[asterisk-users] Asterisk 1.6 + Cisco AS5300

[Mickael Monsieur]

Hello,
I have a Cisco AS5300 connected to Asterisk (1.6.2.9)
Between 15-16 minutes, the call is disconnected without reason.
Here is what is displayed in the debug:

Received an SDES from 10.4.0.10:17399
     -- Got SIP response 420 "Bad Extension" back from 10.4.0.10
     -- Stopped music on hold on SIP/as5300-1-0000004d
   == Spawn extension (dialin, 065939191, 2) exited non-zero on 
'SIP/as5300-1-0000004d'



Do you have an explanation?


Best regards,
Mickael