Allied-telesis AT-8550SP User Manual Page 48

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Installation
48
Planning the Installation
Table 8 contains the cabling specifications for the twisted pair ports.
Note
The twisted pair ports on the switch feature auto-MDI/MDI-X. They
configured themselves automatically as MDI or MDI-X when
connected to an end node. This allows you to use a straight-
through twisted pair cable when connecting any type of network
device to a port on the switch.
The auto-MDI/MDI-X feature is disabled if you disable Auto-
Negotiation on a port and set a port’s speed and duplex mode
manually using the AT-S62 management software. A port where
Auto-Negotiation has been disabled defaults to MDI-X. Disabling
Auto-Negotiation may require that you manually configure a port’s
MDI/MDI-X setting or use a crossover cable.
Table 8 Twisted Pair Cabling and Distances
Model Speed Type of Cable Maximum
Operating
Distance
AT-8524M
AT-8524POE
AT-8550GB
AT-8550SP
10 Mbps Category 3 or better
100 ohm shielded or
unshielded twisted
pair cable
100 m (328 ft)
100 Mbps Category 5 or
Category 5E
(Enhanced) 100 ohm
shielded or
unshielded twisted
pair cable
100 m (328 ft)
AT-8550GB
AT-8550SP
(Ports 49R and
50R)
1000 Mbps Category 5 and
Category 5E
(Enhanced) 100 ohm
shielded or
unshielded twisted
pair cable
100 m (328 ft)
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