[Asterisk-Users] Sipura 2000 not ringing.

[Senad Jordanovic]

>>> 
>> 
>> I had (and still have) similar problem. Once SPA 2000 registers with
>> * it all works well for few minutes. After that all incoming calls
>> are not answered by SPA 2000. Is that what you mean?
>> 
>> If so, I have temporaraly got SPA 2000 to re-register every 3
>> minutes. This seems to work at the moment.
> Are you sure you configured the SPA to send a keep alive message
> every 15-30 seconds?  Sounds to me like the NAT binding is simply
> closing up and getting reopened with the frequent registrations.  

Yes, you are prabably 100% right and I did tried all combinations
possible in SPA settigns to achieve NAT port opened but with no success.
It should work behind NAT "out of box". Even Grandstream device do!