From: "Rockson Li (zhengyli)" <[EMAIL PROTECTED]>
You need to ignore any Contact header in non target-refresh
request/response.
RFC5057 sec5.4
Target refresh requests update the remote target of a dialog when
they are successfully processed. The currently defined target
refresh requests are INVITE, UPDATE, SUBSCRIBE, NOTIFY, and REFER
FYI
To amplify what Rockson said, see section 12.2 of RFC 3261:
Note that an ACK is NOT a target refresh request.
Dale
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