Allied Telesis AT-MCF112VF, SM, LH - Manual (Page 28)

Installation
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If one end node is capable of only half-duplex mode while the other end
node will auto-negotiate the duplex mode, set the channel setting to
half-duplex. (Failure to set the channel to half-duplex in this situation
will result in what is referred to as a classic duplex mode mismatch,
where one node will operate in half-duplex while the other node will
operate in full-duplex. This can result in poor network performance.)
10. Press the Reset button on the front of the unit.
11. Go to “Troubleshooting” on page 25 for instructions on how to test the
media converter.
Installing the Media Converter in a Rack
To install the unit in a 19-inch rack, perform the following steps:
1. Remove all equipment from the shipping package and store the package
in a safe place.
Caution
Do not remove the dust covers from the fiber optic ports on the media
converter until you are ready to connect the cables. Dust contamination
can adversely impact the operation of the fiber optic ports.
2. Select a level, secure surface to prepare the media converter.
3. If you purchased an optional redundant power supply for the media
converter, install the redundant power supply by following the directions
included with the unit.
Note
Do not remove the panel covering the expansion slot for the redundant
power supply unless you intend to install the unit.
4. Place the mounting bracket over the mounting holes on one side of the
unit.