Digital communication apparatus and method
US4980887A · kind A · utility
36Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A T1 digital carrier system having a transmitter, receiver and a plurality of intermediate repeater stages. Each remote repeater has a select switch for automatically selecting that the remote repeater be placed in loop-back mode should a combination of framing bits occur in the serial bit stream that matches that said remote repeaters address therein, thereby allowing remote testing of the communications link and repeaters. In addition, no additional test lines are required to verify a T1 communications link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.