Allied Telesis AT-CM20x Series, Справочное руководство

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Converteon Media Converter Line Cards Reference Guide
31
10/100/1000Base-T Twisted Pair Ports
The 10/100/1000Base-T twisted pair ports featured on the Converteon™
line cards are described below.
Type of
Connector
The ports have 8-pin RJ-45 connectors. The ports use four pins when
operating at 10 or 100 Mbps and all eight pins when operating at 1000
Mbps.
Speed
The ports can operate at 10, 100, or 1000 Mbps. The speed is set
automatically through Auto-Negotiation or you can set the speed to 10 or
100 Mbps manually through the management software.
Note
Auto-Negotiation is activated as the default on the twisted pair port
on the converter. To deactivate Auto-Negotiation and set the speeds
manually, refer to the
AT-S70 Management Software User’s
Guide .
Duplex Mode
The10/100/1000Base-T twisted pair ports on a Converteon™ line cards
can operate in either half- or full-duplex mode. The twisted pair ports are
IEEE 802.3u-compliant and will Auto-Negotiate the duplex mode setting.
If desired, Auto-Negotiation on the converter ports can be disabled so that
you can set the duplex mode manually through the converter’s AT-S70
management software.
Maximum
Distance
The10/100/1000Base-T twisted pair ports have a maximum operating
distance of 100 meters (328 feet).
Type of Cable
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
The10/100/1000Base-T twisted pair 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.
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-S70 Management Software User’s Guides.