The following update was received February 25, 2002 From: "Frost, Thomas F (Tom), ALCOO" This declaration is being made pursuant to the provisions of IETF IPR Policy, Sections 10.3.1 and 10.3.2. This is to advise the IETF that AT&T believes it owns intellectual property including various pending patent applications and United States Patent No. 6,324,279, that may relate to the following Internet Draft documents: draft-ietf-sip-100rel-xx draft-ietf-sip-call-auth-xx draft-ietf-sip-events-xx draft-ietf-sip-manyfolks-resource-xx draft-ietf-sip-privacy-xx draft-ietf-sip-state-xx draft-ietf-sip-update-xx draft-dcsgroup-sip-arch-xx draft-dcsgroup-sip-proxy-proxy-xx draft-willis-sip-cookies-xx To the extent that the technology discussed in any of these Internet Drafts becomes an IETF Standard, and to the extent claims of AT&T's patents are required to implement the IETF Standard, AT&T agrees that, upon written request, AT&T will offer, on a nondiscriminatory basis, non-exclusive licenses on fair and reasonable terms under such patent claims to implement that IETF Standard. AT&T's willingness to grant such licenses is conditioned upon the prospective licensee granting a reciprocal license to AT&T under any patents that the prospective licensee has to any technology required to implement that IETF Standard. Written requests for licenses may be sent to: AT&T Intellectual Property Licensing Intellectual Property Vice President 180 Park Avenue Florham Park, NJ 07932 ======= The following update was received February 7, 2002 From: "Frost, Thomas F (Tom), ALCOO" This declaration is being made pursuant to the provisions of IETF IPR Policy, Sections 10.3.1 and 10.3.2. It is an update to the IPR declaration of February 1, 2002, regarding "draft-ietf-sip-rfc2543bis-06". This is to advise the IETF that AT&T believes it owns intellectual property that may relate to Internet Draft document " draft-ietf-sip-rfc2543bis-07", including United States Patent No. 6,324,279. To the extent that the technology discussed in this Internet Draft becomes an IETF Standard, and to the extent claims of AT&T's patents are required to implement the IETF Standard, AT&T agrees that, upon written request, AT&T will offer, on nondiscriminatory basis, non-exclusive licenses on fair and reasonable terms under such patent claims to implement that IETF Standard. AT&T's willingness to grant such licenses is conditioned upon the prospective licensee granting a reciprocal license to AT&T under any patents that the prospective licensee has to any technology required to implement that IETF Standard. Written requests for licenses may be sent to: AT&T Intellectual Property Licensing Intellectual Property Vice President 180 Park Avenue Florham Park, NJ 07932 The following was received October 11, 2001 From: "Frost, Thomas F (Tom), ALCOO" This declaration is being made pursuant to the provisions of IETF IPR Policy, Sections 10.3.1 and 10.3.2. This is to advise the IETF that AT&T believes it owns intellectual property including various pending patent applications that may relate to the following Internet Draft documents: draft-ietf-sip-privacy-xx draft-ietf-sip-call-auth-xx draft-ietf-sip-manyfolks-resource-xx draft-ietf-sip-state-xx draft-dcsgroup-sip-proxy-proxy-xx draft-dcsgroup-sip-architecture-xx draft-willis-sip-cookies-xx To the extent that the technology discussed in any of these Internet Drafts becomes an IETF Standard, and to the extent claims of AT&T's patents are required to implement the IETF Standard, AT&T agrees that, upon written request, AT&T will offer, on a nondiscriminatory basis, non-exclusive licenses on fair and reasonable terms under such patent claims to implement that IETF Standard. AT&T's willingness to grant such licenses is conditioned upon the prospective licensee granting a reciprocal license to AT&T under any patents that the prospective licensee has to any technology required to implement that IETF Standard. Written requests for licenses may be sent to: AT&T Intellectual Property Licensing Room 2E37, Bldg. 104 180 Park Avenue Florham Park, NJ 07932