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Class Information
Number: 379/233
Name: Telephonic communications > Plural exchange network or interconnection > Interexchange signalling > Central office-to-pbx signalling > Direct inward dialing
Description: Subject matter wherein a call address designating a terminal connected to a private branch exchange will control connection to such a terminal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7231032 |
Negotiated routing in telephony systems |
Jun. 12, 2007 |
| 7139585 |
Wireless communication apparatus and system |
Nov. 21, 2006 |
| 7095839 |
Switching system with separate control connection to remote branch exchanges |
Aug. 22, 2006 |
| 7072459 |
Method and apparatus for Web direct-dialing connection |
Jul. 4, 2006 |
| 7020264 |
Negotiated routing in telephony systems |
Mar. 28, 2006 |
| 6917679 |
Method for interface ISDN private automatic branch exchange and local exchange |
Jul. 12, 2005 |
| 6882722 |
Virtual private communications network |
Apr. 19, 2005 |
| 6873700 |
System and method for announcing a message through a private branch exchange |
Mar. 29, 2005 |
| 6834105 |
Method for operating a private telecommunications network |
Dec. 21, 2004 |
| 6826407 |
System and method for integrating audio and visual messaging |
Nov. 30, 2004 |
| 6763102 |
Method for handling incoming calls directed to a virtual communication service subscriber via a guest PBX |
Jul. 13, 2004 |
| 6751309 |
Method and apparatus for extending calls to internal switch extensions out to external network endpoints |
Jun. 15, 2004 |
| 6748071 |
Method and apparatus for treating externally-originated calls as coming from internal switch extensions |
Jun. 8, 2004 |
| 6744880 |
Method for creating a telephone digital switching platform |
Jun. 1, 2004 |
| 6546083 |
System and method for placing a telephone call |
Apr. 8, 2003 |
| 6516061 |
System for and method of extending a PBX phone port to a remote phone device |
Feb. 4, 2003 |
| 6480596 |
Direct inward-outward dialing trunk circuit |
Nov. 12, 2002 |
| 6256381 |
System and method for identifying a data record associated with a transferred telephone call |
Jul. 3, 2001 |
| 6169797 |
Method for setting up telecommunication connections |
Jan. 2, 2001 |
| 6122360 |
Negotiated routing in telephony systems |
Sep. 19, 2000 |
| 6075852 |
Telecommunications system and method for processing call-independent signalling transactions |
Jun. 13, 2000 |
| 6069942 |
Method for the legitimacy check of call numbers of calls incoming at a communication system |
May. 30, 2000 |
| 6009159 |
Apparatus, method and system for controlling the start of alerting of multiple leg telecommunication sessions |
Dec. 28, 1999 |
| 6005931 |
Negotiated routing in telephony systems |
Dec. 21, 1999 |
| 6005930 |
Apparatus, method and system for controlling secondary treatment by a distant switch for multiple leg telecommunication sessions |
Dec. 21, 1999 |
| 5930346 |
Extended public switched telephone network architecture with enhanced subscriber control on call setup |
Jul. 27, 1999 |
| 5889846 |
Method and system for initiating a software defined network call via a network adjunct platform |
Mar. 30, 1999 |
| 5818908 |
Selective voice menu system |
Oct. 6, 1998 |
| 5815564 |
System for connecting an incoming call to a selected one of a number of extensions |
Sep. 29, 1998 |
| 5793858 |
Method for improving call completion rates in telephony |
Aug. 11, 1998 |
| 5784450 |
Method of establishing a connection to a subscriber through a first network, as well as service computer, switching facility, and terminal |
Jul. 21, 1998 |
| 5717746 |
Designated channel terminating method and apparatus |
Feb. 10, 1998 |
| 5668855 |
Message management system |
Sep. 16, 1997 |
| 5666401 |
Automated attendant call processor |
Sep. 9, 1997 |
| 5615255 |
Method and apparatus for measuring loads in a common channel signalling link |
Mar. 25, 1997 |
| 5610976 |
Dual channel ISDN terminal call identification and switching system |
Mar. 11, 1997 |
| 5586169 |
Method of ringing a call responsive apparatus which answered an immediately preceding incoming call |
Dec. 17, 1996 |
| 5572585 |
Communication system and call processing method |
Nov. 5, 1996 |
| 5563940 |
System for connecting an incoming call to a selected one of a number of extensions |
Oct. 8, 1996 |
| 5557659 |
Electronic mail system having integrated voice messages |
Sep. 17, 1996 |
| 5550913 |
Network terminating unit for connecting analog and digital communication systems to a digital network |
Aug. 27, 1996 |
| 5541992 |
System for connecting an incoming call to a selected one of a number of extensions |
Jul. 30, 1996 |
| 5535269 |
Additional direct inward dialing connection system |
Jul. 9, 1996 |
| 5515422 |
Automated attendant for any combination of PBX, centrex and single-line telephones |
May. 7, 1996 |
| 5481589 |
Detection of TDD signals in an automated telephone system |
Jan. 2, 1996 |
| 5481605 |
Private branch exchange capable of analyzing information received from ISDN |
Jan. 2, 1996 |
| 5450488 |
Multiple service voice messaging system |
Sep. 12, 1995 |
| 5357558 |
Radio communication apparatus for ISDN |
Oct. 18, 1994 |
| 5339356 |
Virtual private network connecting system |
Aug. 16, 1994 |
| 5317628 |
Message management system |
May. 31, 1994 |
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