Cabletron Systems SmartSTACK 10 ELS10-26, User Manual

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Technical Specifications
A-5
Each twisted-pair link segment must have a male connector attached to
both ends. According to the 10BASE-T specification, pins 1 and 2 on the
connector are used for receiving data; pins 3 and 6 are used for
transmitting data, as shown in Table A-3.
a. The “+” and “-” signs are used to represent the polarity of the two
wires that make up each wire pair.
A.4 STRAIGHT-THROUGH WIRING
If the twisted-pair link segment is to join two ports on a switch,
and only one of the ports has an internal crossover, the two pairs of
wires must be straight-through, as shown in Table A-4.
Table A-3. 10BASE-T Pin Assignments
Pin Assignment
a
1 Rx+
2 Rx-
3 Tx+
6 Tx-
Table A-4. Straight-Through RJ45 Pin Assignments
ELS10-26 (Crossed) Device (Not Crossed)
1 (Rx+) 1 (Tx+)
2 (Rx-) 2 (Tx-)
3 (Tx+) 3 (Rx+)
6 (Tx-) 6 (Rx-)