Recommended Wiring

The cable system for the Ethernet communications network consists of unshielded point-to-point twisted pair network links. Each link consists of a transmit pair and a receive pair.

Note:  The integrity of each of the twisted pairs must be preserved. Do not split one of the twisted pairs and use one wire from that pair for transmit traffic and the other for receive traffic, for example.

The following unshielded twisted pair cable is recommended as in-store wiring for Ethernet LANs.

• AT&T SYSTIMAX 1061 up to 100 m (328 ft) If other signals are not run on the other pairs, they should be grounded at both ends, if possible.

• AT&T SYSTIMAX 1010 up to 50 m (164 ft) This cable can be used in a low noise environment, no other signals run on the unused pairs.

• Lucent SYSTIMAX 2061 up to 100 m (328 ft) This cable is the same as the 1061 except it is plenum rated.

• Lucent SYSTIMAX 2010 up to 50 m (164 ft) This cable is the same as 1010 except it is plenum rated.

Unused pairs should be grounded at both ends if the wiring scheme allows it (grounding strip or posts in boxes). If grounding is not available, either twist the wires back and wrap them around the cable, or clip them off.

Other Wiring

Unshielded cable other than the cable recommended in the preceding section may be used for Ethernet if the cable is rated EIA/TIA Category 3 or better.

Unused pairs should be grounded at both ends if the wiring scheme allows it (grounding strip or posts in boxes). If grounding is not available, you can either bend the wires back and wrap them around the cable, or clip them off.