Allied-telesis AT-8550SP User Manual download pdf (Page 23)

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

Note

In order for a switch port to successfully Auto-Negotiate its duplex

mode with an end node, the end node should also be using Auto-

Negotiation. Otherwise, a duplex mode mismatch can occur. A

switch port using Auto-Negotiation will default to half-duplex if it

detects that the end node is not using Auto-Negotiation. This will

result in a mismatch if the end node is operating at a fixed duplex

mode of full-duplex.

To avoid this problem, when you connect an end node with a fixed

duplex mode of full-duplex to a switch port, you should use the

AT-S62 management software to disable Auto-Negotiation on the

port and set the port speed and duplex mode manually.

Maximum Distance

Each twisted pair port has a maximum operating distance of 100 meters

(328 feet).

Type of Cabling

For 10 Mbps operation, Category 3 or better 100 ohm shielded or

unshielded twisted pair cabling is required. For 100 Mbps operation,

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

twisted pair cabling is required.

Auto-MDI/MDI-X

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

themselves as either MDI or MDI-X, depending on the configuration of the

port on the end node. This feature allows you to use either straight-through

or crossover twisted pair cables to connect devices to the ports.

Note

The auto-MDI/MDI-X feature on a port is available only when the

port is set to Auto-Negotiation. If you disable Auto-Negotiation and

set a 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 port pinouts for the AT-8524M, AT-8550GB, and AT-8550SP

switches, refer to Table 12 on page 83. For the port pinouts for the

AT-8524POE switch, refer to Table 13 on page 83.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 89 90

No comments

Allied-telesis AT-8550SP User Manual Page 23