Cisco Catalyst 2900 Series XL 24 Port Network Switch.  I have a few of these and they all power up and a few have a slightly louder fan.  See photos for physical condition. 

I purchased this from a local city.

Tag: C-O4156, C-P4157, C-G4158, C-T4159, C-B4160 - 7.05

Bin: 19A-OSU-COB