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3040/V35
139001UA
2-8
INSTALLATION AND OPERATIONS MANUAL
SETUP & INSTALLATION
PATTON ELECTRONICS CO.
DTR / DSR Forced Active (JP8 thru JP12)
DTR is tied to DSR on each of the Sub-Channel ports. If the device connected does not
supply a DTR but requires DSR (DTE) or does not supply DSR but requires DTR (DCE),
installing the forced DTR/DSR jumper (JP8-JP12) for the appropriate Sub-Channel will solve
this problem. The line is forced to +8V via an 820W resistor, providing isolation to any driver
that might be on the interface.
Channel Jumper Channel Jumper
Master JP8 3 JP11
1 JP9 4 JP12
2 JP10
FACTORY Test Jumpers (JP1, JP2 and JP3)
The three test jumpers JP1, 2 and 3, must be installed for the unit to properly function. These
jumpers are used in the manufacture and test of the product prior to shipment.