Voice alarm signalling system
US4347607A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1980 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | May 9, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/071
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Voice and alarm signalling capability between supervisory personnel at monitor and control sites located at separated transceiver facilities of a (repeatered) multichannel communication network is provided by a multichannel multiplexed encode/decode scheme in which voice and/or alarm signals generated at one station are digitally encoded and formatted so as to be inserted into the data stream of the normally conveyed data traffic over the active channels of the network. At the receiving terminal site, these inserted signals are removed from the high data rate digital data stream and delivered to decoding equipment which reconstructs the original voice and/or alarm signals for delivery to the audio equipment of station operation personnel. The encoded signals are inserted as overhead bits for each active channel, so that a fault on one channel will not prevent the completion of trasmission of the intended communication between terminal site personnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.