[Asterisk-Users] Multi Office Configuration

[Nathan Alberti]

We currently have an office which has a happily working Asterisk setup 
and all is good. We are looking to deploy the same solution to our other 
5 offices, my question relates to the interconnections between all those 
sites. The requirement is seamless dialing of extensions and the ability 
to have members of multiple offices participate in call queues. I wish 
to keep the configuration as simple and easy to troubleshoot as possible.

The options I see are as follows:

1) IAX trunks between all offices in a full mesh configuration
    - This is probably the most workable and easy to set up but quite a 
bit of config and not a "dynamic" as I'd like it.

2) DUNDi
    - Concerns about its maturity and I found it hard to trouble shoot, 
there was not allot of documentation available. I got it working 
successfully but I'm not 100% sure its the way to go.

3) Configure internal DNS servers for ENUM and have asterisk use this 
for call routing.
    - Don't know enough about it yet to test but from what I have read 
it might be a possibility.

4) "Switch" configuration on all stub servers back to the central 
Asterisk box.


Does anyone have any examples of how they have configured Asterisk in a 
similar situation or better ideas that the ones above ?