Hoover.com or RHI (Robert Half International) are good sources for salary info. They maybe a little optimistic and may not have adjusted to the recent eceonomic conditions.
For what it's worth, a bit of my recent salary history is:
1986 - 1993 Phone tech $25 to $40K
1993 - 1995 - Telecom Manager $55K - Dallas TX
1995 - 1998 - contacting $25 to $40 an hour - Dallas Ft worth area
1998 - 2000 - Telecom Manager $80k Ft Worth
2001 - out of work
Austin
2002 - present $60k in little ole Meridian, MS
On the one hand those of us who manage PBXs are well compensated (myself having little formal education) on the other hand they can't pay us enough. The thing is to prove it. IT (and IT personel) are, in my experience, considered non revenue generating, expensive, evil, money pits. I keep close track of every thing I do in two area. Make the company more productive and save money. More productive as in, using voice mail boxes as auto attendants so the the caller can transfer to a cell phone or pager and find the person they called. Save money by buying refurbed phones from the secondary market at half the cost, deleting old circuits, ect. There is a lot of low hanging fruit out there for those of us who know what we are doing. At one job I got $15k bonus based on money saved. Where I'm at now I got an some unusual compensation. Two very nice guitars and two very nice guitar amplifiers worth about $6k.
I'm gonna create another post on this subject. Maybe we can share ideas of how we save money for our companies