Individual subchannel loopback in the PCM interfaces of a digital telephone exchange with control of the outbound path
US4860281A · kind A · utility
30Cited by
13References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 29, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Feb 29, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13292
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital radiotelephone exchange having self diagnostic individual subchannel loopback is disclosed. An individual subchannel of an outbound PCM data stream is substituted for an individual subchannel of an inbound PCM data stream. The removed individual subchannel of the inbound PCM data stream is either substituted in the outbound PCM data stream or discarded. Line signal bits may be generated and substituted for the line signal bits of the individual subchannel in the outbound PCM data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.