Cabletron Systems DLE52-MA User Manual page 53

b. Verify that the cabling being used is Category 5 UTP with an
impedance between 85 and 111 ohms. If the port is to operate at
100 Mbps, category 5 cabling must be used.
c. Verify that the device at the other end of the twisted pair segment
is on and properly connected to the segment.
d. Verify that the RJ45 connectors on the twisted pair segment have
the proper pinouts (Figure 3-3 and Figure 3-4) and check the cable
for continuity. Typically, a crossover cable is used between a
switching or hub device and an end user (computer). A
straight-through cable is used between hub devices.
NOTE:
RX+/RX– and TX+/TX–
must share a common
color pair.
Figure 3-3 Cable Pinouts - (RJ45) Crossover Cable
NOTE:
RX+/RX– and TX+/TX–
must share a common
color pair.
Figure 3-4 Cable Pinouts - (RJ45) Straight-Through Cable
DLE02-MA/DLE52-MA User's Guide
TO
SmartSwitch RJ45 Port
RX+
1
RX– 2
TX+
3
TX–
6
TO
SmartSwitch RJ45 Port
RX+
1
RX– 2
TX+
3
TX–
6
Connecting to the Network
Other Device Port
RJ45 to RJ45
Other Device Port
RJ45 to RJ45
TO
RX+
1
RX–
2
TX+
3
TX–
6
2159_04
TO
RX+
1
RX–
2
TX+
3
TX–
6
3-7