I have 2 Polycom SP 500's attached to my system. Both are behind NATs, but both seem to work fine, for the most part. A few weeks ago, I started to notice that I get an error message from one of them: Feb 20 08:54:58 NOTICE[10663]: chan_sip.c:7691 handle_request: Registration from '<sip:Polycom1@xxx.yyy.93.254>' failed for 'zzz.aaa.103.75' However, trying to call the phone works fine, so I know it's registered. Turning on SIP debug for the phone shows that it attempts to register and is rejected with "unauthorized", then another attempt is rejected with "forbidden", and finally a registration succeeds. The other phone doesn't exhibit this behavior. I am running asterisk 1.0.7. Has anyone used Polycoms remotely from behind a NAT enough to have insight as to what is going on? Thanks! -- -M There are 10 kinds of people in this world: Those who can count in binary and those who cannot.