[Asterisk-Users] RE: Cisco 7905 can't register

[Mike Newton]

>My Cisco 7905 can't register with Asterisk (1.0.7-BRIstuffed-0.2.0-RC7k 
>on Debian stable).  It could, however, register with another 
>installation of Asterisk and the settings on the phone (apart from the 
>SIP proxy address) haven't changed since then.
>
>...
>
>Can anyone offer any advice?
>
>TIA
>
>-- 
>JEREMY MALCOLM <Jeremy at Malcolm.id.au> - lawyer, IT consultant and actor.
>Internet and Open Source specialist. Web site: http://www.malcolm.id.au.
>host -t NAPTR 1.0.8.0.3.1.2.9.8.1.6.e164.org |awk '{print substr($7,6)}'


I was having this very problem last week; perhaps you've got the same issue.
You should make sure if you're behind NAT that your SIPDefault.cnf has the 2
NAT settings enabled.  I didn't figure it out right away, because I was
focusing on the 401 unauthorized message, which doesn't really indicate a
NAT problem.  I can't remember what the 2 settings are offhand, but they're
in the documentation.

Michael Newton