Call queue release control circuit
US3975597A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1974 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Nov 25, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A call queue release control circuit for automatic toll switchboards is disclosed. The call queue release control circuit is supervised by a plurality of multi-position switches that are set in accordance with decisions made at a chief operator position as to the number of different types of calls to be released in an allocation chain. Individual numbers of calls to be released are loaded through guarded inputs into separate presettable counter circuits associated with the type of call to be released. A sequencing circuit addresses the plurality of counter circuits in succession to form the allocation chain. As a particular counter circuit is addressed, the sequencing circuit provides an enabling signal to a call queue control circuit for releasing the type of call associated therewith and receives from the call queue control circuit a confirmation signal for every call released. The confirmation signal is used to clock the counter circuit until an indication that the number of calls preset therein has been released. Upon an indication of a final count being reached the sequencing circuit steps to the next counter circuit in the allocation chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.