At 03:58 PM 11/11/2004, Klaus G. Umschaden wrote: >Hello ! > >Does anybody know about SER in B2BUA mode ? SER is a proxy. SER is NOT a B2BUA. >Does anybody know about SER and the SIP preconditions extension (IETF RFC >3312) ? Preconditions are an end=device feature handled transparently by proxy servers. -jiri