[cisco-voip] Srtp Key Management Over Voip?

[Ramiz Sardar]

Friends,
I am using srtp in voip setup from router to router for voice security. If i
just enter command "srtp" in voice service voip mode, srtp start
encrypting/decrypting voice packets that i can see using debug command. But
my question is how i can define shared key, encryption technique like i can
do it in ipsec???
I tried to find it on cisco website but couldn't. Even i posted my question
on cisco Netpro/Sadikhov etc but same no response. My voip setup consist of
MD110 pbx with cisco 3800 routers. Topology you can see below:

Phone---------PBX------------------------Router---------------------------------------Router-------------------PBX----------Phone

Between PBX and Router = E1 PRI (QSig)
Between Router to Router = E1 Link
Session Protocol Between Routers = H.323

Note: IPsec can also be used for voice security but problem is, i cannot use
CRTP with IPSec but can use with SRTP.

Your immediate response will be highly appreciated.

Best Regards
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