Allied Telesis AT-GS2002 Series, Installation Manual

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Chapter 1: Overview
18
Note
In order for a converter 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 converter 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.
Maximum Distance
The twisted pair port on the AT-GS2002 Series converters have a
maximum operating distance of 100 meters (328 feet).
Type of Cabling
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 twisted pair ports on the bridging converters are auto-MDI and IEEE
802.3ab-compatible. When a port's speed and duplex mode are set
through Auto-Negotiation, the port uses the auto-MDI feature to
automatically configure itself as MDI or MDI-X when connected to an end-
node. Consequently, you can use either a straight-through or crossover
twisted pair cable when connecting any network device to a port. The
Auto MDI/MDI-X feature is always enabled even when the speed and
duplex mode on a port are set manually.
Port Pinouts
For the pinouts of these ports when operating at 10 or 100 Mbps in the
MDI configuration, refer to Table 8, “MDI Pin Signals (10/100Base-TX),”
on page 56. For the pinouts of the ports when operating at 10 or 100
Mbps in the MDI-X configuration, refer to Table 9, “MDI-X Pin Signals (10/
100Base-TX),” on page 57. For port pinouts when the ports are operating
at 1000 Mbps, refer to Table 10, “MDI and MDI-X Pin Signals (1000Base-
TX),” on page 57.