Installing The Patch Cord; Twisted-Pair Cable/Connector Pin-Outs - HP OfficeConnect 1820 8G Installation And Getting Started Manual

Installing the Patch Cord

As shown in the illustration below, connect the patch cord to the transceiver with the section of single mode
fiber plugged in to the Tx (transmit) port. Then, connect the other end of the patch cord to your network
cabling patch panel, or directly to the network multimode fiber.
If you connect the patch cord directly to the network cabling, you may need to install a female-to-female
adapter to allow the cables to be connected together.
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1 To network multimode cabling
2 Gigabit-LX port
3 Single mode section plugs into Tx port on Gigabit-LX transceiver or Gigabit-LX mini-GBIC
4 The multimode cable in the patch cord must match the characteristics of your network cable
Make sure you purchase a patch cord that has appropriate connectors on each end, and has multimode fibers
that match the characteristics of the multimode fiber in your network. Most important, the core diameter of the
multimode patch cord must match the core diameter of the multimode cable infrastructure (either 50 or 62.5
microns).

Twisted-Pair Cable/Connector Pin-Outs

The Auto-MDIX Feature:
In the default configuration, "Auto", the fixed 10/100/1000BASE-T ports on the switches all automatically
detect the type of port on the connected device and operate as either an MDI or MDI-X port, whichever is
appropriate. So for any connection, a straight-through twisted-pair cable can be used—you no longer have
to use crossover cables, although crossover cables can also be used for any of the connections. (The
10/100/1000-T ports support the IEEE 802.3ab standard, which includes the "Auto-MDIX" feature.)
If you connect a switch twisted-pair port to another switch or hub, which typically have MDI-X ports, the switch
port automatically operates as an MDI port. If you connect it to an end node, such as a server or PC, which
typically have MDI ports, the switch port operates as an MDI-X port. In all cases, you can use standard
straight-through cables or crossover cables.
If you happen to use a correctly wired crossover cable, though, the switch will still be able to automatically
detect the MDI/MDI-X operation and link correctly to the connected device.
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Installing the Patch Cord 39