I don't have the link right now, but a while ago iñaki baz developed a munin plugin which might be usefull for you.

2009/9/11, Chandrakant Solanki solanki.chandrakant@gmail.com:

Hello

I want to know that .... Is there any monitoring tool for kamailio .. which shows user details numbers of user connected @ that time... which automatically updated every 2/5 minutes...

I knew about siremis... is there any other tools..???

-- Regards,

Chandrakant Solanki