Patent US4893336A successfully refreshed from Google Patents.
US4893336A
Expired / Lapsed
US
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Call forwarding arrangement
Assignee: Nokia Bell Labs
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Filing: 1987-12-17
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Granted: 1990-01-09
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Expires: 2007-12-17
Abstract
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.
Inventors
- 👤 Mark S. Wuthnow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:25
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/436; H04M3/54; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; Y; Y10; Y10S; Y10S379/00; Y10S379/911
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
A call processing method comprising determining whether a call to a communication station is a forwarded call and completing said call to said station only in response to a determination that said call is a forwarded call wherein said station is connected to a switch and wherein said method is performed by said station.
Claim 2
Dependent Claim
54 words
A call processing method comprising determining whether a call to a communication station is a forwarded call and completing said call to said station only in response to a determination that said call is a forwarded call wherein said station is connected to a switch and wherein said method is performed by said station.
Claim 3
Dependent Claim
28 words
A method in accordance with claim 1 further comprising in response to a determination that said call is a non-forwarded call, forwarding said call to another communication station.
Claim 4
Dependent Claim
24 words
A method in accordance with claim 1 further comprising in response to a determination that said call is a non-forwarded call, denying said call.
Claim 5
Dependent Claim
36 words
A method in accordance with claim 1 further comprising in response to said determination that said call is a forwarded call, effecting generation of an alerting signal distinctive from an alerting signal for a non-forwarded call.
Claim 6
Independent Claim
120 words
A method of processing a call to a communication station comprising determining whether said call is a forwarded call; in response to a determination that said call is a forwarded call, performing at least one of the following steps (A) and (B): (A) effecting generation of an altering signal distinctive from an alerting signal for a non-forwarded call, and (B) completing said call to said station; and in response to a determination that said call is a non-forwarded call, performing one of the following steps (C) and (D): (C) denying said call, and (D) forwarding said call to another communication station wherein said first-mentioned station is connected to a switch and wherein said method is performed by said first-mentioned station.
Claim 7
Independent Claim
120 words
A method of processing a call to a communication station comprising determining whether said call is a forwarded call; in response to a determination that said call is a forwarded call, performing at least one of the following steps (A) and (B): (A) effecting generation of an altering signal distinctive from an alerting signal for a non-forwarded call, and (B) completing said call to said station; and in response to a determination that said call is a non-forwarded call, performing one of the following steps (C) and (D): (C) denying said call, and (D) forwarding said call to another communication station wherein said first-mentioned station is connected to a switch and wherein said method is performed by said first-mentioned station.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |