[Asterisk-Users] Successfully Using $135 Avaya sip phone

[Nicholas Bachmann]

Brian Elton wrote:

>I think I am the first to use the $135 Avaya 4602 SIP phone, but I
>need some support from the community to fix one problem I have with
>it.
>
>The phone stops working after about 20-30mins if I have
>mailbox=context in Asterisk; when I do have mailbox=contect in
>asterisk the sip debug returns "481 extension does not exist."
>
>Anyone willing to help me figure out why?
>  
>

I have two debugging suggestions for you:

1) Upgrade to latest CVS
2) Try using ethereal to look at the SIP packets going back and forth 
before the phone stops working

Nick