Cables And Pinouts; Twisted-Pair Cable Assignments; Auto-Negotiation / Mdi-X Support; 10/100Base-Tx Pin Assignments - AMX NXA-ENET8-2POE Operation/Reference Manual

Cables and Pinouts

Twisted-Pair Cable Assignments

For 10/100BASE-TX connections, a twisted-pair cable must have two pairs of wires.
For 1000BASE-T connections the twisted-pair cable must have four pairs of wires.
Also, an RJ-45 connector must be attached to both ends of the cable.
Each wire pair must be attached to the RJ-45 connectors in a specific orientation.
FIG. 23 illustrates how the pins on the RJ-45 connector are numbered. Be sure to hold the connectors in the
same orientation when attaching the wires to the pins.
FIG. 23 RJ-45 Connector
DO NOT plug a phone jack connector into the RJ-45 port. Use only twisted-pair
cables with RJ-45 connectors that conform with FCC standards.

Auto-Negotiation / MDI-X Support

Auto-negotiation MDI/MDIX means that every port on the switch will automatically detect the Ethernet cable
type being used (straight-through or crossover) and adjust to make a link over that cable.
The NXA-ENET8-2POE supports MDI-X on all ports. Therefore either cable type can be used.
Follow TIA-568B straight-through cabling standards.

10/100BASE-TX Pin Assignments

Use un-shielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45 connections: 100-ohm
Category 3 or better cable for 10 Mbps connections.
Be sure that the length of any twisted-pair connection does not exceed 100 meters
(328 feet).
NXA-ENET8-2POE Gigabit Ethernet Layer 2 PoE Switch
Cables and Pinouts
27