Hello 2011/9/5 Stas Bakulin <stasbakulin(a)gmail.com>om>: * Create RTP proxying session on each INVITE rtpproxy_offer(); * On every positive reply extract modify answer: rtpproxy_answer(); * On every BYE / CANCEL / failure reply tear down session (if any): unforce_rtp_proxy(); That's almost all. You should consider providing modifiers to rtpproxy_offer(), catch reinvites, be careful of refers and be aware of some other obscure magic - but the above text will works in most cases. -- With best regards, Peter Lemenkov.