HP DMXTM 400/430 Operator's Manual page 104

Cable Listings
STRAIGHT CABLE ( MXM)
Figure E-1 Null Modem Cable (MXM)
Note: Cable is used for typical connection to other DCE equipment
with Xon/Xoff flow control.
STRAIGHT CABLE (MM)
Figure E-2 Straight Cable (MM)
Note: Cable is used for typical connection to other DCE equipment
with Xon/Xoff flow control.
E-2 DMX400/430 Operator's Manual