I'm migrating an application running on a fairly old 1.4 (or 1.2?) version of Asterisk to some boxes running 1.6.0.27 The application takes an inbound INVITE like: mumble-fratz-sip%3Afoo%40bar.com at asteriskbox.abc.com:5062 The older version of asterisk replies with a 200 OK and a Contact: header that looks like: Contact: <sip:mumble-fratz-sip%3Afoo%40bar.com at asteriskbox.abc.com:5062> Newer 1.6 Asterisk (I've tried 1.6.0.9 and 1.6.0.27) take the identical call and reply with a 200 OK and a Contact header of: Contact: <sip:mumble-fratz-sip:foo at bar.com@asteriskbox.abc.com:5062> And the calling applications appear to not recognize this 200 OK and never send an ACK and Asterisk eventually throws in the towel on the call setup Is there a knob I can adjust this behavior? The original To: is never molested in the same way, just the Contact header. Thanks in advance, Tom