Specifications; Fe-100Tx; B.1 Fe-100Tx - Cabletron Systems 2E48-27R User Manual

FE-100TX, FE-100FX, AND FE-100F3
The 2E4X-27R supports three Fast Ethernet Interface Modules:
•

FE-100TX

• FE-100FX
• FE-100F3 (Section
This appendix provides the specifications for these modules.
B.1 FE-100TX
The FE-100TX uses an RJ45 connector supporting Category 5
Unshielded Twisted Pair (UTP) cabling.
To ensure proper operation, use only Category 5 Unshielded
NOTE
Twisted Pair (UTP) cabling that has an impedance between 85
and 111 ohms.
The slide switch on the FE-100TX determines the crossover status of the
cable pairs. If the switch is on the
over. If the switch is on the = side, the pairs are not internally crossed
over. Figure B-1
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
2E48-27R/2E49-27R User's Guide
APPENDIX B

SPECIFICATIONS

(Section B.1)
(Section B.2)
B.3)
shows the pinouts for the FE-100TX in both positions.
5. NC
6. TX-
7. NC
8. NC
Figure B-1 FE-100TX RJ45 Pinouts
side, the pairs are internally crossed
X
x
=
10
100
FE-100TX
Position =
(not crossed over)
5. NC
1. TX+
6. RX-
2. TX-
7. NC
3. RX+
8. NC
4. NC
16651_05
B-1