GB2011748A - Standby amplifier arrangement for communication system - Google Patents
Standby amplifier arrangement for communication systemInfo
- Publication number
- GB2011748A GB2011748A GB7842554A GB7842554A GB2011748A GB 2011748 A GB2011748 A GB 2011748A GB 7842554 A GB7842554 A GB 7842554A GB 7842554 A GB7842554 A GB 7842554A GB 2011748 A GB2011748 A GB 2011748A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- standby
- communication system
- standby amplifier
- amplifier arrangement
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Amplifiers (AREA)
Abstract
An electrical transmission system suitable for an intercom or PA system and comprising a plurality of transmission paths each containing at least one amplifier 1, 11, has a facility for simultaneously removing an amplifier which has failed and substituting a standby amplifier 21. The change over is effected by switch-over devices 2, 3, 12, 13 associated with each of the amplifiers and an examining device 6, 16 associated with each of the amplifiers for determining the operability thereof. The examining device is connected with the switch-over devices for simultaneously controlling the switching out of the amplifier and the switching in of the standby amplifier. Interlock arrangements prevent an amplifier being switched on again after its replacement, and also prevent the standby amplifier being switched into a second path after it has already been coupled as a replacement into a first path. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2758776A DE2758776C2 (en) | 1977-12-29 | 1977-12-29 | Electrical transmission system, in particular exchange, counter or loudspeaker system |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2011748A true GB2011748A (en) | 1979-07-11 |
GB2011748B GB2011748B (en) | 1982-04-28 |
Family
ID=6027669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7842554A Expired GB2011748B (en) | 1977-12-29 | 1978-10-31 | Electrical communication systems |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT374064B (en) |
DE (1) | DE2758776C2 (en) |
GB (1) | GB2011748B (en) |
IT (1) | IT1107529B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3642378A1 (en) * | 1986-12-11 | 1988-06-30 | Siemens Ag | System for transmitting information with reserve switching devices |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2422806C3 (en) * | 1974-05-10 | 1985-08-29 | Neumann Elektronik GmbH, 4330 Mülheim | Device for the concentration of the line selection means in a key-operated intercom |
DE2605499A1 (en) * | 1976-02-12 | 1977-08-18 | Licentia Gmbh | Monitor for analogue amplifier - switches in reserve amplifier when main fails using electrooptical coupler and XOR gate |
-
1977
- 1977-12-29 DE DE2758776A patent/DE2758776C2/en not_active Expired
-
1978
- 1978-09-06 AT AT0643978A patent/AT374064B/en not_active IP Right Cessation
- 1978-10-31 GB GB7842554A patent/GB2011748B/en not_active Expired
- 1978-12-14 IT IT83641/78A patent/IT1107529B/en active
Also Published As
Publication number | Publication date |
---|---|
GB2011748B (en) | 1982-04-28 |
ATA643978A (en) | 1983-07-15 |
AT374064B (en) | 1984-03-12 |
DE2758776A1 (en) | 1979-08-16 |
IT7883641A0 (en) | 1978-12-14 |
IT1107529B (en) | 1985-11-25 |
DE2758776C2 (en) | 1987-11-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19941031 |