Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Monitoring
Patent
1998-06-25
2000-07-04
Loomis, Paul
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Monitoring
379189, 379196, 379377, H04M 124, H04M 300
Patent
active
060849487
ABSTRACT:
The present invention provides a voice monitoring system for remote subscribers, which enables voice monitoring for even those calls which are set in speech mode after connected by drop-back in remote local equipment without the intervention of a time division switch in a telephone network. The voice monitoring system for remote subscribers offered by this invention is intended for voice monitoring for subscribers accommodated by remote local equipment connected to a time division switch in a telephone network. Primarily, this system comprises connection means for providing monitoring paths in the concentrator in the remote local equipment and connecting speech paths for subscribers in speech mode to these monitoring paths, supervision means for supervising the call statuses of subscribers accommodated by the remote local equipment connected to a time division switch of telephone network, a trunk for three party speech handled by the time division switch of telephone network, and a voice monitoring telephone connected to one circuit of the trunk for three party speech, and connects the monitoring paths provided in the remote local equipment to two circuits of the trunk for three party speech, according to the call statuses of subscribers.
REFERENCES:
patent: 5471519 (1995-11-01), Howe et al.
patent: 5745558 (1998-04-01), Richardson, Jr. et al.
patent: 5796811 (1998-08-01), McFarlen
Loomis Paul
NEC Corporation
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