asterisk users - Jul 2004 - Intermittent SIP 404 Not Found response?

I have several SIP devices (Sipuras) that are working fine with *, except
for one annoying little problem.  Occassionally, after being registered
for some period of time, the Sipura returns a 404 Not Found to (I assume)
an INVITE request.  Of course, this makes the extension appear busy.
When this happens, I check the Sipura and it is thinks it is still
registered and I check * and it shows registered.  If I reboot the Sipura
or restart *, the problem clears.  It also clears by itself eventually.

Has anyone seen this behaviour and/or know how to cure it?

TIA

Bruce Komito
High Sierra Networks, Inc.
www.servers-r-us.com
(775) 236-5815

On 09/07/2004, at 8:00 AM, Bruce Komito wrote:
> I have several SIP devices (Sipuras) that are working fine with *, 
> except
> for one annoying little problem.  Occassionally, after being registered
> for some period of time, the Sipura returns a 404 Not Found to (I 
> assume)
> an INVITE request.  Of course, this makes the extension appear busy.
> When this happens, I check the Sipura and it is thinks it is still
> registered and I check * and it shows registered.  If I reboot the 
> Sipura
> or restart *, the problem clears.  It also clears by itself eventually.
>
> Has anyone seen this behaviour and/or know how to cure it?
I believe I'm experiencing the same problem with Grandstream phones, 
although I haven't had time to track it down yet.

Andrew