How to set up Linksys SPA8000 between offices?

Question

Linksys

Greetings, comrades!
Perhaps someone has already been given a similar quest, and perhaps this someone can help me.
The task is as follows : "It is necessary to link two Cisco Linksys SPA8000s together so that you can call between branches without using intercity."
Now all communication with branches goes through intercity - these are costs, etc. etc. And the idea was proposed to connect branches with the help of these devices and call using them.
Each office has a Cisco 1921 + Cisco Linksys SPA8000 + PBX. To achieve the goal, DMVPN was raised on the ciscos, OSPF was configured, and as a result, both Linksys see each other inside the local network with all the consequences. But how to tie them together is the question. I played with Dial plan, but since this unit is completely zero, nothing sensible came out, respectively. There is very little information on this quest on the internet.
The question is, how can these units communicate with each other when they call, for example, one of the branch numbers? On the PBX, let's say you can set up redirection, but how to make friends with linksys - I'll never know. Any help is welcome.

Answer 1

The problem was solved by adding the same line to the Dial plan for each line, indicating each number and port of the other device in the format: (501<:@192.168.0.6:5060>|502<:@192.168.0.6:5061>|503<:@192.168 .0.6:5160>|etc.)

Answer 2

In the dialplan, write that if, for example, the number consists of 3 digits and starts with such and such, then send a call to the IP of the desired piece of iron. I worked with them for a long time, but it was quite simple there.
Here is the syntax of the dialplan igorg.ru/2008/04/03/linksys_dialplan
logs, etc.), from the minuses of hemorrhoids that you can earn with it by setting it up for the first time.

Answer 3

Yes, you need to dig a SPA dialplan, it is important to ensure the uniqueness of internal numbers within the entire dialplan.