[Serusers] How to set timer in Ser.cfg for sems

Dear all, I want to know that How can I set the timers in ser.cfg for different call signalling..I mean to say that suppose a Sip client A is making a call to Sip client B, and if SIP client B is not sending the 180 response then this call should get fail in 15 second and I can route the message to SEMS... As of my best knowledge there is fr_timer [ex.- modparam("tm", "fr_timer", 30 )]. but it works for final response ACK..I mean to say in this case if the caller A will not recieve the final ACK from B within 30 seconds then call get failed and I can route the call to SEMS. But I need to implemet two case 1) When the caller is not getting the 180 Respone from Calle (may be calle was registered a moment before and due to network failure is not able to send 180 respone) then call should get fail within 15 second. and be able route to SEMS. 2) When the caller is not getting the final ACK from calle then then call should get fail within 30 second. and be able route to SEMS. (This case I am able to handle using fr_timer, But I am not able to handle case no 1, please help me .... thanks koyama --------------------------------- Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage!