Communication channel reservation

US4958343A · kind A · utility

Assignee

• AT&T Bell Laboratories · US

Inventors

• Gabriela M. Abramovici · Bellwood, US
• Rolfe E. Buhrke · Westchester, US
• Bopsi Chandramouli · Deerfield, US
• Robert Dianda · Colorado Springs, US
• Leo R. Katzenstein · Naperville, US
• Thomas M. O'Connor · Holiday, US
• Timothy G. Rinker · Naperville, US
• Susan J. Tripp · Warrenville, US

Key dates

• Filing date: Nov 30, 1988
• Grant date: Sep 18, 1990
• Expiry date: Nov 30, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q11/0428
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A call processing method and apparatus for maximizing the number of calls that are offered to terminals sharing a digital subscriber line while insuring that for every call offered, a channel of the digital subscriber line remains allocatable to at least one terminal addressed by the call for use in answering the call. The switching system reserves a channel of the digital subscriber line in response to an incoming call. This channel is reserved for a set of terminals that share the digital subscriber line and that are addressed by the incoming call. This reservation entitles one of the terminals to be allocated a channel to originate or answer calls.