G&D RS232 Bedienungsanleitung Seite 17

Guntermann & Drunck GmbH Installation and operating manual
for RS232 extenders
Cat.5 cable faulty
Cat.5 cable is not plugged in properly
A "Crossover" cat.5 cable is plugged in (crossover cables are normally
used for "Uplink" connections between Ethernet hubs, and the wiring
in the cable runs crosswise.)
The cable is (much) too long
Logic module LC4128V is not programmed
One device in standard mode and one in slow mode have been
connected to one another
Interruption in a wire pair in the cat.5 cable
Cat.5 cable too long
Poor plug connections
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