Cabletron Systems 6E133-25 - Manual (Page 169)

6E128-26, 6E138-25, 6E129-26 and 6E139-25 User’s Guide B-1
APPENDIX B
FE-100TX, FE-100FX AND FE-100F3
SPECIFICATIONS
The 6E12X-26 supports three Fast Ethernet Interface Modules:
• FE-100TX
• FE-100FX
• FE-100F3
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 with 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
X side, the pairs are internally crossed
over. If the switch is on the = side, the pairs are not internally crossed
over. Figure B-1 shows the pinouts for the FE-100TX in both positions.
Figure B-1 FE-100TX Pinouts
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC 5. NC
6. TX-
7. NC
8. NC
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC 5. NC
6. RX-
7. NC
8. NC
FE-100TX
10
16651_05
100
= x