Thank you Raviprakash for your reply. I have my system setup as you described, however, I am experiencing difficulty with the actual call transfers. The problem is that Asterisk is not "replacing" the call when it receives a REFER request to connect. Are you using this setup? I have configured openser to relay calls made to ruri 700-720 to asterisk running on localhost:5069 Call flow: phoneA --------call------> phoneB PhoneB answers then PhoneB -----transfer --------> asterisk (700) asterisk answers and plays the parking location (701) PhoneB (press transfer again) -----------REFER ---------> phone A PhoneA -----------invite with referred-by header-------> asterisk At this point, Asterisk <---------------connected and plays parking lot 702 -----------> phoneA Asterisk <-------------still connected -------------------> phoneB This was a specific example but this transfer problem is not limited to call park only. It happens any time asterisk is the second party called in call transfer. Thanks in advance for your help. -- Zahid On May 11, 2007, at 12:35 AM, raviprakash sunkara wrote: