Frederick P Block, Norman C Chan: Reliable database administration arrangement. AT&T Bell Laboratories, David Volejnicek, August 4, 1992: US05136707 (84 worldwide citation)

In a distributed system, such as a PBX (FIG. 1), which uses a database for its operation, a master copy (22) of the database having a first format is stored at a central node (10) and cache copies (32) of database portions (24) but having a different format are stored at peripheral nodes (11-12). A ...

Norman C Chan: Efficient transmission of voice silence intervals. Lucent Technologies, David Volejnicek, April 27, 1999: US05897613 (72 worldwide citation)

A silence-suppression scheme for a packet voice transmission system (FIG. 1) accurately regenerates the silence signals at the receiving end. The following discipline is implemented at the transmitting end (100): if speech is detected (200), transmit (204) a packet carrying the speech; if silence is ...

Norman C Chan, Leif K Pederson: Telephone switching system adjunct call processing arrangement. AT&T Company, AT&T Information Systems, James M Graziano, March 24, 1987: US04653085 (54 worldwide citation)

The adjunct call processing arrangement of our invention eliminates the separation between hard-wired telephone switching system computer facilities and customer owned switchably connectable computer facilities. A general purpose communication interface is provided which connects the customer provid ...

Norman C Chan: Method and apparatus for generating automatic greetings in a call center. Avaya Technology, Sheridan Ross P C, August 2, 2005: US06925166 (40 worldwide citation)

A call center includes a message playback unit for playing back a prerecorded greeting during an outgoing call while a call classifier unit within the call center processes an audible signal received from a remote party location. A call processing unit places a call to a remote party location via a ...

Norman C Chan: Apparatus and method for storage and accelerated playback of voice samples in a call center. Avaya Technology, Sheridan Ross P C, October 22, 2002: US06470077 (40 worldwide citation)

A call center includes a recording/playback unit for recording audible signals received (during an outgoing call) from a remote party location, while a call classifier unit within the call center processes the audible signals. A call processing unit places a call to a remote party location via a com ...

Raymond B Bischoff, Norman C Chan: Automatic administration of a telecommunication system. AT&T Bell Laboratories, David Volejnicek, September 25, 1990: US04959856 (29 worldwide citation)

Administration of a communication system having a plurality of addressable communication ports is accomplished automatically, by the system itself. The system is initially provisioned only with unlinked terminal translations. Establishment of hardware translations and their linking to the terminal t ...

Norman C Chan, Rickie E Meis: Method and apparatus for suppressing music on hold. Avaya Technology, Sheridan Ross P C, March 22, 2005: US06870807 (14 worldwide citation)

The subject invention is directed to a method and system for removing music or other unwanted noise from a conference call particularly when the music or other unwanted noise is not directly under the control of the telecommunication equipment the user is attached to and using. The method and system ...

Norman C Chan, Norman W Petty: Arrangement for performing automatic build out in a communications system that supports multiple constant-bit-rate connections. Avaya Technology, John C Moran, July 23, 2002: US06424651 (4 worldwide citation)

In an asynchronous transfer mode (ATM) disassembler unit that is receiving ATM cells from an optical interface and converting data from these cells onto a constant bit rate (CBR) call, only a nominal predefined build out is defined for each optical interface. If an ATM cell is not received within th ...

Norman C Chan, SuJeanne Foster: Method and apparatus for performing echo cancellation within a communication network. Avaya Technology, Sheridan Ross P C, September 12, 2006: US07106856 (2 worldwide citation)

A switching center for use in a communication network includes a pool of echo cancellation units for use in providing echo cancellation services to users associated with the switching center on an “as needed” basis. A communication connection being supported by the switching center is analyzed to de ...

Michael Kenneth Brown, Norman C Chan, Sharmistha Sarkar Das, David Joseph Skiba, Danny M Wages: Call classifier using automatic speech recognition to separately process speech and tones. John C Moran Attorney PC, May 8, 2003: US20030086541-A1 (1 worldwide citation)

Classifying a call to a called destination endpoint by a call classifier. The call classifier is responsive to information received from the called destination endpoint to perform the call classification.