GB1453518A - Centrally controlled telecommunications exchange systems - Google Patents
Centrally controlled telecommunications exchange systemsInfo
- Publication number
- GB1453518A GB1453518A GB345574A GB345574A GB1453518A GB 1453518 A GB1453518 A GB 1453518A GB 345574 A GB345574 A GB 345574A GB 345574 A GB345574 A GB 345574A GB 1453518 A GB1453518 A GB 1453518A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exchange
- section
- free
- scanner
- junctors
- 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
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
- H04Q3/0012—Selecting arrangements using relay selectors in the switching stages in which the relays are arranged in a matrix configuration
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Exchange Systems With Centralized Control (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
1453518 Automatic exchange systems SIEMENS AG 25 Jan 1974 [30 Jan 1973] 03455/74 Heading H4K In a centrally controlled exchange a scanner, which is used for scanning all the circuits of an exchange which have a network appearance, is additionally used at the end of each exchange operating cycle to determine whether any of a particular group of exchange circuits is idle. The exchange is a PBX of the folded network type in which the exchange circuits such as subscriber line circuits T1, T2, local junctors HV, main exchange junctors (AV) and registers WS are connected to one side of the network. All such circuits are scanned/identified by use of a single scanner S which operates in four distinct modes to identify the number of the multiple switch input (section S1) the number of the multiple switch (section S2), the switching group (section S3) and the switching network section (section S4). The additional use of the scanner is to determine periodically whether there are any free local or main exchange junctors in the exchange and to cause lights to be lit at an operator's position which each indicate that at least one of a respective type of junctor is available. To this end at the end of every other exchange operating cycle the programmed controlled processor P causes all free local junctors to emit a request signal to the scanner which is enacted to use its "network section" searching section S4 to determine whether any section has a free local junctor, the presence of a free junctor in any section causing a lamp to be lit at the operator's position. At the end of each following exchange cycle a similar process is carried out to determine if any free main exchange junctors are available. The Specification also describes the general scanner operation for establishing a connection between a calling subscriber circuit T1 and a free register WS such that the shortest path can be used in the switching network. To this end once a calling subscriber circuit T1 has been identified the scanner first looks for a free register connected to the same switch as the caller and only proceeds to a group search, a section search and finally an all register search if no free register is found at a lower level.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732304415 DE2304415C3 (en) | 1973-01-30 | 1973-01-30 | Circuit arrangement for centrally controlled telecommunications switching systems with viewfinders |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1453518A true GB1453518A (en) | 1976-10-27 |
Family
ID=5870337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB345574A Expired GB1453518A (en) | 1973-01-30 | 1974-01-25 | Centrally controlled telecommunications exchange systems |
Country Status (11)
Country | Link |
---|---|
AT (1) | AT330248B (en) |
BE (1) | BE810376A (en) |
CH (1) | CH567852A5 (en) |
DE (1) | DE2304415C3 (en) |
DK (1) | DK140450C (en) |
FR (1) | FR2215770B1 (en) |
GB (1) | GB1453518A (en) |
IT (1) | IT1007089B (en) |
LU (1) | LU69246A1 (en) |
NL (1) | NL167829C (en) |
SE (1) | SE398951B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0398543A1 (en) * | 1989-05-08 | 1990-11-22 | AT&T Corp. | Concurrent multi-stage network control method |
-
1973
- 1973-01-30 DE DE19732304415 patent/DE2304415C3/en not_active Expired
- 1973-12-14 AT AT1051473A patent/AT330248B/en not_active IP Right Cessation
-
1974
- 1974-01-09 CH CH22974A patent/CH567852A5/xx not_active IP Right Cessation
- 1974-01-25 GB GB345574A patent/GB1453518A/en not_active Expired
- 1974-01-25 IT IT1980774A patent/IT1007089B/en active
- 1974-01-25 FR FR7402532A patent/FR2215770B1/fr not_active Expired
- 1974-01-28 NL NL7401132A patent/NL167829C/en not_active IP Right Cessation
- 1974-01-28 LU LU69246D patent/LU69246A1/xx unknown
- 1974-01-29 DK DK46574A patent/DK140450C/en not_active IP Right Cessation
- 1974-01-30 SE SE7401217A patent/SE398951B/en unknown
- 1974-01-30 BE BE140356A patent/BE810376A/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0398543A1 (en) * | 1989-05-08 | 1990-11-22 | AT&T Corp. | Concurrent multi-stage network control method |
Also Published As
Publication number | Publication date |
---|---|
DK140450C (en) | 1980-02-04 |
DK140450B (en) | 1979-08-27 |
AT330248B (en) | 1976-06-25 |
FR2215770B1 (en) | 1981-04-30 |
FR2215770A1 (en) | 1974-08-23 |
ATA1051473A (en) | 1975-09-15 |
IT1007089B (en) | 1976-10-30 |
DE2304415B2 (en) | 1977-08-04 |
DE2304415C3 (en) | 1978-04-06 |
CH567852A5 (en) | 1975-10-15 |
NL7401132A (en) | 1974-08-01 |
LU69246A1 (en) | 1974-04-10 |
NL167829B (en) | 1981-08-17 |
SE398951B (en) | 1978-01-23 |
BE810376A (en) | 1974-07-30 |
NL167829C (en) | 1982-01-18 |
DE2304415A1 (en) | 1974-08-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |