Patent ID: 7860800
Filing Date: 2010-12-28
Classification: G06Q,H04L,H04M

Abstract:
1. A method comprising: receiving, by a first session initiation protocol (SIP) server and from a first party, a first SIP message related to initiating a call transfer from a second party to a third party; performing a lookup, in a call policy information database associated with the first SIP server, first party call policy information associated with the first party; authorizing, by the first SIP server, the call transfer based on the first party call policy information; creating, by the first SIP server and based on the authorizing, a digital signature identifying the first SIP server; generating, by the first SIP server and using account information for the first party, billing information related to the call transfer; appending, by the first SIP server, the billing information and the digital signature to the first SIP message; verifying, by a second server, the first SIP server based on the appended digital signature; completing, by the second SIP server, the call transfer based on the verification of the first SIP server; and determining, by the second SIP server and based on the appended billing information, whether to bill the first party for the call transfer.