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AT-GS900/8PS Switch Installation Guide
19
Twisted Pair Ports
The AT-GS900/8PS Gigabit Ethernet Switch features 8 twisted pair ports,
respectively, that are 10Base-T, 100Base-TX, and 1000Base-T compliant.
The port speeds and duplex modes are determined automatically with
IEEE 802.3u Auto-Negotiation. The ports have a maximum operating
distance of 100 m (328 feet).
The twisted pair ports feature 8-pin RJ-45 connectors. For the port pinouts,
refer to “Connectors and Port Pinouts” on page 55.
Cable
Specifications
The cable requirements for the ports on the AT-GS900/8PS are listed in
Table 1.
Note
The twisted pair ports on the switch feature auto-MDI when
operating at 10, 100, or 1000 Mbps. A port is configured as MDI or
MDI-X when it is connected to an end-node. Consequently, you can
use a straight-through or cross-over twisted pair cable when
connecting any type of network device to a port on the switch.
MDI/MDI-X
Mode
The ports feature auto-MDI, which automatically configures the ports as
MDI or MDI-X. This feature allows you to use straight-through or cross-
over twisted pair cables when connecting to the end-nodes.
Table 1. Twisted Pair Cable Specifications for the AT-GS900/8PS
Cable Type 10Mbps 100Mbps 1000Mbps
Standard TIA/EIA 568-B-
compliant Category 3 shielded
or unshielded cabling with 100
ohm impedance and a
frequency of 16 MHz.
Yes Yes No
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.
Yes Yes Yes
Standard TIA/EIA 568-B-
compliant Category 6 or 6a
shielded cabling.
Yes Yes Yes