Allied Telesis X8106 manual Automatic Mdix Detection Port Pinouts

Chapter 1: Overview

Table 2. Twisted Pair Cable for the AT-SBx81GP24 Line Card

		10Mbps			100Mbps				1000Mbps
Cable Type
	Non-	PoE	PoE+	Non-		PoE	PoE+	Non-		PoE	PoE+
	PoE			PoE				PoE
Standard TIA/EIA 568-	Yes	No	No	Yes		No	No	No		No	No
B-compliant Category 3
shielded or unshielded
cabling with 100 ohm
impedance and a
frequency of 16 MHz.
Standard TIA/EIA 568-	Yes	Yes	No	Yes		Yes	No	Yes		No	No
A-compliant Category 5
shielded or unshielded
cabling with 100 ohm
impedance and a
frequency of 100 MHz.
Standard TIA/EIA 568-	Yes	Yes	Yes	Yes		Yes	Yes	Yes		Yes	Yes
B-compliant Enhanced
Category 5 (Cat 5e)
shielded or unshielded
cabling with 100 ohm
impedance and a
frequency of 100 MHz.
Standard TIA/EIA 568-	Yes	Yes	Yes	Yes		Yes	Yes	Yes		Yes	Yes
B-compliant Category 6
or 6a shielded cabling.

Automatic MDIX Detection

Port Pinouts

The 10/100/1000 Mbps twisted-pair ports on the AT-SBx81GT24, AT- SBx81GT40, and AT-SBx81GP24 Line Cards are IEEE 802.3ab compliant and feature automatic MDIX detection when operating at 10 or 100 Mbps. (Automatic MDIX detection does not apply to 1000 Mbps.) This feature automatically configures the ports to MDI or MDI-X depending on the wiring configurations of the end nodes.

Ports connected to network devices that do not support automatic MDIX detection default to MDIX.

You may disable automatic MDIX detection on the individual ports and configure the MDI/MDI-X settings manually with the POLARITY command.

Refer to Table 35 on page 239 for the port pinouts of the twisted-pair ports when they operate at 10 or 100 Mbps in the MDI configuration and Table 36 on page 239 for the MDI-X configuration. For port pinouts when the twisted-pair ports operate at 1000 Mbps, refer to Table 37 on

page 240.

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