmbH and Co KG
Original Assignee
Telefonbau und Normalzeit GmbH
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 Telefonbau und Normalzeit GmbH filed Critical Telefonbau und Normalzeit GmbH
Publication of AU5786280A publication Critical patent/AU5786280A/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • 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

Abstract

1. Method of operating digital main terminals (H) and/or branch exchanges (NST) connected to a PCM exchange (V), whereby the subscribers lines (AL) are connected with line distributors (LVZ) each having a line circuit (LE) as interface to the PCM-line system (LS) for the connection with the exchange (V) and the time slots of the PCM-line system are distributed by a demultiplexer and the contained information is retransmitted to the concerning subscriber's lines (AL) and the incoming information on the subscriber's lines (AL) is retransmitted via the concerning time slots of the PCM-line system by a multiplexer, and additional equipment (for example second telephone station (Z), extensions (N), etc) is connected via internal terminal lines (IAL) with the main terminals (H) and/or branch exchanges (NST) of the subscriber's lines (AL), and all information coming in on the subscribers line (AL) is retransmitted on the internal terminal line (IAL) and vice versa, whereby on the subscriber's lines (AL) data words are transmitted each consisting of a PCM-word and additional bit for the transmission of additional information (for example synchronisation signals, signalling signals, metering pulses, etc) and the bit rate on the subscriber lines (AL) is higher than the normal transmission rate on the one or multiple channel PCM-lines and the signalling signals are transmitted via the PCM-line system (LS) in both directions in the respective signalling time slots whereas the synchronisation signals of the subscriber's lines (AL) are excluded from the transmission on the PCM-line system (LS), characterized in, that the same frame format is used both on the subscriber's lines (AL) and the internal terminal line, whereby the additional bit are provided for the transmission of internal signalling signals (I), external signalling signals (E), synchronisation signals (S, ES, IS) and one additional service channel (D) on the subscriber's lines (AL) and the internal terminals lines (IAL), whereby the internal signalling signals (I) which are being used exclusively on the internal terminal line (IAL) and the synchronisation signals (S, ES, IS) are excluded from the retransmission to the exchange (V) in the line distributor (LVZ), whereas the service channel (D) is transposed to a time slot of the PCM-line system (LS) and vice versa.
AU57862/80A 1979-04-30 1980-04-29 Digital telephone system Abandoned AU5786280A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29175722 1979-04-30
DE2917572A DE2917572C2 (en) 1979-04-30 1979-04-30 Method for operating digital main lines and / or private branch exchanges at a PCM exchange

Publications (1)

Publication Number Publication Date
AU5786280A true AU5786280A (en) 1980-11-06

Family

ID=6069684

Family Applications (1)

Application Number Title Priority Date Filing Date
AU57862/80A Abandoned AU5786280A (en) 1979-04-30 1980-04-29 Digital telephone system

Country Status (5)

Country Link
EP (1) EP0018526B1 (en)
AT (1) ATE4364T1 (en)
AU (1) AU5786280A (en)
DE (1) DE2917572C2 (en)
IE (1) IE50017B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU572872B2 (en) * 1983-08-11 1988-05-19 Societe Anonyme Dite Compagnie Industrielle Des Telecommunications Cit-Alcatel Digital satellite exchange

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930420B1 (en) * 1979-07-26 1980-10-09 Siemens Ag Digital telecommunications system
EP0024617A1 (en) * 1979-08-24 1981-03-11 Siemens Aktiengesellschaft Digital telecommunication system
DE3405011C1 (en) * 1984-02-13 1989-03-16 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for operating two-wire digital connection and/or junction lines on a telecommunications switching system
SU1547671A1 (en) * 1988-07-20 1991-09-07 Предприятие П/Я Р-6609 Digital commutating systems
DK0583368T3 (en) * 1991-05-09 1999-09-13 Ericsson Raynet Method and apparatus for translating signal information
US5528579A (en) * 1993-06-11 1996-06-18 Adc Telecommunications, Inc. Added bit signalling in a telecommunications system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643703A1 (en) * 1976-09-28 1978-03-30 Siemens Ag PCM TDM telephone network - has two=wire multiplexed line operated in four-wire mode and with memories and CODEC

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU572872B2 (en) * 1983-08-11 1988-05-19 Societe Anonyme Dite Compagnie Industrielle Des Telecommunications Cit-Alcatel Digital satellite exchange

Also Published As

Publication number Publication date
DE2917572C2 (en) 1981-04-09
EP0018526A1 (en) 1980-11-12
IE50017B1 (en) 1986-02-05
DE2917572B1 (en) 1980-07-31
ATE4364T1 (en) 1983-08-15
EP0018526B1 (en) 1983-07-27
IE800875L (en) 1980-10-30

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