Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1993-11-12
1995-12-05
Chan, Wing F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379 98, H04M 1100
Patent
active
054736757
ABSTRACT:
A modem, capable of simultaneously coupling voice and data signals, connects local digital terminal equipment (DTE) and a local telephone to a communications link. To prevent the local DTE from responding to a communications containing only voice signals, the local DTE is notified of an incoming communication only after detection of calling tone signals on the communications link. Such signals indicate a remote DTE desires to establish a data communications path with the local DTE. This operation advantageously prevents the modem from transmitting an annoying answer tone to a calling party.
REFERENCES:
patent: 4512013 (1985-04-01), Nash et al.
patent: 4546212 (1985-10-01), Crowder, Sr.
patent: 4663778 (1987-05-01), Takahashi
patent: 4672602 (1987-06-01), Hargrave et al.
patent: 4757495 (1988-07-01), Decker et al.
patent: 4821312 (1989-04-01), Horton et al.
patent: 4908851 (1990-03-01), Kotani et al.
patent: 5022071 (1991-06-01), Mozer et al.
patent: 5023903 (1991-06-01), Bowen
patent: 5131026 (1992-07-01), Park
patent: 5146489 (1992-09-01), Telibasa
patent: 5202915 (1993-04-01), Nishii
Chapman Joseph Q.
Holmquist Kurt E.
AT&T IPM Corp.
Chan Wing F.
Padnes David R.
Verlangieri Patricia A.
Woo Stella L.
LandOfFree
Call establishment for simultaneous analog and digital communica does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Call establishment for simultaneous analog and digital communica, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Call establishment for simultaneous analog and digital communica will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1380064