Allied Telesis MMC10G Series, Руководство по установке

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Chapter 1: Overview
20
Twisted-Pair Port
Here are the basic features of the twisted-pair (copper) port on the
MMC10GT/SP:

1Gbps or 10Gbps

IEEE 802.3u Auto-Negotiation compliant

Auto MDI/MDI-X

100 meters (328 feet) maximum operating distance

RJ45 connector
The twisted-pair port features an eight-pin RJ45 connector that uses all
eight pins at 1Gbps or 10Gbps. For the port pinouts, see “RJ45 Connector
and Port Pinouts” on page 65.
Note
For twisted-pair port cabling specifications, refer to “Cabling
Guidelines” on page 56.
Auto-Negotiation
or Full-Duplex
The MMC10GT/SP Media Converter supports Auto-Negotiation at 1Gbps
or 10Gbps. The copper port will only link at the speed of the installed
SFP+ module. For example, if a 10G SFP+ module is installed, the copper
port can only link at 10G.
Auto MDI/
MDI-X
The 10Gbps RJ45 twisted-pair port on MMC10GT/SP can have one of two
possible wiring configurations: MDI or MDI-X.
The media converter features Auto MDI/MDI-X. The twisted-pair port
automatically determines the configuration of the port on the device to
which it is connected and then configures itself appropriately.
This feature allows you to use a straight-through cable when connecting
any type of device to the media converter, regardless of the wiring
configuration of the port on the device.
Loopback Tests
Loopback tests are used to test the fiber optic network connection. In
loopback mode, the copper port is disabled and the fiber port is set to loop
all packets back to the sender, or generate packets, depending on the DIP
switch setting. A linked switch port can transmit test packets over the fiber
optic cable, which are then looped back by the connected MMC10G. As it
receives its original test packets, it checks for lost packets and packets
with errors, and displays the results in statistic counters. Figure 4 on page
21 shows a successful test, using an Allied Telesis switch as the link
partner.