Can anyone identify this data cabinet manufacturer

I need help identifying this cabinet or maybe advice on accessing the rear of the unit. I assumed that it swung open as do many similar cabinets but I can't find a release latch nor will it pull open. There are no labels that identify who the manufacturer is. I need to access the patch panel to terminate several cables and thought that I would be able to unscrew the panels from the rack but they are secured by screws I do not recognize (not Philips or Allen). Oh yeah, they use Yoan key locks if that helps at all. Thanks for any help you can give.



Larry Reid
Reid Telesys Communications