One question I get asked a lot is “hey you’ve got all that Sun gear at home, what the hell do you do with it?”
After working on a telco IP PBX solution for a couple of years I’ve just discovered Asterisk.

It’s a Free software implementation of an IP Private Branch Exchange (or IP Centrex) application server. It provides IP telephony call control (soft switching) and all the usual PSTN style features for SIP (and other protocol) clients on hard and soft phones. All of which used to be done by extremely expensive proprietary equipment.
These are the features I have played with so far :-
Dial plans, create extensions, assign numbers and telephony features to those extensions.
Soft and hard SIP phones, including the same EyeBeam softphone client.
Voice mail. Messages are recorded to .wav files on the server.
Auto attendant, create menu structures such as “Press 1 for voicemail”.
MP3 music on hold.
I have got it running at home on my Ultra 5 and it works very well. It’s actually rather too much for home use but it makes a very good platform to learn about the setup and maintenance of an IP PBX. The software is supplied with a demo configuration and this demonstrates back to back (PBX to PBX) test calls to an Asterisk development server in the US via the internet.
For the moment I have no connection from my home server to the local PSTN network so all calls are SIP only. The software development of Asterisk is primarily supported by a company which makes TDM interface PCI cards for PCs called Digium:-
http://www.digium.com/en/index.php
The application documentation is still rather sparse but an O’Reilly book is available online for free, this is what I have been reading to setup a simple dial plan at home :-
http://www.asteriskdocs.org/
The last couple of days have been something of an epiphany for me, I’m used to trying to sell this kind of stuff for millions and yet here it is for free (as in speech and beer).
Now when someone asks what I’ve been doing with “all that Sun stuff” I say “running my own private branch exchange!”.
For more information and Solaris .pkg binaries see this site :-
http://www.solarisvoip.com/