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5.4.3
Twisted Pair Cable Length
The TP-PMD FDDI standard specifies the following:
Maximum total cable length:
Maximum twisted pair
cable length between
adjacent nodes:
5.5
TWISTED PAIR PINOUT CONFIGURATION
This section provides the RJ45 pinout configuration for Unshielded
Twisted Pair (UTP) and Shielded Twisted Pair (STP) Physical Layer
Medium Dependent (PMD) ports.
When connecting two twisted pair ports together, a transmit
and receive cross-over must occur between the two devices
(within the cable).
DELHF-UA User's Guide
Twisted Pair Pinout Configuration
1 2 3 4 5 6 7 8
1. Transmit +
2. Transmit -
3. N/A
4. N/A
Figure 5-1 RJ45 TP-PMD Port
100 km (62 miles) — dual ring
200 km (124 miles) — wrapped
100 m (328.1 feet)
5. N/A
6. N/A
7. Receive +
8. Receive -
5-7
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