Hi! I'm developing a Java SIP phone with the pjsua library. The phone is registered to an asterisk server which has a T1 connection to POTS. Whenever I call my softphone from my mobile, I don't hear a ringback on the mobile. In order to rule out asterisk as the fault, I registered the zoiper softphone to it and suddenly the ringback is there. Can someone please explain what I have to do to tell asterisk to play a ring back to the POTS phone? The pjsua-app doesn't have the ringback feature either BTW. Cheers, Florian -- DI Florian Hackenberger florian at hackenberger.at www.hackenberger.at