EP 1400098 A2 20040324 - METHODS AND APPARATUS FOR SIMULTANEOUSLY COMMUNICATING VOICE AND DATA IN AN ANALOG CORDLESS TELEPHONE SYSTEM
Title (en)
METHODS AND APPARATUS FOR SIMULTANEOUSLY COMMUNICATING VOICE AND DATA IN AN ANALOG CORDLESS TELEPHONE SYSTEM
Title (de)
VERFAHREN UND VORRICHTUNGEN ZUM GLEICHZEITIGEN ÜBERMITTELN VON SPRACHE UND DATEN IN EINEM ANALOGEN SCHNURLOSEN FERNSPRECHSYSTEM
Title (fr)
PROCEDES ET DISPOSITIF DE TRANSMISSION SIMULTANEE VOIX ET DONNEES DANS UN SYSTEME TELEPHONIQUE ANALOGIQUE SANS CORDON
Publication
Application
Priority
- US 0145498 W 20011115
- US 24894000 P 20001116
- US 95588201 A 20010919
Abstract (en)
[origin: WO0241617A2] A method of simultaneously communicating voice and data on the same channel in an analog cordless telephone system involves generating an analog signal from an audible voice signal during a cordless telephone call; generating a frequency shift keying (FSK) signal from digital data having a nominal frequency of about 20 KHz; summing the analog signal and the FSK signal to produce a composite analog and digital signal; modulating a radio frequency (RF) carrier with the composite analog and digital signal to produce a modulated RF carrier; and transmitting the modulated RF carrier. On the receiving end, the method involves receiving hte modulated RF carrier during the call; demodulating the modulated RF carrier to reproduce the composite analog and digital signal; bandpass filtering the composite analog and digital signal to separate the analog signal and the FSK signal from one another; reproducing the audible voice signal from the analog signal; and detecting the digital data from the FSK signal and processing the digital data for display and control.
IPC 1-7
IPC 8 full level
H04L 27/10 (2006.01); H04L 27/34 (2006.01); H04M 1/00 (2006.01); H04M 1/725 (2006.01); H04M 1/72502 (2021.01); H04M 11/06 (2006.01); H04M 1/57 (2006.01)
CPC (source: EP KR)
H04B 7/26 (2013.01 - KR); H04L 27/3483 (2013.01 - EP); H04M 1/72502 (2013.01 - EP); H04M 11/06 (2013.01 - EP); H04M 1/57 (2013.01 - EP)
Citation (search report)
See references of WO 0241617A2
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0241617 A2 20020523; WO 0241617 A3 20040108; AU 2582502 A 20020527; CA 2428926 A1 20020523; CN 1539235 A 20041020; EP 1400098 A2 20040324; JP 2004527141 A 20040902; KR 20030070031 A 20030827; MX PA03004265 A 20041203
DOCDB simple family (application)
US 0145498 W 20011115; AU 2582502 A 20011115; CA 2428926 A 20011115; CN 01821967 A 20011115; EP 01995310 A 20011115; JP 2002543215 A 20011115; KR 20037006606 A 20030515; MX PA03004265 A 20011115