[asterisk-users] Asterisk 1.4: encryption support

[Alejandro Cabrera Obed]

Dear all, I have Asterisk 1.4.13 and I need to use encryption among
Asterisk and my SIP users, and with the RTP data interchanged among
users. I prefer the use of ZRTP/SRTP because we use Twinkle and
X-Lite/Zfone as our voip clients and they support these encryption
mechanism.

My question is: do I have to enable any encryption support in Asterisk
1.4.13 ??? Or Asterisk has native encryption support ???

Thanks a lot

Alejandro