Title: Cisco System's Statement about IPR claimed draft-rosenberg-dispatch-vipr-sip-antispam-00 Date: 11 November 2009 Cisco is the owner of US Published Patent Application 20090022149 and US Patent Applications Serial Nos. 12370384, 12495615, 12608545, 12608484, and 12495639 relating to the subject matter of "Session Initiation Protocol (SIP) Extensions for Blocking VoIP Spam Using PSTN Validation" <draft-rosenberg-dispatch-vipr-sip-antispam-00>. If technology in this document is included in a standard adopted by IETF and any claims of any Cisco patents are necessary for practicing the standard, any party will have the right to use any such patent claims under reasonable, non- discriminatory terms, with reciprocity, to implement and fully comply with the standard. The reasonable non-discriminatory terms are: If this standard is adopted, Cisco will not assert any patents owned or controlled by Cisco against any party for making, using, selling, importing or offering for sale a product that implements the standard, provided, however that Cisco retains the right to assert its patents (including the right to claim past royalties) against any party that asserts a patent it owns or controls (either directly or indirectly) against Cisco or any of Cisco's affiliates or successors in title or against any products of Cisco or any products of any of Cisco's affiliates either alone or in combination with other products; and Cisco retains the right to assert its patents against any product or portion thereof that is not necessary for compliance with the standard. Royalty-bearing licenses will be available to anyone who prefers that option. For information contact: Dan Lang Director, Intellectual Property Cisco Systems +1 408-526-6672 standards-ipr@cisco.com

Title: Cisco System's Statement about IPR claimed draft-rosenberg-dispatch-vipr-sip-antispam-00 Date: 11 November 2009 Cisco is the owner of US Published Patent Application 20090022149 and US Patent Applications Serial Nos. 12370384, 12495615, 12608545, 12608484, and 12495639 relating to the subject matter of "Session Initiation Protocol (SIP) Extensions for Blocking VoIP Spam Using PSTN Validation" <draft-rosenberg-dispatch-vipr-sip-antispam-00>. If technology in this document is included in a standard adopted by IETF and any claims of any Cisco patents are necessary for practicing the standard, any party will have the right to use any such patent claims under reasonable, non- discriminatory terms, with reciprocity, to implement and fully comply with the standard. The reasonable non-discriminatory terms are: If this standard is adopted, Cisco will not assert any patents owned or controlled by Cisco against any party for making, using, selling, importing or offering for sale a product that implements the standard, provided, however that Cisco retains the right to assert its patents (including the right to claim past royalties) against any party that asserts a patent it owns or controls (either directly or indirectly) against Cisco or any of Cisco's affiliates or successors in title or against any products of Cisco or any products of any of Cisco's affiliates either alone or in combination with other products; and Cisco retains the right to assert its patents against any product or portion thereof that is not necessary for compliance with the standard. Royalty-bearing licenses will be available to anyone who prefers that option. For information contact: Dan Lang Director, Intellectual Property Cisco Systems +1 408-526-6672 [email protected]