GB1489741A - Telecommunication system networks - Google Patents
Telecommunication system networksInfo
- Publication number
- GB1489741A GB1489741A GB3394173A GB3394173A GB1489741A GB 1489741 A GB1489741 A GB 1489741A GB 3394173 A GB3394173 A GB 3394173A GB 3394173 A GB3394173 A GB 3394173A GB 1489741 A GB1489741 A GB 1489741A
- Authority
- GB
- United Kingdom
- Prior art keywords
- digital
- check
- receiving station
- test
- path
- 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
- 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)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
1489741 Testing telecommunication systems POST OFFICE 17 Oct 1974 [17 July 1973] 33941/73 Heading H4K To test the continuity of a two-way transmission link between an originating station and a receiving station, communication in each direction being along a respective two-wire path, the paths are intercoupled at the originating station to form a looped transmission link and, before intelligence is exchanged, a test signal is transmitted from the receiving station and its return over the loop is monitored at the receiving station. Typically, a check is made of a path set up between a calling subscriber connected to a concentrator/muliplexer 40/41 and a called subscriber on concentrator/multiplexer 45/46, the path being via a p.c.m. link 42, a digital switching subsystem (DSS) 44 with its associated group control (GC) 43, a trunk circuit 50 and similar integers 49, 48, 47. The check is made in three parts, as shown. To carry out the check, each GC includes a digital test tone sender (52) two digital receivers (53, 54) and associated switches, Fig. 11 (not shown). Preferably the test signal is in digital form and represents a tone in the speech frequency band.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3394173A GB1489741A (en) | 1974-10-17 | 1974-10-17 | Telecommunication system networks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3394173A GB1489741A (en) | 1974-10-17 | 1974-10-17 | Telecommunication system networks |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1489741A true GB1489741A (en) | 1977-10-26 |
Family
ID=10359362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3394173A Expired GB1489741A (en) | 1974-10-17 | 1974-10-17 | Telecommunication system networks |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1489741A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2399775A1 (en) * | 1977-08-05 | 1979-03-02 | Int Standard Electric Corp | CONTINUITY TEST DEVICE FOR TELECOMMUNICATIONS SYSTEM |
FR2503511A1 (en) * | 1981-04-03 | 1982-10-08 | Cit Alcatel | Digital switching system for telephonic auto-commutator - utilises microprocessor in marker unit to drive memory controller for buffer memories in switching network |
GB2158326A (en) * | 1984-04-26 | 1985-11-06 | Standard Telephones Cables Ltd | Testing arrangements of a digital switching systems |
-
1974
- 1974-10-17 GB GB3394173A patent/GB1489741A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2399775A1 (en) * | 1977-08-05 | 1979-03-02 | Int Standard Electric Corp | CONTINUITY TEST DEVICE FOR TELECOMMUNICATIONS SYSTEM |
FR2503511A1 (en) * | 1981-04-03 | 1982-10-08 | Cit Alcatel | Digital switching system for telephonic auto-commutator - utilises microprocessor in marker unit to drive memory controller for buffer memories in switching network |
GB2158326A (en) * | 1984-04-26 | 1985-11-06 | Standard Telephones Cables Ltd | Testing arrangements of a digital switching systems |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |