[Asterisk-Users] snom reporting busy when it shouldn't

[nicolas]

I am using asterisk cvs. 

Incoming/Outgoing calls are working.
Calling the phone when some other lines are in use on the phone is ok.
What does not work though is when the phone is ringing, nobody else can 
call the phone anymore.

That's what * is saying:

    -- Got SIP response 486 "Busy Here" back from 192.168.1.250
    -- SIP/snom1-4a44 is busy

I am using the 2.05e snom200 firmware.

Snom people sad must run.
nico