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Class Information
Number: 379/165
Name: Telephonic communications > Multi-line or key substation system with selective switching and central switching office connection > Switching or supervision feature (e.g., common control, digital)
Description: Subject matter which provides for connection control or signalling within a telephone key system.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7616626 |
Telephone exchange apparatus and control method for telephone exchange apparatus |
Nov. 10, 2009 |
| 7567656 |
Telephone communication apparatus |
Jul. 28, 2009 |
| 7421071 |
Call progress tone generation in a communication system |
Sep. 2, 2008 |
| 7415103 |
Method and configuration for controlling and/or monitoring a terminal connected to a communications system |
Aug. 19, 2008 |
| 7308086 |
Telephone communication apparatus |
Dec. 11, 2007 |
| 7289615 |
Private branch exchange and private branch exchange control method |
Oct. 30, 2007 |
| 7248679 |
Apparatus and method for transmitting-receiving CID in a PBX |
Jul. 24, 2007 |
| 7245607 |
Apparatus and method for telephony feature access and gatekeeper policy interaction on combined ToL/PBX systems |
Jul. 17, 2007 |
| 7203304 |
Call progress tone generation in a communication system |
Apr. 10, 2007 |
| 7194074 |
Key telephone system, key telephone, interface unit, and transmission scheme determination method |
Mar. 20, 2007 |
| 7139375 |
Highway expansion apparatus for key telephone system and operation method thereof |
Nov. 21, 2006 |
| 7113587 |
Method and apparatus for non-disruptive telecommunication loop condition determination |
Sep. 26, 2006 |
| 7069047 |
System and method for on-line insertion of line replaceable units in wireless and wireline access systems |
Jun. 27, 2006 |
| 7050564 |
Call progress tone generation in a communication system |
May. 23, 2006 |
| 7050556 |
Key telephone unit and key telephone system |
May. 23, 2006 |
| 7006614 |
Systems and methods for voice and data communications including hybrid key system/PBX functionality |
Feb. 28, 2006 |
| 6990183 |
Multiple platform voice processing system with optimized resource allocation |
Jan. 24, 2006 |
| 6978008 |
Zero crossing detection circuit |
Dec. 20, 2005 |
| 6975713 |
Providing multiple line functionality using alternative network telephony |
Dec. 13, 2005 |
| 6952468 |
Method for providing call-connected party's information in private exchange network |
Oct. 4, 2005 |
| 6882715 |
Method and apparatus for communication with a gate entry controller and providing secure communication |
Apr. 19, 2005 |
| 6876732 |
Service providing method for electronic device, customer center, and user system |
Apr. 5, 2005 |
| 6836543 |
Operating surface for class functions in a telephone |
Dec. 28, 2004 |
| 6807262 |
Central office control of receive and transmit handset volume |
Oct. 19, 2004 |
| 6807261 |
Digital key telephone set and digital key telephone system |
Oct. 19, 2004 |
| 6661883 |
Method and apparatus allowing remote key system units to interoperate |
Dec. 9, 2003 |
| 6650744 |
Method and apparatus for broadcasting audio in a communication system |
Nov. 18, 2003 |
| 6633631 |
Digital key telephone system and extension terminal device thereof |
Oct. 14, 2003 |
| 6625269 |
Method of monitoring digital line signal in private exchange system |
Sep. 23, 2003 |
| 6625272 |
Telemanagement system with single point of entry |
Sep. 23, 2003 |
| 6496576 |
Digital key telephone system and extension terminal device thereof |
Dec. 17, 2002 |
| 6490346 |
Apparatus and method for providing music-on-hold service in key telephone system |
Dec. 3, 2002 |
| 6477248 |
Multi-line station interface |
Nov. 5, 2002 |
| 6459781 |
Key telephone apparatus with call distribution function |
Oct. 1, 2002 |
| 6456705 |
Digital key telephone system and extension terminal device thereof |
Sep. 24, 2002 |
| 6430280 |
Telephone main unit and telephone control apparatus |
Aug. 6, 2002 |
| 6421436 |
Multiline telephone apparatus |
Jul. 16, 2002 |
| 6411700 |
Telemanagement system with single point of entry |
Jun. 25, 2002 |
| 6373924 |
Digital key telephone system and extension terminal device thereof |
Apr. 16, 2002 |
| 6304645 |
Call processing system with resources on multiple platforms |
Oct. 16, 2001 |
| 6289089 |
Key telephone system with cordless terminals |
Sep. 11, 2001 |
| 6263063 |
System and method for provisioning an extra line on demand and for selectively connecting calls with a plurality of devices |
Jul. 17, 2001 |
| 6263061 |
Digital button telephone system and extension terminal for the same |
Jul. 17, 2001 |
| 6249571 |
Telemanagement system with modular features and database synchronization |
Jun. 19, 2001 |
| 6226371 |
Communication system with assembly carrier unit |
May. 1, 2001 |
| 6226369 |
Telephone with novel FSK decoding means, simultaneous off-hook caller ID reception means, and set of configurable function key means |
May. 1, 2001 |
| 6188755 |
Key telephone system having a plurality of telephone numbers to key telephone set |
Feb. 13, 2001 |
| 6175617 |
Key telephone apparatus with [automatic] call distribution function |
Jan. 16, 2001 |
| 6167262 |
Communication apparatus |
Dec. 26, 2000 |
| 6128371 |
Multiple-service offering communication terminal and multiple-service offering apparatus |
Oct. 3, 2000 |
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