Greetings all,

 

I have been configuring a FreeSWITCH / FusionPBX system to do TLS and SRTP.

 

When I configure it to do srtp in the outbound route, the SDP produced looks like:

 

o=FreeSWITCH 1352745516 1352745517 IN IP4 10.16.0.131

s=FreeSWITCH

c=IN IP4 10.16.0.131

t=0 0

m=audio 22222 RTP/SAVP 9 0 8 3 101 13

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-16

a=crypto:1 AES_CM_128_HMAC_SHA1_32 inline:djfKObSYrk0J8pVI1w/OfQBjTYwNgTi80C68VgBB

a=ptime:20

m=audio 22222 RTP/AVP 9 0 8 3 101 13

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-16

a=ptime:20

 

This is great if I want to support both SRTP and non-SRTP calls; but I cannot figure out how to remove the AVP block so that SRTP is mandatory.

 

How do I require SRTP?

 

Thanks,

 

Clint


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