2010/3/16 Alex Balashov abalashov@evaristesys.com:
What kind of timestamp? What are you talking about?
http://tools.ietf.org/html/rfc3261#section-20.38
-------------------------------------------------------- RFC 3261 - 20.38 Timestamp
The Timestamp header field describes when the UAC sent the request to the UAS.
See Section 8.2.6 for details on how to generate a response to a request that contains the header field. Although there is no normative behavior defined here that makes use of the header, it allows for extensions or SIP applications to obtain RTT estimates.
Example:
Timestamp: 54 --------------------------------------------------------
Kamailio does not support such header (it just ignores it).