[Asterisk-Users] Cisco ATA186/Asterisk registration - weird behavior

[Miguel Cruz]

On Fri, 23 May 2003, Paul Cheng wrote:
> I have two Cisco ATA186s that are set up to connect to an Asterisk box
> via SIP. One is on the local LAN and not natted, the other is on a
> remote LAN behind a NAT router. Both boxes are running v2.16 firmware.  
> They can both register with the Asterisk box, but after they are idle
> for a while, either they or the Asterisk box "lose" the connection (i.e.
> stop being registered). Strangely enough, though, the Cisco that is on
> the LAN has two analog telephones connected to the ATA: x801 is Phone 1,
> x802 is Phone 2. x802 stays registered as verified with "sip show
> registry", but x801 does not (even though it is the same box!).  
> Outbound calls can be placed from all 3 phones (only 1 phone is
> connected to the remote ATA), but only the extension that stays
> registered can receive inbound calls.

I had exactly the same symptoms. I solved it by configuring the ATA-186s
to register every couple minutes. Probably not the most efficient solution
but it got the job done.

miguel