AD380A and AD381A Installation Guide

Cable specifications
AD380A (copper)
The AD380A 2–Port GbE adapter can use existing UTP CAT5 (or better) cable to deliver Gigabit
Ethernet over copper, according to the IEEE 802.3ab specifications. For new installations, CAT5e
(enhanced CAT5) cable is recommended.
Maximum distance for Gigabit over copper cable is 100 meters (328 feet).
To connect to the network, the AD380A card requires the following cable for 1000Base-T
transmission:
CAT5 UTP or better twisted-pair
22-26 AWG, 100Ω @ 1 MHz
EIA/TIA 568a or EIA/TIA 568b
AD381A (fiber)
The AD381A 2-Port GbE adapter can use existing multimode fiber cable to deliver Gigabit
Ethernet over fiber, according to the IEEE 802.3z specifications.
Maximum distances for Gigabit over fiber cable are up to 550 meters (1804 ft).
To connect to the network, the AD381A 2-port GbE adapter uses a 1000Base-SX fiber transceiver
with low-profile LC fiber connectors. The maximum distance specifications for this adapter are
as follows:
Table 2-2 Operating distances for AD381A adapter
Maximum DistanceSizeMode
220 meters62.5/125 μmMultimode
550 meters50/125 μmMultimode
RJ-45 pinouts and crossover function (applies to AD380A only)
The Ethernet standard also specifies that each segment implement a crossover function to connect
the transmitter of one device to the receiver of a device at the other end. The crossover function
may be implemented internally at the hub or switch or externally through the twisted-pair media.
10/100 pinouts using internal, straight-through crossover
If the crossover function is implemented internally, the port is labeled MDI-X (Medium Dependent
Interface-Crossover). When an MDI-X port is connected to an MDI port, the twisted pair media
should be wired straight-through using the physical pinouts indicated.
PinFunctionColor matchFunctionPin
1TD+OrangeTD+1
2TD–Orange/WhiteTD–2
3RD+GreenRD+3
4Blue/White4
5Blue5
6RD–Green/WhiteRD–6
7Brown7
8Brown/White8
20 Specifications and Regulatory Information