VOIP

A recent OpenSSH version added support for TUN devices under Linux, Windows and I believe a few other operating systems. With VTLs, you lose a few of the features of the 'local' network like button status and other goodies. Since you can setup SSH to do layer-2 now, you could in theory have decent multi-site support that is encrypted across the internet through one port. It would bump up traffic going back and forth quite a bit between sites, but it just might work.

You could also do the same type of thing with OpenVPN, but I'm more comfy with SSH so far.

We needed to be certified to keep selling/supporting the phone systems we do, so I took the test and got it over with today. It was actually a bit more tricky than I expected. There were also a surprising number of grammatical errors. I know I'm not the best in that regard, but it was a bit confusing.

You can read more about it here:
http://www.3com.com/support/en_US/training/certified_IP_telephony_expert.html

Just another notch on my belt.