Time division exchange for carrying out a loop-back test
US4688208A · kind A · utility
13Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1985 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Aug 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13292
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A time division exchange interchanges predetermined time slots of a time division multiplexed signal and returns it to a network during a loop-back test. A buffer memory in a time division multiplexed trunk is used to interchange the predetermined time slots. Alternatively, the buffer memory is provided in a return loop for use during the loop-back test. Therefore, it can be determined that the received signal is sent from another exchange and the loop-back test can be performed using ordinary exchanging processing procedures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.