[Serusers] Q - SER capability ?

[Serge Leschinsky]

Dear Sirs.

 I would like to find a response (to begining only “yes” or “no”)
about the possibility to solve a problem by the means of SER
      My task is:
There is one extern "line" (SIP connection), given by VoIP provider (with
determined login/password). 
      We need to create a group of users (we could name them
“local users”), for they could register themselves on our server (they
need authorization and accounting) and communicate with each other.
      If there is a need to go out to extern numbers, the
connection should be through extern line by putting registration data,
given by provider.

There is almost all that is necessary. It would be good to put up a
IVR, but it only desirable, but not necessary. 

Thank you in advance  

-- 
Best regards,
 Serge                          mailto:serge at artlife.tomsknet.ru