hello all, please help a poor newbie: i installed SER as a SIP proxy in front of asterisk and it works great....followed the instructions in SER howto to the letter, except i didn't install SRV records (only one server for now) and i added a handoff to asterisk (asterisk is running on port 5070 on the same machine) as a PSTN gateway. everything works fine with x-lite, but the grandstream gets 401 errors and won't register. Both the x-lite and the grandstream are on the same NAT with no STUN so that is not the problem. The config: username and authorization user are the same domain/realm: phone.myserver.com proxy server: phone.myserver.com outbound proxy: (IP address of server) this is driving me crazy...if anyone could point me in the right direction i would appreciate it. sorry if i'm not asking the correct questions, i don't know what configuration on the x-lite corresponds to what on the grandstream. thanks, yair p.s. if there is a SER or asterisk or VoIP usergroup in Israel, i would like to join one, and if not, if there are israeli users on the list please contact me to start one, to help each other out..