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Class Information
Number: 379/198
Name: Telephonic communications > Call or terminal access alarm or control > At switching center > Pbx
Description: Subject matter wherein the switching center is a private branch exchange.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7602770 |
Telecommunication terminal identification on a switching system |
Oct. 13, 2009 |
| 7570747 |
Private branch exchange (PBX), voice store equipment, message processing method, program and recording medium |
Aug. 4, 2009 |
| 7565159 |
Methods and arrangement for implementing an active call handover by employing a switching component |
Jul. 21, 2009 |
| 7518984 |
IP-PBX, IP-PBX system, IP terminal control program |
Apr. 14, 2009 |
| 7450703 |
Acceptance of inputs from various interfaces to a telephony system |
Nov. 11, 2008 |
| 7447301 |
Toll-free number blocking override indicator |
Nov. 4, 2008 |
| 7440566 |
Internet protocol compliant private branch electronic exchange and a method for redundantly configuring terminal interfaces |
Oct. 21, 2008 |
| 7440558 |
Telephony security system |
Oct. 21, 2008 |
| 7418089 |
System and method for restricting and monitoring telephone calls |
Aug. 26, 2008 |
| 7403766 |
Telecommunication call management and monitoring system with voiceprint verification |
Jul. 22, 2008 |
| 7352849 |
SMS switching private branch exchange system and method |
Apr. 1, 2008 |
| 7324506 |
Using DSL services to facilitate real-time communications in enterprise networks |
Jan. 29, 2008 |
| 7308255 |
Extending mobile phone networks |
Dec. 11, 2007 |
| 7272386 |
System and method for providing location and call back information for special number calls from phone sets serviced by a privately served network |
Sep. 18, 2007 |
| 7248679 |
Apparatus and method for transmitting-receiving CID in a PBX |
Jul. 24, 2007 |
| 7236579 |
Universal call-log system and method for a home network telephone |
Jun. 26, 2007 |
| 7231027 |
Encapsulation, compression, and encryption of PCM data |
Jun. 12, 2007 |
| 7218718 |
Method to perform a telecommunication with dialing destination preview |
May. 15, 2007 |
| 7155001 |
System and method for restricting and monitoring telephone calls |
Dec. 26, 2006 |
| 7133514 |
Premise-based voice bridge extension |
Nov. 7, 2006 |
| 7076053 |
System for the processing of audio data used for music on hold and paging in a private branch exchange |
Jul. 11, 2006 |
| 7031445 |
Distributed redirect server |
Apr. 18, 2006 |
| 7006614 |
Systems and methods for voice and data communications including hybrid key system/PBX functionality |
Feb. 28, 2006 |
| 6931533 |
Removable hardware device authentication system and method |
Aug. 16, 2005 |
| 6912273 |
PBX switch incorporating methods and apparatus for automatically detecting call appearance values for each primary directory number on a basic rate interface |
Jun. 28, 2005 |
| 6882714 |
Universal call-log system and method for a home network telephone |
Apr. 19, 2005 |
| 6870908 |
Voice storage device and incoming call answering system |
Mar. 22, 2005 |
| 6813347 |
Selective call waiting |
Nov. 2, 2004 |
| 6807261 |
Digital key telephone set and digital key telephone system |
Oct. 19, 2004 |
| 6804329 |
Methods and apparatus for enabling a non-DID station of a PBX or MLTS to receive a PSAP call back |
Oct. 12, 2004 |
| 6760420 |
Telephony security system |
Jul. 6, 2004 |
| 6760421 |
Telephony security system |
Jul. 6, 2004 |
| 6724874 |
Outgoing call screening |
Apr. 20, 2004 |
| 6714640 |
Communication system, exchange and extension call processing method |
Mar. 30, 2004 |
| 6707897 |
Private branch exchange |
Mar. 16, 2004 |
| 6700964 |
Encapsulation, compression and encryption of PCM data |
Mar. 2, 2004 |
| 6700974 |
Switching power supply for generating a ringing voltage |
Mar. 2, 2004 |
| 6687354 |
Method and arrangement for connection of a computer to a computer network via a telephone exchange |
Feb. 3, 2004 |
| 6643357 |
Distributed redirect server |
Nov. 4, 2003 |
| 6618476 |
Line information security interface for TAPI service provider |
Sep. 9, 2003 |
| 6567505 |
Method and apparatus for camp-on service control |
May. 20, 2003 |
| 6567508 |
Communication device |
May. 20, 2003 |
| 6556663 |
Guestroom telephone having single action message retrieval |
Apr. 29, 2003 |
| 6553102 |
System and method for fully integrating multiple business telephone systems with a single voice mail system |
Apr. 22, 2003 |
| 6516058 |
Voice network access system |
Feb. 4, 2003 |
| 6493436 |
System for correcting failures of music on transfer |
Dec. 10, 2002 |
| 6480596 |
Direct inward-outward dialing trunk circuit |
Nov. 12, 2002 |
| 6424700 |
Network based distributed PBX with connection loss survival features |
Jul. 23, 2002 |
| 6396905 |
Method and apparatus for routing blocked telephone calls |
May. 28, 2002 |
| 6366656 |
Method and apparatus for migrating embedded PBX system to personal computer |
Apr. 2, 2002 |
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