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Class Information
Number: 379/156
Name: Telephonic communications > Multi-line or key substation system with selective switching and central switching office connection
Description: Subject matter including circuitry for allowing a subscriber terminal to be selectively connected to one of a plurality of lines, at least one of which is a public telephone line.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7321586 |
Method for establishing communication links in an exchange in a switching system |
Jan. 22, 2008 |
| 7308086 |
Telephone communication apparatus |
Dec. 11, 2007 |
| 7301940 |
Dual-use packet/analog phone or phone-adapter in a packet telephony distribution system |
Nov. 27, 2007 |
| 7257211 |
Method and apparatus for controlling and/or monitoring a MULAP line |
Aug. 14, 2007 |
| 7200383 |
Subscriber authentication for unlicensed mobile access signaling |
Apr. 3, 2007 |
| 7194074 |
Key telephone system, key telephone, interface unit, and transmission scheme determination method |
Mar. 20, 2007 |
| 7190778 |
Communication system and keyset therefore capable of identifying selected user locations |
Mar. 13, 2007 |
| 7139375 |
Highway expansion apparatus for key telephone system and operation method thereof |
Nov. 21, 2006 |
| 7088807 |
Call pick-up system and method of a switching device |
Aug. 8, 2006 |
| 7050556 |
Key telephone unit and key telephone system |
May. 23, 2006 |
| 7013007 |
Computer telephony power supply method and apparatus |
Mar. 14, 2006 |
| 7010105 |
Format-converting device and private branch exchange system using the same, and format-converting method and memory medium storing a program to allow computer to execute the same method |
Mar. 7, 2006 |
| 7006614 |
Systems and methods for voice and data communications including hybrid key system/PBX functionality |
Feb. 28, 2006 |
| 7003081 |
Priority based methods and apparatus for transmitting accurate emergency location identification numbers (ELINs) from behind a multi-line telephone system (MLTS) |
Feb. 21, 2006 |
| 6980634 |
Telephone circuit controller apparatus |
Dec. 27, 2005 |
| 6978000 |
Key telephone system and interface unit for key telephone |
Dec. 20, 2005 |
| 6975713 |
Providing multiple line functionality using alternative network telephony |
Dec. 13, 2005 |
| 6891937 |
Method and apparatus for administration of circuit inventories in telecommunication networks |
May. 10, 2005 |
| 6882719 |
Method for providing outgoing call reservation service in exchange system |
Apr. 19, 2005 |
| 6876732 |
Service providing method for electronic device, customer center, and user system |
Apr. 5, 2005 |
| 6816589 |
Dynamic communications groups |
Nov. 9, 2004 |
| 6807261 |
Digital key telephone set and digital key telephone system |
Oct. 19, 2004 |
| 6807262 |
Central office control of receive and transmit handset volume |
Oct. 19, 2004 |
| 6801609 |
Telephone system with programmable line appearances |
Oct. 5, 2004 |
| 6697358 |
Emulation of phone extensions in a packet telephony distribution system |
Feb. 24, 2004 |
| 6674842 |
Multi-line telephone with input/output mixing and audio control |
Jan. 6, 2004 |
| 6668047 |
Key telephone system and maintenance method therefor |
Dec. 23, 2003 |
| 6661883 |
Method and apparatus allowing remote key system units to interoperate |
Dec. 9, 2003 |
| 6636595 |
Non-KSU message delivery system |
Oct. 21, 2003 |
| 6636586 |
Telephone set device capable of vocalizing a telephone number being called |
Oct. 21, 2003 |
| 6625269 |
Method of monitoring digital line signal in private exchange system |
Sep. 23, 2003 |
| 6591114 |
Fixed cellular communications system |
Jul. 8, 2003 |
| 6570976 |
Multimedia private branch exchanger and private branch exchange system |
May. 27, 2003 |
| 6560464 |
Telephone switching system and method |
May. 6, 2003 |
| 6553101 |
DOS-based card-type voice mail system |
Apr. 22, 2003 |
| 6522737 |
System and method of operation for a telecommunications patch system |
Feb. 18, 2003 |
| 6498842 |
Switching system between a call center and public network |
Dec. 24, 2002 |
| 6496576 |
Digital key telephone system and extension terminal device thereof |
Dec. 17, 2002 |
| 6493439 |
Analog caller identification transmission method and apparatus |
Dec. 10, 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 |
| 6377671 |
Digital key telephone system and extension terminal device thereof |
Apr. 23, 2002 |
| 6356330 |
Active matrix liquid crystal display device |
Mar. 12, 2002 |
| 6330307 |
Display panel overlay structure and method for tracing interface modules in a telecommunications patch system |
Dec. 11, 2001 |
| 6304644 |
Apparatus and method for cost effective caller identification and call-waiting for a multi-line telephone |
Oct. 16, 2001 |
| 6301345 |
Key telephone system and maintenance method therefor |
Oct. 9, 2001 |
| 6292549 |
Analog caller identification transmission method and apparatus |
Sep. 18, 2001 |
| 6289089 |
Key telephone system with cordless terminals |
Sep. 11, 2001 |
| 6263059 |
Communication apparatus and storage medium |
Jul. 17, 2001 |
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