EP 0997025 A1 20000503 - DETECTION OF HANDSET STATE
Title (en)
DETECTION OF HANDSET STATE
Title (de)
HANDAPPARATURZUSTANDSDETEKTION
Title (fr)
DETECTION DE L'ETAT D'UN COMBINE
Publication
Application
Priority
- FI 9800563 W 19980626
- FI 972801 A 19970627
Abstract (en)
[origin: WO9900963A1] In voice communications taking place by way of a computer, it is a problem how to supply information on the activity state of a separate telephone handset to the computer attending to call management. In this invention, the handset state is found out by causing on the computer audio card's microphone line an echo of the signal sent to the audio card's loudspeaker line when the handset is in the first state (off-hook or on-hook). When the handset is in the second state (on-hook or off-hook), the echo connection is broken off. The handset state can hereby be deduced by measuring the characteristics of the echo perceived on the microphone line.
IPC 1-7
IPC 8 full level
H04M 1/60 (2006.01); H04M 1/82 (2006.01); H04M 3/22 (2006.01); H04M 3/42 (2006.01)
CPC (source: EP)
H04M 1/6033 (2013.01); H04M 1/82 (2013.01); H04M 3/2272 (2013.01); H04M 3/42323 (2013.01)
Citation (search report)
See references of WO 9900963A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9900963 A1 19990107; AU 7922098 A 19990119; EP 0997025 A1 20000503; FI 103623 B1 19990730; FI 103623 B 19990730; FI 972801 A0 19970627; FI 972801 A 19981228
DOCDB simple family (application)
FI 9800563 W 19980626; AU 7922098 A 19980626; EP 98929470 A 19980626; FI 972801 A 19970627