User`s manual

Functional Description 55
cPCI-3920
Rear I/O Interfaces on CompactPCI Connector rJ2
The cPCI-3920 Rear Transition Module conducts a wide range of
I/O signals through the Rear I/O connector rJ2.
To support the Rear I/O feature a special backplane is necessary.
Do not plug a Rear I/O configured board in a non-system slot Rear
I/O backplane. Failure to comply with the above may result in
damage to your board.
CompactPCI Connector rJ2