need to learn Voip

Archived from groups: comp.dcom.voice-over-ip (More info?)

Being out of work for nearly 3 years, I really need to
get back into it.. My background is strictly class4/5
switch related in the call processing and signaling area, testing.

I'm noticing more and more jobs requiring Voip experience.

My question is: As I have no practical experience with
Voip, is there a way I can at least learn the high to
mid level stuff? I'd really like to learn all of the
Voip interfaces like PSTN to Voip, Wireless to Voip, etc.

Although I'm wondering if just being self taught on Voip
would help me land a job?

I'd appreciate any info and/or links.

Regards,

Ray