It seems the SNOM Phones are requesting to have SRTP but I do not have the module res_srtp.
I tried to compile it with Asterisk 1.8, make menuselect, but I found that it can not be used (I am not able to select it) with the following details:
Secure RTP SRTP
Depends on: srtp E
Can use: N/A
Conflicts with: N/A
So, how I can use it?
What I have to do to know the reason for not being able to use it?
From the other side, if I succeeded to compile the res_srtp and having it as supported channel on asterisk 1.8, the question is: it will be supported for SNOM or there will be a conflict?