asterisk users - May 2009 - Logging into queue homed off remote system

Greetings all, I have an interesting problem I am trying to work around.

I currently have 2 * servers running in separate offices, using IAX2 to trunk
between them, and  queues in our main office.  I'll call them Office_A and
Office_B. I use Polycom 501s with a primary and secondary server, the primary
being whichever server is local to them. What I'm finding is that when a
user logs into the queue on Office_A, if their primary server is set to
Office_B, the IAX trunk ends up getting logged into the queue, which is no good.
I tried using a SIP trunk to make the connection, but I either end up with a
digest user mismatch or a Forbidden Auth.  After playing around with
insecure=port,invite and fromuser=<user> I was able to log into the queue
being homed off Office_B, but the agent logged into the queue was the SIP trunk.
Below is the relevant parts of sip.conf, any suggestions are welcome.

Office_A sip.conf

[general]
Register => office_a:secret at 10.10.40.118/office_b

[office_b]
fromuser=office_a
username=office_a
type=peer
secret=secret
context=incoming
host=dynamic
insecure=port,invite


Office_B sip.conf

[general]
Register => office_b:secret at 10.10.40.118/office_a

[office_a]
fromuser=office_b
username=office_b
type=peer
secret=secret
context=incoming
host=dynamic
insecure=port,invite



Thanks,

Bryan

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