[Serusers] Need Help with SER

Hi First happy holidays to all, I have setup SER Proxy and working fine as long as I used the URI of type User(a)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(a)mydomain.com). Thanks in Advance, Merry Xmas and Happy New Year! Abid Mirza ===== Abid A. Mirza Bits & Byte Tech., Inc. 146 West 29 Street , 10 Fl. New York, NY 10001 Tel : +1 (212) 967-1616 Fax : +1 (212) 967-0672 Mob : +1 (917) 582-2290 Email : amirza_nyc(a)yahoo.com