Duplex Mode; Wiring Configuration; Maximum Distance - Allied Telesis x530L Series Installation Manual

Chapter 1: Overview

Duplex Mode

Wiring
Configuration
Maximum
Distance
26
The twisted pair ports can operate in either half- or full-duplex mode at
10 Mbps and 100 Mbps and full-duplex only at higher speeds.
The duplex mode of a port operating at 10 Mbps or 100 Mbps, like port
speed, can be set manually using the management software or
automatically with Auto-Negotiation (IEEE 802.3u), the default setting.
The speed and duplex mode settings of a port can be set independently of
each other. For example in the case of a 10 Mbps or 100 Mbps port, it can
be configured such that its speed is set manually while its duplex mode is
established through Auto-Negotiation.
Note
Switch ports default to half-duplex mode when connected to
10 Mbps or 100 Mbps network devices that do not support Auto-
Negotiation. If a network device supports full-duplex only, a duplex
mode mismatch can occur, resulting in poor network performance.
To prevent this, disable Auto-Negotiation and set the duplex mode
manually on ports connected to 10 Mbps or 100 Mbps devices that
support full-duplex only.
The wiring configuration of a port operating at 10 Mbps or 100 Mbps can
be MDI or MDI-X. The wiring configurations of a switch port and a network
device connected with straight-through twisted pair cabling must be
opposite, such that one device is using MDI and the other MDI-X. For
example, a switch port must be set to MDI-X if it is connected to a network
device set to MDI.
The wiring configurations of the ports can be set manually or automatically
by the switch with auto-MDI/MDI-X (IEEE 802.3ab-compliant). This feature
enables the switch to automatically negotiate with network devices to
establish their proper settings.
The MDI and MDI-X settings do not apply when ports are operating at a
speed of 1 Gbps.
The ports have a maximum operating distance of 100 meters (328 feet).