Message conversion server and IP telephone

Details Message conversion server and IP telephone Message conversion server and IP telephone

2003-07-17

2008-07-01

Ngo, Ricky Q. (Department: 2616)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S356000, C379S142020

Reexamination Certificate

active

07394804

ABSTRACT:
Session Initiation Protocol (SIP), a protocol used in VoIP (Voice over IP) communications, enables a caller to send a SIP message to a callee with his/her UserID concealed from the callee, which in turn, prevents A SIP server from making an attempt to manage the caller. If the same IP Telephone address is used whenever the IP call is made, a third party may guess the IP address easily during conversation. The SIP message sent by the caller is converted and conversion tables are managed by the SIP server. The IP Telephone modifies its IP address for each IP call. Thus, the caller can make a call to the callee with his/her UserID concealed from the callee using the SIP server with a message conversion function and communications carriers having SIP servers installed to manage the callers using their conversion tables. It is difficult to any malicious third party to guess the IP Telephone address, because the IP Telephone address is modified for each call.

REFERENCES:
patent: 6160876 (2000-12-01), Moss et al.
patent: 6959009 (2005-10-01), Asokan et al.
patent: 2004/0001509 (2004-01-01), Zhang et al.
patent: 2007/0094412 (2007-04-01), Sollee
patent: 2003009231 (2003-01-01), None
patent: 2003-009231 (2003-10-01), None
T. Narten, “Privacy Extensions for Stateless Address Autoconfiguration in IPv6” Network Working Group Request for Comments: IBM/Microsoft Research, Jan. 2001, pp. 1-13.
J. Peterson, A Privacy Mechanism for the Session Initiation Protocol (SIP), Network Working Group, Request for Comments: 3323, Nov. 2002, pp. 1-20.
RFC 3261 SIP: Session Initiation Protocol, Jun. 2002, Rosenberg, et al., Standards Track, pp. 213-220.
Rfc2327, SDP: Session Description Protocol, Apr. 1998, Handley & Jacobson, Standards Track, pp. 1-43.
RFC 1889, RTP: A Transport Protocol for Real-Time Application, Jan. 1996, Schulzrinne et al., Standard Track, pp. 1-5.
Narten, T. et al., “Privacy Extensions for Stateless Address Autoconfiguration in IPv6”, Network Working Group, Jan. 2001.

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