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Class Information
Number: 379/207.05
Name: Telephonic communications > Special services > Service trigger (activation or deactivation) > Line or loop condition > Busy signal (e.g., off hook)
Description: Subject matter wherein the implementation of a service is controlled in response to receiving an indication that a called party is unavailable.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7474745 |
System and method to handle phone line services during modem dial-up connection |
Jan. 6, 2009 |
| 7327838 |
System and method for integrating call delivery for fixed-site and mobility services |
Feb. 5, 2008 |
| 7301661 |
Communication terminal device and method of controlling same |
Nov. 27, 2007 |
| 6947730 |
Method enabling mobile telephones to have automatic multiple telephone number dialing capability to a same called party |
Sep. 20, 2005 |
| 6922465 |
Method and system for reporting events in telecommunication networks |
Jul. 26, 2005 |
| 6823057 |
Methods and apparatus for notifying subscriber's of forwarded calls |
Nov. 23, 2004 |
| 6563915 |
Method and apparatus for an automatic barge-in system |
May. 13, 2003 |
| 6418217 |
Arrived call receiving system for supporting reception services using telephone and receiving method therefor |
Jul. 9, 2002 |
| 6324281 |
Procedure for the processing of an unexpected disconnect request |
Nov. 27, 2001 |
| 6208723 |
System and method for enhanced automatic recall |
Mar. 27, 2001 |
| 6088440 |
Method and apparatus for operating a telephone exchange having selectable audio sources |
Jul. 11, 2000 |
| 6023505 |
System and method for providing a busy signal to a communication |
Feb. 8, 2000 |
| 5761277 |
personal mobile communication system |
Jun. 2, 1998 |
| 5737403 |
Interaction of routing features in a telephone system |
Apr. 7, 1998 |
| 5712902 |
Telecommunications answering feature method and apparatus |
Jan. 27, 1998 |
| 5668861 |
Telecommunications system with notification hold |
Sep. 16, 1997 |
| 5640449 |
Communications device to establish call in ISDN system |
Jun. 17, 1997 |
| 5583564 |
Intelligent call forwarding with videophone display of forwarding destination |
Dec. 10, 1996 |
| 5530931 |
Method and apparatus for providing a look ahead feature for enhanced call forwarding in a telecommunications system |
Jun. 25, 1996 |
| 5499287 |
FAX-telephone interface circuit |
Mar. 12, 1996 |
| 5479495 |
Method and system for automatically accessing and invoking switch-based services in an advanced intelligent network |
Dec. 26, 1995 |
| 5408527 |
Exchange system and method of connecting calls in said exchange system |
Apr. 18, 1995 |
| 5341414 |
Calling number verification service |
Aug. 23, 1994 |
| 5315649 |
Toll call telephone service center |
May. 24, 1994 |
| 5309512 |
Call waiting deluxe feature |
May. 3, 1994 |
| 5303290 |
System for elminating glare in virtual private line circuits |
Apr. 12, 1994 |
| 5197096 |
Switching method and apparatus having subscriber state management function |
Mar. 23, 1993 |
| 5195131 |
Private branch exchange system |
Mar. 16, 1993 |
| 5027384 |
Personalized automatic call routing |
Jun. 25, 1991 |
| 5023868 |
Automated call handling apparatus |
Jun. 11, 1991 |
| 5018194 |
Electronic switching system having call-forwarding function |
May. 21, 1991 |
| 4873717 |
Call coverage arrangement |
Oct. 10, 1989 |
| 4807279 |
Remotely programmable call forwarding control device |
Feb. 21, 1989 |
| 4768224 |
Single telephone line call forwarding device |
Aug. 30, 1988 |
| 4723273 |
Discretionary call forwarding |
Feb. 2, 1988 |
| 4703499 |
Distributed privacy oriented telephone extension system |
Oct. 27, 1987 |
| 4677663 |
Telephone answering and call forwarding improvement |
Jun. 30, 1987 |
| 4640988 |
Telephone interrupter |
Feb. 3, 1987 |
| 4629832 |
Communication system administration method and circuitry |
Dec. 16, 1986 |
| 4590331 |
Hostage negotiation telephone system |
May. 20, 1986 |
| 4567323 |
Method and apparatus for providing a plurality of special services |
Jan. 28, 1986 |
| 4166929 |
Interoffice callback arrangement |
Sep. 4, 1979 |
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