Ubiquiti Networks airFibe5X - Manual (Page 27)

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Chapter 1: Advanced Tab airFiber ® AF-5X User Guide
Ubiquiti Networks, Inc.
MGMT Port Ethernet Settings
MGMT Speed This is the speed of the Management port.
By default, the option is Auto. The AF-5X automatically
negotiates transmission parameters, such as speed and
duplex, with its counterpart. In this process, the networked
devices first share their capabilities and then choose the
fastest transmission mode they both support.
To manually specify the maximum transmission link
speed and duplex mode, select one of the following
options: 100 Mbps‑Full, 100 Mbps‑Half, 10 Mbps‑Full,
or 10 Mbps‑Half. If you are running extra long Ethernet
cables, a link speed of 10 Mbps could help to achieve
better stability.
Full-duplex mode allows communication in both
directions simultaneously. Half-duplex mode allows
communication in one direction at a time, alternating
between transmission and reception.