System for party line suppressed ringing access of subscriber li

Details System for party line suppressed ringing access of subscriber li System for party line suppressed ringing access of subscriber li

1998-06-05

2000-03-14

Loomis, Paul

Telephonic communications

Telephone line or system combined with diverse electrical...

Remote indication over telephone line

37910603, 379177, H04M 1100

Patent

active

06038297&

ABSTRACT:
The system for party line suppressed ringing access enables a service provider to access both a subscriber line and the equipment that is connected to this subscriber line. The present system makes use of the availability of party line communication apparatus, in the form of a subscriber line network interface that is equipped to interface to two lines: the subscriber line, and a telemetry party line. When an incoming call is identified as a suppressed ringing telemetry access call, the serving central office accesses the subscriber line via a suppressed ringing connection on the telemetry party line. The service provider can poll a plurality of the subscribers that are connected to the telemetry party line by means of distinctive signaling to poll each subscriber network interface seriatim. Once the subscriber network interface recognizes a poll received on the telemetry party line, it interconnects the telemetry equipment to the telemetry party line and the telemetry access operation proceeds in well known fashion to retrieve collected telemetry data from telemetry equipment connected to the subscriber line or perform tests on the subscriber line or equipment connected thereto, or perform any other data collection function on the selected subscriber line.

REFERENCES:
patent: 3922492 (1975-11-01), Lumsden

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