1
Fen Chung Kung, Anish Sankalia, Hopeton Walker, Spencer Wang: Method for billing IP broadband subscribers. AT&T, August 10, 2004: US06775267 (342 worldwide citation)

A method of billing a variable bit rate communication between a first terminal and a distant terminal to a broadband subscriber permits changing billing parameters during a call in real time in response to user inputs including user requested changes in quality of service, changes in data rate and c ...


2
Fen Chung Kung, Jesse Eugene Russell, Hopeton Walker, Spencer Wang: Personal user network (closed user network) PUN/CUN. AT&T, June 26, 2001: US06252952 (274 worldwide citation)

An Internet Protocol Telephony Network and public switched telephone network, in which closed user groups may be dynamically defined and modified to take advantage of special billing within the closed user groups. Abbreviated dialing within the closed user groups may also be used to make dialing mor ...


3
Fen Chung Kung, Anish Sankalia, Hopeton Walker, Spencer Wang: Method for billing IP broadband subscribers. AT&T, October 30, 2007: US07289489 (218 worldwide citation)

A method of billing a variable bit rate communication between a first terminal and a distant terminal to a broadband subscriber permits changing billing parameters during a call in real time in response to user inputs including user requested changes in quality of service, changes in data rate and c ...


4
Fen Chung Kung, Jesse Eugene Russell, Anish Sankalia, Hopeton Walker, Spencer Wang: Enhanced subscriber IP alerting. AT&T, November 30, 2004: US06826173 (179 worldwide citation)

A method of alerting a user of a variable bit rate communication between a first terminal and a distant terminal over alternative networks including a circuit switched network and a packet network permits the user the opportunity to change alerting preferences from a remote location or locally and t ...


5
Fen Chung Kung, Anish Sankalia, Hopeton Walker, Spencer Wang: Method for billing IP broadband subscribers. AT&T Intellectual Property II, July 20, 2010: US07760711 (155 worldwide citation)

A method of billing a variable bit rate communication between a first terminal and a distant terminal to a broadband subscriber permits changing billing parameters during a call in real time in response to user inputs including user requested changes in quality of service, changes in data rate and c ...


6
Fen Chung Kung, Hopeton Walker, Spencer Wang: IP conference call waiting. AT&T, November 9, 2004: US06816469 (141 worldwide citation)

An Internet Protocol Telephony Network and public switched telephone network that allows one or more call waiting callers to dynamically join in an existing and to establish a multiple-party conference call including the call waiting call. A call waiting call may also be added to an existing confere ...


7
Fen Chung Kung, Jesse Eugene Russell, Hopeton Walker, Spencer Wang: Protected IP telephony calls using encryption. AT&T, May 3, 2005: US06889321 (93 worldwide citation)

Communication information transmitted in the broadband communication system may be in a packet format and secured using encryption techniques, for example encryption software, including a means for providing an initial security key and updated security keys to the various pieces of communication equ ...


8
Fen Chung Kung, Jesse Eugene Russell, Hopeton Walker, Spencer Wang: Simplified IP service control. AT&T, August 10, 2004: US06775273 (82 worldwide citation)

The present invention includes a number of systems and techniques for service control for a broadband communications system that includes voice, data and multimedia audio and video communication. One variation of the present invention includes service control based on multiple relationships between ...


9
Fen Chung Kung, Jesse E Russell, Hopeton Walker, Spencer C Wang: Multiple call waiting in a packetized communication system. AT&T, Banner & Witcoff, October 14, 2003: US06633635 (77 worldwide citation)

In a packetized communications system call waiting functionality is expanded to provide for handling of unlimited calls concurrently of one or more service types. When a subscriber is engaged in an ongoing call, incoming calls can be placed on a call queue by a call manager such that bandwidth and o ...


10
Albert Chow, Jinman Kim, Hopeton Walker, Spencer Wang, Wenchu Ying: Programmable ring-call forwarding in a wireless centrex services system. AT&T, June 3, 2003: US06574470 (76 worldwide citation)

The instant invention discloses a method and system for providing a novel wireless centrex service that untethers subscribers from the immobility associated with traditional desktop telephones. Essentially, the present invention extends the benefits of wireless voice and data services to subscribers ...