[Asterisk-Users] iax.conf qualify=yes not working?

[Wilson Pickett]

>  In some cases, the IAXy device and/or Asterisk are not communicating their
> qualification, because "iax2 show peers" shows the device as status UNKNOWN.
> However, when a user picks up the telephone plugged into the IAXy, they can
> place a call just fine within our Asterisk server.

Are the IAXy behind firewalls or routers? It sounds like the message
sent by asterisk is not geting through. The IAXy would still know how
to call out, but can they be called? If UNKNOWN, I assume not.