[asterisk-users] Forwarding XXXX to XXXX prevented.

[Ernie Dunbar]

I have a Linksys 2102 ATA here that does call forwarding internally with
the *72 code, however our Asterisk 1.6.2.17 server doesn't forward the
call properly. This is what shows up in the console when an incoming call
is made while the ATA is call-forwarded:

    -- Called Username
    -- Got SIP response 302 "Moved Temporarily" back from XX.XXX.XX.XXX
    -- Now forwarding DAHDI/1-1 to 'Local/12505551234 at vancouver' (thanks
to SIP/Username-00000045)
    -- Forwarding DAHDI/1-1 to 'Local/12505551234 at vancouver' prevented.
  == Everyone is busy/congested at this time (1:1/0/0)

The SIP configuration allows call forwarding (cancallforward=yes), so I'm
at a loss as to what is preventing the forwarding. It's not like Asterisk
is very specific about that.