Call initiation delay arrangement for digital data switching system
US3959599A · kind A · utility
5Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1975 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Mar 14, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/525
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital data switching system is designed for rapid calling of data machines by subscriber polling equipment. In the event, however, that calls cannot be completed due, for example, to busy conditions of called machines or to failure of machines to answer the calls, the polling equipment is precluded from rapidly initiating new calls that overload the common control equipment. A timing circuit delays the initiation of new calls by blocking requests for the services of the common control equipment if completion of the previous call is unsuccessful and the common control equipment is continuously active.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.