Allied Telesyn International Corp AT-9448Ts/XP Installation Guide download pdf (Page 22)

Chapter 1: Overview

10/100/1000Base-T Twisted Pair Ports

This section describes the twisted pair ports on the switches.

Connector Type The ports are 8-pin RJ-45 connectors that use four pins at 10 or 100 Mbps

and all eight pins at 1000 Mbps. For the pin assignments, refer to “RJ-45

Twisted Pair Port Pinouts” on page 95.

Speed A port’s speed can be 10, 100, or 1000 Mbps. The speed can be set

automatically through Auto-Negotiation, the default setting, or manually

with the AT-S63 Management Software.

Note

To operate at 1000 Mbps, a twisted pair port must be set to Auto -

Negotiation. The speed of a twisted pair port cannot be manually set

to 1000 Mbps.

Duplex Mode A twisted pair port can operate in either half- or full-duplex mode. (Full-

duplex mode is the only mode available when a port is operating at 1000

Mbps.) The twisted pair ports are IEEE 802.3u-compliant and Auto-

Negotiate the duplex mode setting.

You can disable Auto-Negotiation on one or all of the switch ports so that

you can set the duplex mode manually through the AT-S63 Management

Software.

Note

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

mode with a 10 or 100 Mbps end node, the end node should also be

configured for Auto-Negotiation. Otherwise, a duplex mode

mismatch can occur. A switch port using Auto-Negotiation defaults

to half-duplex if it detects that the end node is not using Auto-

Negotiation. This results in a mismatch if the end node is operating

at a fixed duplex mode of full-duplex.

To avoid this problem when connecting an end node with a fixed

duplex mode of full-duplex to a switch port, use the AT-S63

Management Software to disable Auto-Negotiation on the port and

set the port speed and duplex mode manually.

Maximum

Distance

The ports have a maximum operating distance of 100 meters (328 feet).

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Allied Telesyn International Corp AT-9448Ts/XP Installation Guide Page 22