[asterisk-users] Choose IAX or SIP trunking?

[Alan Lord (News)]

On 01/10/09 00:57, Kirill 'Big K' Katsnelson wrote:
> Asterisk 1.6 behind a firewall and NAT. We are terminating multiple DID
> calls, originating and transferring.
>
> A provider offers both SIP and IAX trunking. Cateris paribus, what is
> the preferred solution to choose? What points to consider?

We use IAX trunks from our provider primarily as they are so much easier 
to configure and you only need one port open on your firewall/nat gateway.

SIP needs hundreds, if not thousands of open ports IIUC.

HTH

Al