Patent ID: 8683077

Claim:
A method for conveying information related to a transport addressing scheme, comprising: including, by a user agent (UA) comprising a processor, in a Session Initiation Protocol (SIP) message an indicator that indicates whether the UA is capable or not capable of simultaneously supporting multiple transport addressing schemes for communication during at least one communication session, wherein the indicator further indicates that a first of the multiple transport addressing schemes is used for signaling and that a second of the multiple transport addressing schemes is used for media, wherein the multiple transport addressing schemes are IPv4 and IPv6, wherein the indicator conveys at least one of: at least one transport addressing scheme used by a first user agent (UA) attempting to establish contact with a second UA; a request from the first UA for the second UA to inform the first UA of at least one transport addressing scheme supported by the second UA; and a specification of at least one transport addressing scheme that the first UA prefers that the second UA use.