Allied Telesis AT-MMC200/LC, Installation Manual

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MMC2000/200 Series Mini Switching Media Converter Installation Guide
23
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When in the AUTO NEG (down) position, the twisted-pair port
operates in Auto-Negotiation mode.
Note
For the AT-MMC2000/T model, when the PORT 1 DIP switch is in
the AUTO NEG (down) position, both port 1 and port 2 operate in
Auto-Negotiation mode.
Note
100 Mbps full-duplex mode should not be used unless absolutely
necessary because forcing 100 Mbps full-duplex in most
applications is likely to cause a duplex mismatch, in turn, causing
poor network performance. 100 Mbps full-duplex mode should only
be used when the link partner is already forced to 100 Mbps
full-duplex operation, and Auto Negotiation is disabled on the link
partner. In this specific case, using Auto Negotiation on the media
converter would result in a duplex mismatch.
External AC/DC
Power Adapter
An external AC/DC power adapter is included with the media converter for
standalone operation. The power adapter supplies 12 VDC to the media
converter. Allied Telesis supplies a UL approved safety compliant AC
power adapter for the 120 and 240 VAC versions with a regulated output
of 12 VDC. The power required for the media converter is 12 VDC, 200
mA.
Note
The media converter power receptacle has a twist-and-lock barrel
which is locked by turning the power cord clockwise one-quarter
turn.