Apparatus for communication between a telephone exchange and con

Details Apparatus for communication between a telephone exchange and con Apparatus for communication between a telephone exchange and con

1997-01-08

1999-11-30

Weaver, Scott

Telephonic communications

Centralized switching system

Switching controlled in response to called station...

379399, 370431, H04M 900

Patent

active

059956160

ABSTRACT:
In the connection of a number of telephone sets to a private branch exchange, control information is communicated between the telephone sets and the exchange set in such a way that a bidirected conversion unit is required. In order to provide a high degree of service at a reasonable cost the telephone sets are collected in groups which share a generally smaller number of conversion units. By way of suitable control devices and switch units in the forwarding of control information, a suitable non-occupied conversion unit can be selected.

REFERENCES:
patent: 4325147 (1982-04-01), Rothlauf
patent: 4455646 (1984-06-01), Bloodworth
patent: 4627047 (1986-12-01), Pitroda et al.
patent: 4771418 (1988-09-01), Narasinmhan et al.
patent: 4984266 (1991-01-01), Smith
patent: 5222130 (1993-06-01), Pflueger et al.
patent: 5283827 (1994-02-01), Conforti et al.
patent: 5323460 (1994-06-01), Warner et al.

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