GB1391840A - Telecommunications systems - Google Patents
Telecommunications systemsInfo
- Publication number
- GB1391840A GB1391840A GB2331472A GB2331472A GB1391840A GB 1391840 A GB1391840 A GB 1391840A GB 2331472 A GB2331472 A GB 2331472A GB 2331472 A GB2331472 A GB 2331472A GB 1391840 A GB1391840 A GB 1391840A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exchange
- channels
- signal
- special
- seizable
- 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
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)
- Small-Scale Networks (AREA)
Abstract
1391840 Automatic exchange systems SIEMENS AG 18 May 1972 [18 May 1971] 23314/72 Heading H4K In a telecommunications system in which data signals relating to speech channels are transmitted in special transmission channels between a pair of exchanges which are connected to one another via a P.C.M. transmission link, a number of the special transmission channels are seizable from either exchange. Two exchanges AB are coupled by two 32 channel P.C.M. links L1, L2, one for each direction of transmission. Thirty channels in each link are reserved for speech communication, one for synchronization purposes, and the final one for transmission of data signals. The time slot of this channel may be divided into two parts to provide two special transmission channels per frame for transmission of data signals relating to two of the speech channels. Data signals relating to the 30 speech channels are therefore transmitted in sequence over fifteen frames and in this sense 30 special transmission channels are provided. Each of the thirty special transmission channels has associated with it at each exchange a signal translator which is coupled to either the incoming (SAan or SBan) or outgoing (SAab or SBab) switching stage of the respective exchange, the term channel being used to cover the arrangement of an outgoing channel in P.C.M. link L1 (L2) paired with a corresponding incoming channel in P.C.M. link L2 (L1). Ten of the special channels are seizable only from exchange A and have associated therewith 10 signal translators represented by K1Aa and K2Aab at exchange A and 10 signal translators represented by K1Ban and K2Ban at exchange B, these 20 signal translators being seizable only from exchange A. Likewise there are provided 10 special channels seizable only from exchange B and having associated therewith 20 signal translators, seizable only from exchange B, represented by K1Bab and K2Bab at exchange B and by K1Aan and K2Aan at exchange A. The further 10 special channels each have associated therewith a pair of signal translators at each exchange, one signal translator of each pair being seizable from exchange A and the other of each pair being seizable from exchange B. The figure shows the signal translators K3Aab, K3Aan, K3Bab, K3Ban associated with one of these 10 special channels together with change over switches S3A, S3B associated therewith, the arrangement rendering these channels seizable by either exchange as follows. Assuming a call is being established from exchange A and that exchange A has already in use all the 10 special channels allotted thereto, one of the 10 outgoing signal translators such as K3Aab associated with one of the 10 further special channels seizable from either exchange, is seized provided all 10 such channels are not already in use. In the idle state of these special channels the change over switches S3A, S3B are switched to connect the signal translator seizable by the exchange in which it is situated to a respective distribution arrangement KVA, KVB which connects the output of the signal translator to the P.C.M. link outgoing from the respective exchange during the ¢ time slot in the frame allotted to the particular special channel in the sequence of 15 frames. In this particular case the output of signal translator K3Aab is connected via P.C.M. link L1 to the input of a change over switch S3B and a change over switch actuating device BStb. The data signal transmitted will include at the beginning thereof a signal that will cause the switch actuating device BStb to operate the change over switch S3B to connect signal translator K3Ban to the distribution arrangement KVB and this signal translator is then seized by exchange A. Once seized the signal translators are capable of relaying signals in either direction, and once data signals have been received by exchange B from exchange A via switching stage SAab, translator K3Aab, P.C.M. link L1, translator K3Ban and switching stage SBan a backwards acknowledgement signal will be transmitted via switching stage SBan, translator K3Ban, P.C.M. link L2, translator K3Aab and switching stage SAab. Means are provided for preventing seizure of a special channel by both exchange simultaneously The P.C.M. interexchange links may be transmission lines or radio links.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712124673 DE2124673C3 (en) | 1971-05-18 | 1971-05-18 | Circuit arrangement for the transmission of associated data signals, in particular data signals formed by switching indicators, via a PCM transmission link |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1391840A true GB1391840A (en) | 1975-04-23 |
Family
ID=5808253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2331472A Expired GB1391840A (en) | 1971-05-18 | 1972-05-18 | Telecommunications systems |
Country Status (10)
Country | Link |
---|---|
BE (1) | BE783665A (en) |
CH (1) | CH548140A (en) |
DE (1) | DE2124673C3 (en) |
FR (1) | FR2138014B1 (en) |
GB (1) | GB1391840A (en) |
IT (1) | IT955596B (en) |
LU (1) | LU65372A1 (en) |
NL (1) | NL7206673A (en) |
NO (1) | NO134506C (en) |
SE (1) | SE370843B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2164821A (en) * | 1984-09-21 | 1986-03-26 | Int Standard Electric Corp | Digital tie line |
-
1971
- 1971-05-18 DE DE19712124673 patent/DE2124673C3/en not_active Expired
-
1972
- 1972-04-26 CH CH621972A patent/CH548140A/en not_active IP Right Cessation
- 1972-05-12 NO NO169272A patent/NO134506C/no unknown
- 1972-05-16 LU LU65372D patent/LU65372A1/xx unknown
- 1972-05-17 NL NL7206673A patent/NL7206673A/xx not_active Application Discontinuation
- 1972-05-17 FR FR7217614A patent/FR2138014B1/fr not_active Expired
- 1972-05-17 IT IT2444872A patent/IT955596B/en active
- 1972-05-18 BE BE783665A patent/BE783665A/en unknown
- 1972-05-18 SE SE654472A patent/SE370843B/xx unknown
- 1972-05-18 GB GB2331472A patent/GB1391840A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2164821A (en) * | 1984-09-21 | 1986-03-26 | Int Standard Electric Corp | Digital tie line |
US4641300A (en) * | 1984-09-21 | 1987-02-03 | Itt Corporation | Digital tie line |
Also Published As
Publication number | Publication date |
---|---|
NO134506B (en) | 1976-07-12 |
DE2124673C3 (en) | 1974-10-24 |
NO134506C (en) | 1976-10-20 |
DE2124673A1 (en) | 1972-12-07 |
FR2138014B1 (en) | 1973-07-13 |
NL7206673A (en) | 1972-11-21 |
CH548140A (en) | 1974-04-11 |
FR2138014A1 (en) | 1972-12-29 |
IT955596B (en) | 1973-09-29 |
LU65372A1 (en) | 1972-08-23 |
SE370843B (en) | 1974-10-28 |
BE783665A (en) | 1972-11-20 |
DE2124673B2 (en) | 1974-03-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4322843A (en) | Control information communication arrangement for a time division switching system | |
ES407164A1 (en) | Time division switching system | |
CA1207924A (en) | Control information communication arrangement for a time division switching system | |
GB1084001A (en) | Improvements in or relating to switching networks | |
US4472798A (en) | Telecommunication path substitution arrangement | |
GB1391840A (en) | Telecommunications systems | |
JPS645153A (en) | Private line connection system | |
US4309572A (en) | Call processing system with an operator assistance in a telephone switching system | |
US4559624A (en) | Digital concentrator | |
KR840002347B1 (en) | Digital telephonic communication system | |
GB1340268A (en) | Tdm telecommunications exchange systems | |
ZA801518B (en) | A telecommunications switching network | |
GB1182487A (en) | Improvements in or relating to Communication Networks | |
JPS57132466A (en) | Control system for exclusive line | |
JPS56119564A (en) | Key telephone system | |
GB1351497A (en) | System for making telecommunication connections between dialable subscribers | |
JPS63187857A (en) | Digital exchange network | |
JPS57112167A (en) | Conference communication system for loop switching network | |
GB1464634A (en) | Coupling devices for connection between pam multiplex telephone exchanges and pcm multiplex transmission systems | |
GB1118589A (en) | Improvements in or relating to telecommunications systems | |
GB1384413A (en) | Tdm telecommunications exchange systems | |
GB987475A (en) | Mobile cordless switchboard | |
ES431867A1 (en) | A system of intercommunication series with a central control. (Machine-translation by Google Translate, not legally binding) | |
GB1274960A (en) | Improvements in or relating to time-division multiplex telecommunications exchange systems | |
ES384718A2 (en) | Improvements in or relating to telecommunication exchanges |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |