Communications: electrical – Continuously variable indicating – With meter reading
Patent
1982-07-01
1985-02-12
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
370 85, H04Q 900, H04J 316
Patent
active
044994613
ABSTRACT:
A circuit arrangement for centrally-controlled telecommunication exchange systems, particularly for time-division multiplex telephone exchange systems, with information exchange between sub-central devices, is characterized by the provision of an input/output processor device, in addition to the central control unit, which comprises an input memory portion and an output memory portion. The input memory portion is divided into sub-memories which receive information intended for a line trunk group and to be processed by the central control unit, while the output memory portion is divided into sub-memories which are assigned to respective buffers for information transfer between the sub-central devices, by-passing the central control unit. For the purpose of information transmission from one line trunk group to another, an auxiliary criterion is added to the information to be transmitted in addition to the address of the destination line trunk group, the auxiliary criterion causing the input/output processor device to write the information directly into the output sub-memory of that sub-central device which serves the destination line trunk group.
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Asmussen et al., "EWSD Digital Switching System", Telcom Report, Special Issue, vol. 4, 1981.
Siemens Aktiengesellschaft
Yusko Donald J.
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