Am 13.12.2010 13:32, schrieb Thomas Martin: > Hello Benny, > > thank you very much for the insight! > > Does PJSIP provide some sort of probing mechanism (on the pjsua_level) to learn about the contact_rewrite_method supported by the particular server? > If we are dealing with a countable number of well-known server manufacturers, one could install a small dictionary to look-up the manufactor-specific method on the application-level (or maybe even on the pjsua_level). - I suppose, one could also implement some kind of "heuristic" trial-error mechanism by e.g. 1) registering an account with PJSUA_CONTACT_REWRITE_METHOD, 2) automatically issuing a call to that account and interpret the server's reaction ...? (From my perspective it seems that such a facility would fit neatly on the "pjsua_" abstraction level... ;-) ?) > > What is the recommended tactic to deal with this situation? Do not update the contact at all. Every SIP provider I know supports NAT traversal for their clients (at least with UDP). regards Klaus
