[Serusers] Effect of use_domain in registrar module

Hi, all Currently we are running Openser 1.1 registering ATAs just with user name only. This works fine however it generates minor problem with our Python based monitoring script. The script was written under assumption of non blank domain list. resulting only showing those sessions where the user location table has domain field manually inserted. Before we switch to use_domain parameter to 1, We'd like to know any implicit effect of doing it, as well as some questions answered. Q. 1) Does this setting takes "SIP_DOMAIN" env parameter of server itself or the client ATA must send it to Openser in "REGISTER"? Q. 2) Once use_domain in registrar is set to 1, would there be any impacts on existing ATA entries in location table with blank domain? Q. 3) Are there any other parameter that are required to be changed along with use_domain in registrar module? Any comments will be appreciated. John Chahn Kim email: johnk(a)koreanet.us