[Asterisk-Users] Problem with Cisco 7905 "Not Acceptable Here"

[John Lange]

Asterisk seems to have a problem with the Cisco 7905. If the user is on
the phone with another call, asterisk reports:

    -- Executing Dial("SIP/206.XX.XXX.XXX-08f899d8", "SIP/204XXXXX83|10") in new stack
    -- Called 2044XXXXX83
    -- Got SIP response 488 "Not Acceptable Here" back from 192.168.1.112

And it then rolls as a "NOANSWER" rather than a BUSY.

If you just take the phone off the hook but don't place a call, it then
reports a BUSY as it should.

Is this an Asterisk bug or a Cisco configuration problem?

If it is related to call waiting can this be disabled?

Thanks,
-- 
John Lange