[asterisk-users] SIP 415 messagse

[Mr. Jones]

Hi Folks,

I'm getting a lot of these messagse now with the Grandstream phones and Asterisk

Incoming call: Got SIP response 415 "Unacceptable Content-Type" back
from 192.168.1.X

I don't think I noticed them when I only had one or two phones hooked
up for testing, but I suppose I could have just missed them andthat
the frequency isn't very high. Now with 30 devices they are very
frequent.

Any ideas?