[c-nsp] 12V DC input on 2950

[Nathan Ward]

We're trying to mount a 2950 in a vehicle as a mobile lab for testing our
wireless network.

There is a 12VDC marking on the back of the chassis next to a plug, which
I understand is for the Cisco RPS chassis to connect in.

We've found the pinout for the connector, and it mentions -48VDC on some
pins and 12VDC on others.
Does anyone know if the -48 is required? Or can we just feed it 12VDC on
the pins marked for it?