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IE800875L - Digital telephone system - Google Patents

Digital telephone system

Info

Publication number
IE800875L
IE800875L IE800875A IE87580A IE800875L IE 800875 L IE800875 L IE 800875L IE 800875 A IE800875 A IE 800875A IE 87580 A IE87580 A IE 87580A IE 800875 L IE800875 L IE 800875L
Authority
IE
Ireland
Prior art keywords
lines
pcm
subscriber
line
signals
Prior art date
Application number
IE800875A
Other versions
IE50017B1 (en
Original Assignee
Telefonbau & 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 & Normalzeit Gmbh filed Critical Telefonbau & Normalzeit Gmbh
Publication of IE800875L publication Critical patent/IE800875L/en
Publication of IE50017B1 publication Critical patent/IE50017B1/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Prepayment Telephone Systems (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephonic Communication Services (AREA)

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.
IE875/80A 1979-04-30 1980-04-29 Digital telephone system IE50017B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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 (2)

Publication Number Publication Date
IE800875L true IE800875L (en) 1980-10-30
IE50017B1 IE50017B1 (en) 1986-02-05

Family

ID=6069684

Family Applications (1)

Application Number Title Priority Date Filing Date
IE875/80A IE50017B1 (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)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2930420C2 (en) * 1979-07-26 1988-12-01 Siemens AG, 1000 Berlin und 8000 München Digital telecommunications system
EP0024617A1 (en) * 1979-08-24 1981-03-11 Siemens Aktiengesellschaft Digital telecommunication system
FR2550678B1 (en) * 1983-08-11 1989-02-17 Cit Alcatel DIGITAL SATELLITE CENTER FOR CONNECTING SUBSCRIBERS
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
JPH06507527A (en) * 1991-05-09 1994-08-25 レイネット・コーポレイション Method and apparatus for converting into 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

Also Published As

Publication number Publication date
DE2917572C2 (en) 1981-04-09
ATE4364T1 (en) 1983-08-15
DE2917572B1 (en) 1980-07-31
EP0018526A1 (en) 1980-11-12
EP0018526B1 (en) 1983-07-27
IE50017B1 (en) 1986-02-05
AU5786280A (en) 1980-11-06

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