Ive been running a VOIP setup for awhile now but i went all out just because I can get the Equipment cheap ( Actuall i can sell it cheap also if you need any Cisco let me know) Currently my Setup is a 2621XM running CME, that then goes into my C3750-48TS-S then my 7960G phones branch out from...
Could possibly be bad nvram causing it to not allow the image to bootup. Or like someone said previously corrupted image or flash. Let me know if you need a new one ive got a pretty good stock of them. PM me for details or email brandon@optimumdata.com