GB1466433A - Data insertion device - Google Patents
Data insertion deviceInfo
- Publication number
- GB1466433A GB1466433A GB3979074A GB3979074A GB1466433A GB 1466433 A GB1466433 A GB 1466433A GB 3979074 A GB3979074 A GB 3979074A GB 3979074 A GB3979074 A GB 3979074A GB 1466433 A GB1466433 A GB 1466433A
- Authority
- GB
- United Kingdom
- Prior art keywords
- store
- speech
- register
- information
- control
- 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)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
1466433 Automatic exchange systems INTERNATIONAL STANDARD ELECTRIC CORP 12 Sept 1974 [18 Sept 1973] 39790/74 Heading H4K Signalling or control information can be switched through a speech store of a TDM exchange either by using storage locations associated with free speech channels or, if all speech channels are in use, by utilizing the storage location of a busy speech channel. In the latter case the speech information which would have been switched is cancelled, the arrangement being subject to the constraint that only a predetermined amount of speech information associated with a particular channel may be cancelled. In normal operation speech samples are fed from a register 24 into locations of speech store 1 under the control of addresses which respectively appear in register 22 half a time slot earlier, and a connection store 2 controls the read out for the speech store locations. During the half time slots during which samples are being read into store 1, a central control can insert a binary 1 into any storage position of a further store 16 to indicate that it wishes to utilize the corresponding location of store 1 for transferring signalling or control data. When the particular storage location is due to be written into as indicated by the appearance of the location address in register 22, the binary 1 signal in store 16 is fed to register 19 to prevent any speech information in register 24 from being written into store 1 during the following half time slot. As a result the data from central control 11 is written into the store 1 for subsequent read out as determined by information fed into connection store 2 by the central control. The central data may relate to maintenance messages for testing the speech network, a message inserted into the speech store 1 being compared with the original message after it has been switched through the network.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7333395A FR2248758A5 (en) | 1973-09-18 | 1973-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1466433A true GB1466433A (en) | 1977-03-09 |
Family
ID=9125179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3979074A Expired GB1466433A (en) | 1973-09-18 | 1974-09-12 | Data insertion device |
Country Status (6)
Country | Link |
---|---|
US (1) | US3920920A (en) |
BE (1) | BE820037A (en) |
CH (1) | CH589398A5 (en) |
DE (1) | DE2442673C2 (en) |
FR (1) | FR2248758A5 (en) |
GB (1) | GB1466433A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0025225A1 (en) * | 1979-09-10 | 1981-03-18 | Western Electric Company, Incorporated | Broadcast and alternate message time slot interchanger |
EP0042666A1 (en) * | 1980-06-25 | 1981-12-30 | THE PLESSEY COMPANY plc | Time division multiplex telecommunication digital switching module |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4059729A (en) * | 1976-06-09 | 1977-11-22 | Martin Marietta Aerospace | Method and system for selectively accessing multiplexed data transmission network for monitoring and testing of the network |
US4296492A (en) * | 1979-12-26 | 1981-10-20 | Bell Telephone Laboratories, Incorporated | Continuity verification arrangement |
US4493073A (en) * | 1982-08-30 | 1985-01-08 | At&T Bell Laboratories | Maintenance of stored program controlled switching systems |
US4698802A (en) * | 1986-03-07 | 1987-10-06 | American Telephone And Telegraph Company And At&T Information Systems Inc. | Combined circuit and packet switching system |
US5347566A (en) * | 1991-10-23 | 1994-09-13 | Digital Transmission Systems, Inc. | Retrofit subscriber loop carrier system with improved performance monitoring and remote provisioning |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1252555A (en) * | 1970-02-17 | 1971-11-10 | ||
FR2142317A5 (en) * | 1971-06-18 | 1973-01-26 | Sits Soc It Telecom Siemens | |
US3860761A (en) * | 1973-06-14 | 1975-01-14 | Bell Telephone Labor Inc | Digital progressively controlled switching system |
-
1973
- 1973-09-18 FR FR7333395A patent/FR2248758A5/fr not_active Expired
-
1974
- 1974-09-06 DE DE2442673A patent/DE2442673C2/en not_active Expired
- 1974-09-12 GB GB3979074A patent/GB1466433A/en not_active Expired
- 1974-09-16 US US506420A patent/US3920920A/en not_active Expired - Lifetime
- 1974-09-17 CH CH1263174A patent/CH589398A5/xx not_active IP Right Cessation
- 1974-09-18 BE BE2053867A patent/BE820037A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0025225A1 (en) * | 1979-09-10 | 1981-03-18 | Western Electric Company, Incorporated | Broadcast and alternate message time slot interchanger |
EP0042666A1 (en) * | 1980-06-25 | 1981-12-30 | THE PLESSEY COMPANY plc | Time division multiplex telecommunication digital switching module |
Also Published As
Publication number | Publication date |
---|---|
US3920920A (en) | 1975-11-18 |
FR2248758A5 (en) | 1975-05-16 |
BE820037A (en) | 1975-03-18 |
DE2442673C2 (en) | 1984-03-29 |
AU7323574A (en) | 1976-03-18 |
CH589398A5 (en) | 1977-06-30 |
DE2442673A1 (en) | 1975-03-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |