Trunking between two asterisk servers

[davidsinaus]

Greetings all. I'm rather new to VoIP and *, but have been doing a fair amount of research. I've successfully set up systems both at my home and my corporate office and they work very well. What I can't seem to figure out is how to link them to each other. The problem is twofold:

o I have a dynamic IP at home, although it is registered with DynDNS. My network is NATed through my router.
o I can't make a backwards path from home to work (i.e. forwarded ports on the corporate external IP to my * server) as I don't have access to that equipment.

Is it possible to connect these two servers such that I can both send and receive calls? I've been looking at IAX2 trunks, but everything I've read suggests that they are one-way. Is it possible to have the office system maintain a two-way connection with my home server using IAX2?

TIA for your help!

[rd_cortes]

First... if you cannot forward ports in your workplace, how do you receive internet calls there? If you can't (i.e the ports are closed entirely), then this can only work one way (you could probably just use your home box from your work, unless there's some registration SIP Proxy somewhere in the mix).

Anyway, back to the answer, here are some excellent pointers:
http://www.voip-info.org/wiki-DUNDi (Instructions for either SIP or IAX trunks using DUNDi).

Trixbox based IAX2 Trunking for just what you want to do, although you could do it with a non trixbox but freepbx based asterisk installation:
http://www.trixbox.org/forums/trixbo...es-iax2-trunks

Vanilla Asterisk (a self installed Asterisk) instructions for IAX2 Trunking straight from the Digium's AsteriskNow Forums:
http://forums.digium.com/viewtopic.p...3e17574d30507e

I have DUNDi via IAX2 configured at some clients, and it was easy to set up, and works every time, very configurable too!

Good Luck!