Allied-telesis AT-8550SP User Manual download pdf (Page 25)

AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide

For 10 Mbps, the port requires Category 3 or better 100 ohm shielded or

unshielded twisted pair cabling. For 100 or 1000 Mbps operation, the ports

require Category 5 or Enhanced Category 5 (5E) 100 ohm shielded or

unshielded twisted pair cabling.

Auto-MDI/MDI-X

The ports are auto-MDI/MDI-X. They automatically configure themselves

as either MDI or MDI-X. This feature allows you to use a straight-through

twisted pair cable to connect any type of device to a port.

Note

The auto-MDI/MDI-X feature on a 10/100/1000Base-T port is

functional only when the port is set to Auto-Negotiation. If you

disable Auto-Negotiation and set the port’s speed and duplex mode

manually, the port defaults to MDI-X. For instructions on configuring

a port, refer to the AT-S62 Management Software User’s Guides.

Port Pinouts

For the pinouts of these ports when operating at 10 or 100 Mbps, refer to

Table 12 on page 83. For port pinouts when the ports are operating at

1000 Mbps, refer to Table 14 on page 84.

100Base-FX

Fiber Optic Ports

This section applies to the AT-8516F/SC switch.

Type of Connector

The fiber optic ports on the AT-8516F/SC switch have dual SC connectors.

Speed

The fiber optic ports have a fixed operating speed of 100 megabits per

second (Mbps). The speed cannot be changed.

Duplex Mode

The fiber optic ports can operate in either half- or full-duplex mode. You

can set the duplex mode manually or allow the switch to set it

automatically through Auto-Negotiation.

Maximum Distance

Each fiber optic port has a maximum operating distance of two kilometers

(1.25 miles) when operating in full-duplex mode and 412 meters (1,360

feet) when operating in half-duplex mode.

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Allied-telesis AT-8550SP User Manual Page 25