Circuit arrangement for centrally controlled time division multiplex telecommunication exchange facilities
US4763316A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Feb 19, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/0407
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit for a centrally controlled time division multiplex telecommunication exchange having PCM line/trunk groups connected to a switching network wherein each line/trunk group comprises a plurality of line units to connect one time division multiplex interexchange trunk each and is connected to a switching network over a time division multiplex line. Two line/trunk groups are assigned to each other in pairs. The connection devices which are assigned to one and to the other of two line/trunk groups and which in normal operation are connected with the time division multiplex switching device of each of their own line/trunk group can be changed over during emergency operation of one of the two line/trunk groups to the time division multiplex switching device of the other line/trunk group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.