[cisco-voip] ata 186 using SIP

[Edgar Almonte]

Greg,

Thanks for the info. You confirmed what I was suspecting. I could get my 
ata to work behind a nat using sip but not with h323. I know with h323 i 
could have the ata register on the cisco gateway and then incoming calls 
to the ata could be handled easily by the gateway but because of nat I 
cant do it. With SiP I cant register the ata on the gateway so I need a 
3rd box (sip server) which i was trying to avoid. Hopefully cisco will 
add something to the IOS to support a basic sip registration.

Thanks again,
Edg

Gregory D. Burns wrote:

> Edgar,
>
> If I'm up-to-date on my information, I do not think that Cisco 
> Gateways can do what your asking alone. You would need a Sip Proxy 
> Server, There is a good Linux Base one called "SER" 
> http://www.iptel.org/ser/ . Along with a SIP Proxy, you will need to 
> setup port forwarding on your router to froward incoming calls to your 
> NATed ATA. This is the setup that I have at home so that I know it works.
>
> [ATA186]<--NAT-->[Router]<--PUBLIC DYNAMIC  IP-->[SER SERVER] 
> <-->[AS5350]<-->{ PSTN}
>
> -Greg
>
> Edgar Almonte wrote:
>
>> Hello,
>>
>> Does anyone know how I can configure a ata186 behind a NAT router to 
>> make and receive calls thru a cisco gateway with a public IP address. 
>> I was able to make outgoing calls thru the ata 186 but I have a PRI 
>> on the gateway and  I would like to assign one of the DID numbers on 
>> the PRI to the Ata186. The ATA is behind a NAT router and the NAT 
>> router has a dynamic public IP on the internet side. I need a way for 
>> the ata to register on the cisco and sennd some kind of keepalive to 
>> indicate when its IP has changed.
>>
>> Thanks in advance!
>> Edgar
>>
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>>
>>
>
>