Hi all, How to register a sip phone with iptel.org how to pass the password while registering with iptel.org Is there any tag for Authentication like FROM / TO..? My register request is as follows.. (using which I'm not able to register) REGISTER sip:iptel.org:5060 SIP/2.0 Via: SIP/2.0/UDP 192.168.14.56:5060;branch=z9hG4bK2952839661;rport From: abcd <sip:abcd@iptel.org>;tag=946143070 To: abcd <sip:abcd@iptel.org> Call-ID: 320799555(a)192.168.14.56 <mailto:320799555@192.168.14.56> CSeq: 1 REGISTER Contact: abcd <sip:abcd@192.168.14.56:5060> max-forwards: 50 user-agent: oSIP-ua/0.8.1 expires: 3600 Content-Length: 0 How to add the iptel's username and password with the register message..? let my username is abcd and password is xyz I tried with CISCO phone (7960) also. Not able to register. I have given proxy ip : iptel.org and port : 5060 What values should be given in outbound proxy and port Enable NAT : yes My phone is working behind firewall & NAT. Whether the nathelper module is enabled by iptel.org by default..? Or I have to take care of the messages with NAT modifications..? I can send and receive messages on the same port. Kindly Help.. With Regards, Santhosh.S