Allied Telesis AT-9448Ts/XP (Basic Layer 3) - Manual (Page 20)

Chapter 1: Overview
20
Cable Type Table 2 lists the cabling specifications for the 10/100/1000Base-T twisted
pair ports.
Auto-MDI/
MDI-X
The twisted pair ports are IEEE 802ab-compliant and feature auto-MDI/
MDI-X. This feature, available when a port’s speed and duplex mode are
set through Auto-Negotiation, automatically configures a switch port to
MDI or MDI-X depending on the wiring configuration of the port on the end
node. This allows you to connect any network device to a port on the
switch using a straight-through twisted pair cable.
If Auto-Negotiation is disabled on a port and the speed and duplex mode
are set manually, the auto-MDI/MDI-X feature is also disabled and the
port’s wiring configuration defaults to the MDI-X setting. This setting can
be configured with the AT-S63 Management Software.
Port Pinouts Table 12 on page 103 has the port pinouts when the twisted pair ports are
operating at 10 or 100 Mbps in the MDI configuration. Table 13 on
page 103 has the port pinouts for the MDI-X configuration. Table 14 on
page 104 has the port pinouts for twisted pair ports that are operating at
1000 Mbps.
Table 2. Twisted Pair Cabling and Distances
Speed Cable Type
Maximum
Operating
Distance
10 Mbps Standard TIA/EIA 568-B-compliant
Category 3 or better shielded or
unshielded cabling with 100 ohm
impedance and a frequency of 16
MHz. 100 m (328 ft)
100 Mbps Standard TIA/EIA 568-A-compliant
Category 5 or TIA/EIA 568-B-
compliant Enhanced Category 5 (Cat
5e) shielded or unshielded cabling
with 100 ohm impedance and a
frequency of 100 MHz. 100 m (328 ft)
1000 Mbps Standard TIA/EIA 568-A-compliant
Category 5 or TIA/EIA 568-B-
compliant Enhanced Category 5 (Cat
5e) shielded or unshielded cabling
with 100 ohm impedance and a
frequency of 100 MHz. 100 m (328 ft)