GB1341487A - Telecommunications exchange systems - Google Patents
Telecommunications exchange systemsInfo
- Publication number
- GB1341487A GB1341487A GB4000571A GB4000571A GB1341487A GB 1341487 A GB1341487 A GB 1341487A GB 4000571 A GB4000571 A GB 4000571A GB 4000571 A GB4000571 A GB 4000571A GB 1341487 A GB1341487 A GB 1341487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- contact
- winding
- free
- busy
- 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)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
1341487 Automatic exchange equipment SIEMENS AG 26 Aug 1971 [3 Sept 1970] 40005/71 Heading H4K A path selection network for a switching network having co-ordinate switches which do not require a holding current to maintain them in an operated state has free/busy relays with two windings and changeover contacts where one winding is an operating winding and the second winding, connected in series with the normally open contact, is connected via two similarly poled decoupling rectifiers to special row and column lines in accordance with the spatial position of the contacts. In the arrangement shown wires between adjacent cross-point switches are represented as the rows and columns respectively of the matrix shown and marking occurs from both ends by contacts ek1, mk1. If row contact ek1 and marker contact Zk1 are operated together the crosspoint relay EKV1 (Fig. 1, not shown) will operate together with free/busy relay Be1Z1 and contact belzl (Fig. 8) will changeover and energize holding winding II through diodes 6 and normally closed contacts el, z1 from low voltage V (There being no hold on current circuit through the cross-point switches). Release of the free/busy relay is obtained by opening the respective contact Z 1 or alternatively to ensure that all contacts representing these connections are restored to their rest position hown, the contact Z may be opened when there is no traffic on the connections. In the case where latching free/busy relays are used, the additional winding II is pulsed to effect release. In this embodiment contacts e 1 , e 10 will be normally open and are momentarily closed to effect release.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702043767 DE2043767C (en) | 1970-09-03 | Circuit arrangement for searching for and selecting free connection paths in a switching network containing several switching stages for telecommunications, in particular for telephone systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1341487A true GB1341487A (en) | 1973-12-19 |
Family
ID=5781516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4000571A Expired GB1341487A (en) | 1970-09-03 | 1971-08-26 | Telecommunications exchange systems |
Country Status (8)
Country | Link |
---|---|
AT (1) | AT317306B (en) |
BE (1) | BE772174A (en) |
CH (1) | CH537135A (en) |
FR (1) | FR2102045A5 (en) |
GB (1) | GB1341487A (en) |
LU (1) | LU63817A1 (en) |
NL (1) | NL7112084A (en) |
SE (1) | SE376353B (en) |
-
1971
- 1971-08-12 AT AT705871A patent/AT317306B/en not_active IP Right Cessation
- 1971-08-17 CH CH1207071A patent/CH537135A/en not_active IP Right Cessation
- 1971-08-26 GB GB4000571A patent/GB1341487A/en not_active Expired
- 1971-08-31 FR FR7131429A patent/FR2102045A5/fr not_active Expired
- 1971-09-01 LU LU63817D patent/LU63817A1/xx unknown
- 1971-09-02 NL NL7112084A patent/NL7112084A/xx unknown
- 1971-09-03 SE SE1123471A patent/SE376353B/xx unknown
- 1971-09-03 BE BE772174A patent/BE772174A/en unknown
Also Published As
Publication number | Publication date |
---|---|
SE376353B (en) | 1975-05-12 |
CH537135A (en) | 1973-05-15 |
DE2043767A1 (en) | 1972-03-16 |
BE772174A (en) | 1972-03-03 |
NL7112084A (en) | 1972-03-07 |
LU63817A1 (en) | 1972-01-11 |
AT317306B (en) | 1974-08-26 |
DE2043767B2 (en) | 1972-03-16 |
FR2102045A5 (en) | 1972-03-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |