GB1411056A - Message transmission system for a multi-branched network - Google Patents
Message transmission system for a multi-branched networkInfo
- Publication number
- GB1411056A GB1411056A GB853573A GB853573A GB1411056A GB 1411056 A GB1411056 A GB 1411056A GB 853573 A GB853573 A GB 853573A GB 853573 A GB853573 A GB 853573A GB 1411056 A GB1411056 A GB 1411056A
- Authority
- GB
- United Kingdom
- Prior art keywords
- station
- devices
- codes
- line
- time slot
- 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
- H04J3/24—Time-division multiplex systems in which the allocation is indicated by an address the different channels being transmitted sequentially
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
- H04J3/0626—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers plesiochronous multiplexing systems, e.g. plesiochronous digital hierarchy [PDH], jitter attenuators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1623—Plesiochronous digital hierarchy [PDH]
- H04J3/1647—Subrate or multislot multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/24—Time-division multiplex systems in which the allocation is indicated by an address the different channels being transmitted sequentially
- H04J3/245—Time-division multiplex systems in which the allocation is indicated by an address the different channels being transmitted sequentially in which the allocation protocols between more than two stations share the same transmission medium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/403—Bus networks with centralised control, e.g. polling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
- H04M9/022—Multiplex systems
- H04M9/025—Time division multiplex systems, e.g. loop systems
Abstract
1411056 Automatic exchange systems LICENTIA PATENT-VERWALTUNGS GmbH 21 Feb 1973 [22 Feb 1972 23 Feb 1972] 8535/73 Headings H4K and H4P A communication system comprises a multibranch two wire line to which subscriber stations are connected, a unit adapted to apply a synchronizing code to one wire of the line and means at the end of each branch to transfer the code to the other wire of that branch, each station being adapted to divide the period between synchronizing codes into time slots usable for message transmission. In one embodiment shown the stations which include telephone substations 2, data devices 6, picture devices 7, telex units 8 and display devices 71, data bank 4 and computer 9 are connected as shown to the line having a main branch extending between the synchronizing unit 3 and a terminating device 32, and side branches terminated at 10. All terminating devices couple the synchronizing codes on the send line SL to the receive line EL. The terminating devices 10 absorb without reflection any message code while the terminating device 32 couples these codes received on line SL to the receive line EL. Each time slot is divided into two portions. To initiate a call a calling station must first select an idle time slot. This can be effected by monitoring the time slots on the receive channel until a free slot is found and using the known loop delay associated with that station's branch of the line, (which may be the same throughout the system if the devices 10 have appropriate delays, Fig. 10, not shown) the transmit time slot to be used may be calculated, or determined by transmitting test codes round the system, measuring the delay incurred and retiming the transmission in accordance with the delay, each branch point of the system being adapted to intermediately store these codes until an outgoing time slot in each outgoing branch is available. To call the wanted station B the calling station A transmits the wanted station identity B followed by its one identity A in a selected time slot. If the wanted station is free it selects a free time slot for the return transmission and transmits the two identities in the reverse order i.e. (B, A). The calling station responds transmitting (B, B) which causes ringing to be effected at the station B. When station B answers both stations transmit the other station identity followed by a message code. The wanted station identity need not be sent once the connection is established. In another embodiment (Fig. 1, not shown) the terminating device 32 is identical with the devices 10 and every station transmits and receives on both lines of the pair. In both embodiments the branching devices 5 absorb synchronizing codes after reflection at the terminating devices 10 and 32 and are equipped if necessary to effect intermediate storage of the codes for time slot synchronization and/or storage until a free slot can be found. The branching devices may include slave synchronizing devices which take over if the main device fails and may be adapted to transmit codes only to appropriate branches discriminating using the addresses transmitted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722208159 DE2208159B2 (en) | 1972-02-22 | 1972-02-22 | MESSAGE TRANSMISSION SYSTEM FOR A MULTIPLE RICHED NETWORK |
DE19722208396 DE2208396C3 (en) | 1972-02-22 | 1972-02-23 | Time multiplex messaging system, especially for PCM |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1411056A true GB1411056A (en) | 1975-10-22 |
Family
ID=25762750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB853573A Expired GB1411056A (en) | 1972-02-22 | 1973-02-21 | Message transmission system for a multi-branched network |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS4898711A (en) |
AT (1) | AT330851B (en) |
CA (2) | CA1003134A (en) |
CH (1) | CH554114A (en) |
DE (2) | DE2208159B2 (en) |
FR (1) | FR2173134B1 (en) |
GB (1) | GB1411056A (en) |
IT (1) | IT979021B (en) |
NL (1) | NL7302344A (en) |
SE (1) | SE389590B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2130847A (en) * | 1982-09-22 | 1984-06-06 | Fujitsu Ltd | The timing of reception and transmission channels in communications systems |
GB2149626A (en) * | 1983-10-27 | 1985-06-12 | Otis Elevator Co | Communications system |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2208587A5 (en) * | 1972-11-29 | 1974-06-21 | Ibm France | |
DE2324854B2 (en) * | 1973-05-17 | 1981-04-23 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Method for directed message transmission in a multi-branched network |
CH591190A5 (en) * | 1975-04-25 | 1977-09-15 | Hasler Ag | |
DE2538637C2 (en) * | 1975-08-30 | 1983-05-05 | Heinrich-Hertz-Institut für Nachrichtentechnik Berlin GmbH, 1000 Berlin | Digital time division multiplex messaging system |
DE2724431C2 (en) * | 1977-05-31 | 1986-06-19 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Telecommunication switching system with decentralized control and switching procedures for this |
DE2735634C2 (en) * | 1977-08-08 | 1986-09-18 | Rudolf Prof. Dr.-Ing. 3000 Hannover Nocker | Message system with multiple access and a tree ladder network |
DE2915488C2 (en) * | 1979-04-17 | 1982-05-19 | Nixdorf Computer Ag, 4790 Paderborn | Circuit arrangement for controlling the transmission of digital signals, in particular PCM signals, between connection points of a time division multiplex telecommunications network, in particular a PCM time division multiplex telecommunications network |
DE2917675A1 (en) * | 1979-04-27 | 1980-11-06 | Hertz Inst Heinrich | DIGITAL TIME MULTIPLEX MESSAGE SYSTEM |
FR2526250B1 (en) * | 1982-04-30 | 1988-05-13 | Labo Electronique Physique | METHOD FOR AUTOMATIC TIME SETTING OF STATIONS IN A MULTIPLEX TRANSMISSION AND DATA PROCESSING SYSTEM |
DE3687400T2 (en) * | 1985-11-04 | 1993-07-15 | Ibm | DIGITAL NEWS TRANSMISSION NETWORKS AND STRUCTURE OF TRANSMISSION WAYS IN THESE NETWORKS. |
DE4243441C1 (en) * | 1992-12-22 | 1994-04-14 | Ant Nachrichtentech | Time division multiplex data transmission system - has data streams for 2 or more partial networks combined with controlled delay providing time slot channel synchronisation. |
DE4243442C1 (en) * | 1992-12-22 | 1994-03-17 | Ant Nachrichtentech | Time multiplex transmission procedure - combining incoming data streams at each network node with time slot frame synchronisation maintained |
-
1972
- 1972-02-22 DE DE19722208159 patent/DE2208159B2/en active Granted
- 1972-02-23 DE DE19722208396 patent/DE2208396C3/en not_active Expired
-
1973
- 1973-02-12 IT IT2028173A patent/IT979021B/en active
- 1973-02-14 AT AT130673A patent/AT330851B/en not_active IP Right Cessation
- 1973-02-14 CH CH207973A patent/CH554114A/en not_active IP Right Cessation
- 1973-02-20 NL NL7302344A patent/NL7302344A/xx not_active Application Discontinuation
- 1973-02-21 SE SE7302434A patent/SE389590B/en unknown
- 1973-02-21 GB GB853573A patent/GB1411056A/en not_active Expired
- 1973-02-21 CA CA164,273A patent/CA1003134A/en not_active Expired
- 1973-02-21 CA CA164,272A patent/CA1019478A/en not_active Expired
- 1973-02-21 FR FR7306150A patent/FR2173134B1/fr not_active Expired
- 1973-02-22 JP JP2171973A patent/JPS4898711A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2130847A (en) * | 1982-09-22 | 1984-06-06 | Fujitsu Ltd | The timing of reception and transmission channels in communications systems |
US4562573A (en) * | 1982-09-22 | 1985-12-31 | Fujitsu Limited | Method and apparatus for adjusting channel insertion timing |
GB2149626A (en) * | 1983-10-27 | 1985-06-12 | Otis Elevator Co | Communications system |
Also Published As
Publication number | Publication date |
---|---|
FR2173134B1 (en) | 1979-08-03 |
IT979021B (en) | 1974-09-30 |
JPS4898711A (en) | 1973-12-14 |
CH554114A (en) | 1974-09-13 |
DE2208396C3 (en) | 1975-11-20 |
FR2173134A1 (en) | 1973-10-05 |
SE389590B (en) | 1976-11-08 |
CA1003134A (en) | 1977-01-04 |
DE2208396B2 (en) | 1975-03-13 |
AT330851B (en) | 1976-07-26 |
DE2208396A1 (en) | 1973-08-30 |
NL7302344A (en) | 1973-08-24 |
CA1019478A (en) | 1977-10-18 |
ATA130673A (en) | 1975-10-15 |
DE2208159A1 (en) | 1973-08-30 |
DE2208159B2 (en) | 1976-06-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |