2.6.2 Installing Fiber-optic Cable

Refer to the appendix for cable specifications for the 10BASE-FL or the 100BASE-FX fiber-optic installation.

Installing Cable

1.Locate or build 10BASE-FL-compliant or 100BASE-FX-compliant cables (depending upon Multichannel Media Converter selected for the site), with male two-stranded TX to RX connectors installed at both ends.

2.Connect TX and RX connectors at one end of cable to mating Multichannel Media Converter TX and RX fiber-optic connector.

3.Connect cable with connector installed at TX location on Multichannel Media Converter channel to RX location on attached network device.

TX

TX

RX

RX

4.Connect cable with connector installed at RX location on Multichannel Media Converter channel to TX location on attached network device.

Testing Fiber Link(s)

NOTE: The Link Test switch (DIP switch #7) enables and disables the Link

Test feature for a block of six (6) Multichannel Media Converter channels.

When the Link Test feature is enabled (set to NORMAL position), if the Multichannel Media Converter senses loss of a twisted-pair link, the associated fiber-optic link is cut. Then the remote device senses loss of the fiber-optic link and, if the remote device is another Multichannel Media Converter also set to NORMAL mode, the remote Multichannel Media Converter disables the twisted-pair port. Finally the remote device becomes aware that the link to the opposite end device connected to this channel is not fully functional and subsequently triggers a back-up mechanism (if so equipped) and/or alerts the network manager.

Thus, when the Link Test feature is enabled (set to NORMAL position), if a Multichannel Media Converter does not detect a good link on the twisted- pair 10BASE-T /100BASE-TX side of any channel, the Multichannel Media Converter disables all data transmission (including active-idle) on the fiber-optic 10BASE-FL/100BASE-FX side of that channel.

However, the network administrator facing a device with no link indication cannot tell whether that no link indication is due to the loss of the fiber-optic link or due to loss of the remote twisted-pair link.

Therefore, when installing a fiber-optic network, disable the Link Test feature (set to TEST position) to establish that the Multichannel Media Converter fiber-optic links are operational and THEN connect network devices through the twisted-pair links.

2.10

METTF10xx, MFETF10xx

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Transition Networks DVP 5140K manual Installing Fiber-optic Cable, Installing Cable, Testing Fiber Links

DVP 5140K specifications

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