Does anybody have a recommendation for an external VoIP gateway (T1 interface for TDM) that complies to the IAX2 protocol?
Here is what I am trying to do: I want to have an Asterisk server located in one part of the country (US) but the PSTN access point (via a PBX) is located in a different part of the country. I can get a T1 card in the PBX. Each location has high speed internet access. The application on Asterisk is a call processing/IVR.
Both locations have NAT firewalls - e.g., 192.168.y.xxx addresses.
Incoming calls to the PBX can route to the external gateway (located 5’ from the PBX) then on to the IP network. Outgoing calls, the reverse.
I guess I could get a Mediant 1000/2000 (Audio Codes) and open up specific ports on the firewalls to accommodate SIP. However, the IT guys are not happy with that plan. So, couldn’t I use IAX2, which is firewall friendly?
There is also the option of putting in an IAX2 card into a computer. However, the simpler, the better in this case. It would be much better if I shipped a small plug-n-play device that requires little to no maintenance.
Thank you in advance