Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent
1997-01-21
1999-11-02
Isen, Forester W.
Telephonic communications
Supervisory or control line signaling
Using line or loop condition detection
379156, 379161, 379373, H04M 300
Patent
active
059784695
ABSTRACT:
The present invention is directed to a control system which interfaces a plurality of telephones, referred to as extensions, to a central office telephone line. The control system includes a ring detector, a ring generator, a controller and a telephone extension bus. In accordance with one embodiment of the present invention, the control system is programmable to: (i) control the ringing function of a plurality of extensions when an incoming call is received; (ii) control the staging of the ringing function of a plurality of extensions when an incoming call is received; (iii) control the use of one or more of a plurality of extensions to initiate an outgoing call; (iv) control the use of one or more of a plurality of extensions when another extension is in-use, i.e. presently being used to engage in an ongoing telephone call; (v) control the use of one or more of a plurality of extensions when another extension is being used for a data call, i.e., a data transmission or communication between machines including, for example, facsimile machines and computers; and (vi) control access to a central office telephone line by one or more extensions when another extension is in-use.
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Isen Forester W.
MediaOne Group Inc.
Saint-Surin Jacques M.
U S West, Inc.
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