Is there something significantly different in 1.2.x sip.conf that would prevent clients from registering with the server? We installed 1.2.3 and copied over sip.conf from a production 1.0.9 box and clients can not register. Asterisk just replies with "unauthorized". Here is a sample from sip.conf. [2048881234x3] accountcode=318 type=friend context=openit username=2048881234x3 callerid=OpenIT <2048881234> secret=xx canreinvite=no host=dynamic mailbox=2048881234 nat=yes qualify=yes dtmfmode=rfc2833 disallow=all allow=g726 allow=gsm allow=ulaw allow=ilbc allow=g729 Regards, -- John Lange