Connecting FreePBX Systems Together

Curtis

Curtis

Also, we will save a bit of money not having to pay sip providers on both ends (for internal calls)

Curtis

Latency between the sites is about 30ms

DustinB3403

That or @JaredBusch will FFS me and show you how to do it.

scottalanmiller

@romo has done this a bit recently.

scottalanmiller

An IAX2 trunk is what you want between the systems.

DustinB3403

Here is a more up to date document on this.

JaredBusch

Here is a more up to date document on this.

That is current. IAX2 has not changed in years.

That is also what he linked in the first post.

JaredBusch

A site to site VPN already exists between the sites.

There is no point in a VPN for this, but it should not hurt anything as it already exists.

JaredBusch

This is a very minimal connection secured by IP restrictions in the firewall.
My PBX side:

Obviously you need it on both sides. Here is the other side of that connection.
Client PBX side

General Tab.

Nothing on the Manipulation rules.

JaredBusch

Then you need an outbound route to pick up the dialed digits.

The client extensions are 5000-5499. This Dial pattern matches that.

Then make a reverse pattern on the other side.
Our extensions are 100-199

JaredBusch

@Curtis here you go. I made a post with details.
https://mangolassi.it/topic/18700/how-to-set-up-an-iax2-trunk-in-freepbx
Someone add the IAX2 tag to this post.

Curtis