IT1137932B - Arbitration controller for telephone exchange - Google Patents
Arbitration controller for telephone exchangeInfo
- Publication number
- IT1137932B IT1137932B IT22560/81A IT2256081A IT1137932B IT 1137932 B IT1137932 B IT 1137932B IT 22560/81 A IT22560/81 A IT 22560/81A IT 2256081 A IT2256081 A IT 2256081A IT 1137932 B IT1137932 B IT 1137932B
- Authority
- IT
- Italy
- Prior art keywords
- circuits
- arbitration
- access
- initialisation
- signal
- Prior art date
Links
Landscapes
- Exchange Systems With Centralized Control (AREA)
Abstract
The appts. is used in a telephone switching system where a number of microprocessors require access to a common resource. An arbitrating system resolves the conflicting requests where this access is requested simultaneously. The arbitration controller comprises a number of circuits which are connected by data busses to the common resource. Initialisation units are connected to the arbitration circuits and groups of arbitration circuits are interconnected by data busses to form looped systems. The looped systems propagate data in synchronism with signals from the initialisation circuits. The arbitration circuits of each group operate simultaneously when a demand signal is issued. These transmit a signal to the active CPU which issues a selection signal to operate the switching circuits to give access to the chosen microprocessor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/163,046 US4374414A (en) | 1980-06-26 | 1980-06-26 | Arbitration controller providing for access of a common resource by a duplex plurality of central processing units |
US06/163,045 US4374413A (en) | 1980-06-26 | 1980-06-26 | Arbitration controller providing for access of a common resource by a plurality of central processing units |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8122560A0 IT8122560A0 (en) | 1981-06-25 |
IT1137932B true IT1137932B (en) | 1986-09-10 |
Family
ID=26859294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT22560/81A IT1137932B (en) | 1980-06-26 | 1981-06-25 | Arbitration controller for telephone exchange |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1137932B (en) |
-
1981
- 1981-06-25 IT IT22560/81A patent/IT1137932B/en active
Also Published As
Publication number | Publication date |
---|---|
IT8122560A0 (en) | 1981-06-25 |
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