Unfortunately, there is now no standard for use of RADIUS along with SIP. SER users leveraging the combination of these two technologies are left with implementation of expired internet drafts. There are some chances that the IETF community revitalizes the document.
Thus, I would appreciate hearing if any of the active RADIUS/SIP/SER users have had any issues with the RADIUS authentication in SER, which is based on draft-sterman-aaa-sip.
Thanks,
-jiri
-- Jiri Kuthan http://iptel.org/~jiri/