Title: Cisco System's Statement about IPR claimed in draft-rosenberg-dispatch-vipr-pvp-00
Date: 11 November 2009

Cisco is the owner of US Published Patent Application 
20090022149 and US Patent Applications Serial Nos. 
12495615, 12608545, 12608484, 12608597, 12495639, and 
61222036 relating to the subject matter of "The Public 
Switched Telephone Network (PSTN) Validation Protocol 
(PVP)" <draft-rosenberg-dispatch-vipr-pvp-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