Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent
1996-09-19
1999-08-10
Bost, Dwayne D.
Telephonic communications
Supervisory or control line signaling
Using line or loop condition detection
379376, 379373, 379194, 379195, 379372, H04M 100
Patent
active
059370580
ABSTRACT:
When two or more telephone sets are in use on the same subscriber's loop, their activities may not be properly detected or monitored by the central office switch. The present invention provides a method of and an apparatus for coordinating activities so that call waiting caller ID or off-hook caller ID or other service features can work even if there are off-hook extensions on the same loop. The invention ensures that only one set among a plurality of off-hook sets responds to the switch.
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"The Analog Display Services Interface", B.K. Schwartz, IEEE Communications Magazine, vol. 31, No. 4, Apr. 1993, pp. 70-75.
Becker Christopher Henry
Bleile Leonard George
Kos Steven
Bost Dwayne D.
Ferguson Keith
Northern Telecom Limited
Toyooka Yoshiharu
LandOfFree
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