Hello list, I have a scenario with mobile user - Opensips - Asterisk and I was having some trouble with Options requests sent from Asterisk to mobile user. Due to a high value of the qualify timeout on Asterisk a and low value of the fr_timeout from tm module, Options requests sent to unreachable users were being answered with a 408 by Opensips and so Asterisk was considering the user reachable when in fact they weren't. After some debug I discovered that the low fr_timeout was inducing a fast 408 reply back to Asterisk, and since its qualify mechanism accepts *any* reply as valid, then the user remained reachable until the registration expired. Problem was solved but during my research I found the RFC4320 ( http://www.ietf.org/rfc/rfc4320.txt) that deals with this situation. According to it, I think that Opensips should not send this 408 for non-invites. Not sure if Opensips should implement anything related but I thought it was worth the advice!
Regards, Patrick
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