[Serusers] Please help me identify

Hi First happy holidays to all, I have setup SER Proxy and working fine as long as I used the URI of type User at mydomain.com. Now I want to assign each user an ID of 7471234 which they have to prefix with * (e.g *7471234) to call other user. Lets say UserA with with number 7471234 wants to dial UserB with Tel # 7472222 dials *7472222 and gets connected as long as the UserB is registered with my SER Proxy. If not 404 msg is sent UserA. if UserA dial a PSTN numbe either using + & CounryCode & Number, or 00 & CounryCode & Number, & or 011 & CounryCode & Number, they get forwarded to my Asterisk Server. Please help me identify what should I use the Aliases Table or Subscriber Table or DNS NAPTR to map uri to Number (eg 7471234 maps to UserA at mydomain.com . Thanks in Advance, Merry Xmas and Happy New Year! Abid Mirza -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.296 / Virus Database: 265.6.5 - Release Date: 26/12/04