[OpenSER-Users] Openser for voip+presence+IM

[Alejandro Cabrera Obed]

Dear all, I'm using Debian Etch + Asterisk 1.2.13 as our VoIP server.  I
have several clients talking to each other but now I need to implement
presence+instant messaging also. People told me that Asterisk does not
support presence+IM, so I have to use another SIP server like OpenSER.

I've never used OpenSER so I need to know the following:

Is Openser enough to get just several X-Lite (softphones) clients using
voip+presence+IM, without connecting to the PSTN ??? Or do I need the
integration with Asterisk to get what I need ???

Really thanks


Alejandro