Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Reexamination Certificate
2006-05-23
2006-05-23
Tsang, Fan (Department: 2645)
Telephonic communications
Plural exchange network or interconnection
Interexchange signalling
C379S211020, C379S211010, C455S433000, C455S445000
Reexamination Certificate
active
07050563
ABSTRACT:
A variety of methods and systems can be used to avoid a hairpin loop scenario. For example, in a system involving a redirecting switch and a service platform switch, correlation between calling party identities for outgoing and incoming call legs can be done to identify a potential hairpin loop scenario. Upon detection of such a scenario, appropriate call legs can be released while routing the call to its destination. Correlation information can be collected from available call setup signaling parameters. The methods and systems can be applied, for example, to systems involving directory assistance call completion, voice-activated dialing, voicemail callback, and prepaid services.
REFERENCES:
patent: 5018194 (1991-05-01), Suzuki et al.
patent: 5550911 (1996-08-01), Bhagat et al.
patent: 5664010 (1997-09-01), Walker et al.
patent: 5790638 (1998-08-01), Bertacchi
patent: 5805691 (1998-09-01), Dendi
patent: 5881145 (1999-03-01), Giuhat et al.
patent: 5881179 (1999-03-01), Gillard
patent: 5884179 (1999-03-01), Patel
patent: 5995610 (1999-11-01), Smidt et al.
patent: 6052589 (2000-04-01), Persson et al.
patent: 6078648 (2000-06-01), Albers et al.
patent: 6097797 (2000-08-01), Oseto
patent: 6097798 (2000-08-01), Albers et al.
patent: 6144723 (2000-11-01), Truchon et al.
patent: 6370241 (2002-04-01), Clark
patent: 6381306 (2002-04-01), Lawson et al.
patent: 6393289 (2002-05-01), Bunting et al.
patent: 6549613 (2003-04-01), Dikmen
patent: 6601031 (2003-07-01), O'Brien
patent: 6845152 (2005-01-01), Taff et al.
patent: 2003/0161446 (2003-08-01), Dammrose
Schwartz, “Wireless World: FBI phone tapping and locating cell phones making 911 calls: Is it privacy or paranoia?”InfoWorld, vol. 23, Issue 2, p. 52, Jan. 15, 2001.
Robinson, “Can't Take it with You,”Boardwatch Magazine, vol. 15, Issue 3, p. 102, Mar. 2001.
“Pacific Telesis Says Number Portability is ‘Overrated’,”Communications Daily, vol. 15, No. 178, pp. 1-2, Sep. 14, 1995.
“TR-45, J-STD-025, Rev. A, Lawfully Authorized Electronic Surveillance,” Telecommunications Industry Association, pp. i-192, May 31, 2000.
“IPCablecom Electronic Surveillance Standard,” Society of Cable Telecommunications Engineers, Engineering Committee, Data Standards Subcommittee, SCTE 24-13 2001, pp. ii-37, May 22, 2001.
Elahee S.
Klarquist & Sparkman, LLP
Tsang Fan
LandOfFree
Call path reduction via correlation of call legs in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Call path reduction via correlation of call legs in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Call path reduction via correlation of call legs in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3545673