EP 0870389 A1 19981014 - SIMULATING CHANGES IN TELEPHONE SUBSCRIBER LINE
Title (en)
SIMULATING CHANGES IN TELEPHONE SUBSCRIBER LINE
Title (de)
VERÄNDERUNGSIMULIERUNG IN TELEFONTEILNEHMERLEITUNG
Title (fr)
SIMULATION DE VARIATIONS DANS UNE LIGNE TELEPHONIQUE D'ABONNE
Publication
Application
Priority
- CA 9700802 W 19971024
- CA 2188844 A 19961025
- US 77267396 A 19961220
Abstract (en)
[origin: WO9819436A1] A fixed wireless access subscriber unit containing a wireless transceiver and a telephone subscriber line interface circuit which supports privacy and remote release of hold between the subscriber unit and extension telephones are disclosed. The subscriber unit detects when the primary handset, or an extension telephone set goes off-hook. In response the subscriber unit modifies the voltage and/or current characteristics on the telephone subscriber line which connects the extension sets to the subscriber unit in such a manner that extension sets connected to the telephone subscriber line will sense when the primary handset goes off-hook.
IPC 1-7
IPC 8 full level
H04M 1/715 (2021.01); H04M 1/723 (2006.01); H04M 1/725 (2021.01); H04M 3/00 (2006.01); H04M 9/02 (2006.01); H04Q 7/20 (2006.01); H04W 84/14 (2009.01); H04Q 7/32 (2006.01)
CPC (source: EP)
H04M 1/715 (2021.01); H04M 1/725 (2013.01); H04M 3/005 (2013.01); H04M 9/02 (2013.01); H04W 84/14 (2013.01)
Citation (search report)
See references of WO 9819436A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9819436 A1 19980507; CN 1211370 A 19990317; EP 0870389 A1 19981014; MX 9805137 A 19981031
DOCDB simple family (application)
CA 9700802 W 19971024; CN 97192311 A 19971024; EP 97910183 A 19971024; MX 9805137 A 19980624