NETGEAR GS108T-100NAS manual Patch Cables, RJ-45 Plug and RJ-45 Connectors

GS108T Smart Switch Software Administration Manual

located. NEXT measures the amount of energy that is “returned” to the sender end. The factors that affect NEXT and cross talk are exactly the same as outlined in the “Return Loss” section. The cross-talk performance is directly related to the quality of the cable installation.

Patch Cables

When installing your equipment, replace old patch panel cables that do not meet Category 5e specifications. As pointed out in the “Near End Cross Talk” section, this near end piece of cable is critical for successful operation.

RJ-45 Plug and RJ-45 Connectors

In a Fast Ethernet network, it is important that all 100BASE-T certified Category 5 cabling use RJ-45 plugs. The RJ-45 plug accepts 4-pair UTP or shielded twisted-pair (STP) 100-ohm cable and connects into the RJ-45 connector. The RJ-45 connector is used to connect stations, hubs, and switches through UTP cable; it supports 10 Mbps, 100 Mbps, or 1000 Mbps data transmission.

Figure C-4shows an RJ-45 plug and RJ-45 connector with built-in LEDs.

Figure C-4

Table C-2lists the pin assignments for the 10/100 Mbps RJ-45 plug and the RJ-45 connector.

Table C-2. 10/100 Mbps RJ-45 Plug and RJ-45 Connector Pin Assignments

Pin	Normal Assignment on Ports 1 to 8	Uplink Assignment on Port 8
1	Input receive data +	Output transmit data +
2	Input receive data –	Output transmit data –
3	Output transmit data +	Input receive data +
C-6		Network Cabling

v1.0, December 2007