Call forwarding arrangement

US4893336A · kind A · utility

Assignee

• American Telephone and Telegraph Company, AT&T Bell Laboratories · US

Inventor

• Mark Wuthnow · Austin, US

Key dates

• Filing date: Dec 17, 1987
• Grant date: Jan 9, 1990
• Expiry date: Dec 17, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S379/911
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An improved call forwarding arrangement where forwarded calls receive different terminating treatment from non-forwarded calls, for example providing a readily detectable, distinctive alerting signal for forwarded calls or completing only forwarded calls to a station and denying or forwarding other calls without requiring any customer involvement. The arrangement provides an improved call forwarding service for customers with advanced station display capabilities and, in addition, allows selective answering of only forwarded calls by customers that have conventional, analog station equipment. Both switch-based and station-based implements are disclosed.