Telephone exchange including service feature apparatus

Details Telephone exchange including service feature apparatus Telephone exchange including service feature apparatus

1989-03-30

1990-10-30

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701101, H04Q 1104

Patent

active

049674080

ABSTRACT:
A feature apparatus is arranged to share exclusive access, to a time division multiplex switching network, with another element of a telephone switching facility (PBX). The other element may be a line appearance group, or a service circuit. The feature apparatus is arranged within an equipment enclosure common to the switching facility, along with a power supply for supplying energizing current for operation of the switching facility and the feature apparatus so that the PBX may support a voice message feature for example, usually without an additional floor space requirement typical of other systems arrangements.

REFERENCES:
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patent: 3867582 (1975-02-01), Weed et al.
patent: 4069399 (1978-01-01), Barrett et al.
patent: 4371752 (1983-02-01), Mathews et al.
patent: 4612634 (1986-09-01), Bellamy
patent: 4696028 (1987-09-01), Morganstein et al.
patent: 4787081 (1988-11-01), Waters et al.
patent: 4788682 (1988-11-01), Vij et al.
patent: 4789981 (1988-12-01), Yanosy, Jr. et al.

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