3Com NETBuilder SI manual LAN Connector, Either 10BASE-T or 100BASE-TX cabling, Ethernet Connector

LAN Connector and Cables 165

LAN Connector and	The two Ethernet connectors, labeled L1 and L2, can be cabled using
Cables	either 10BASE-T or 100BASE-TX cabling.
	Boundary router models can use only the L1 Ethernet port. If you upgrade
	to full router software, the second port will be functional.
	The following figure shows the pinouts of the L1 and L2 connectors
	(RJ-45). The connector bodies connect the cable shield to chassis ground.
	Figure 20				Ethernet Connector
			TX-		RX-
		TX+		RX+
	1 2 3 4 5 6 7 8

RJ-45 female (shielded)

10BASE-T Cabling Table 21 lists supported 10BASE-T cable types and emissions classes.

Table 21 10BASE-T Cable Types and Emissions Compliance

		Emissions Compliance*
Cable Type		FCC and VCCI Class A	EN55022 Class B
UTP†	100 ohm:
	Category 3	yes	no
	Category 4	yes	no
	Category 5	yes	no
Shielded TP†	100 ohm:
	Category 3	yes	yes
	Category 4	yes	yes
	Category 5	yes	yes

* Shielding of all cable types should be terminated 360 degrees at the cable plug.

†All UTP compliance testing was accomplished using cables built with Stewart Connector Co. connector, part number 940 SP-36-08-08.