Enterasys Networks C1H124-24 - Manual (Page 42)

Connecting to the Network
3-14 Hardware Installation
3. Plug the other end of the cable into the appropriate port on the other device. Some cables may
be terminated at the other end with two separate connectors, one for each fiber-optic strand. In
this case, ensure that the transmit fiber-optic strand is connected to the receive port and the
receive fiber-optic strand to the transmit port.
4. Verify that a link exists by checking that the port Link/Activity LED is on (blinking green or
solid green). If the Link/Activity LED is off, perform the following steps until it is on:
a. Verify that the device at the other end of the segment is ON and connected to the segment.
b. If there are separate fiber-optic connections on the other device, check the crossover of the
cables. Swap the cable connections if necessary.
c. Check that the fiber-optic connection meets the dB loss and cable specifications outlined in
the Cabling Guide for multimode cabling. To obtain this document, refer to “ Related
Documents ” in About This Guide.
If a link has not been established, refer to Chapter 4 for LED troubleshooting details. If a
problem persists, refer to Section 1.12 for details on contacting Enterasys Networks for support.
5. Repeat steps 1 through 3, above, until all connections have been made.
3.5.3 Connecting Fiber-Optic Cables to LC Ports
This section describes how to connect
• a 1000BASE-SX multimode fiber-optic segment from the network or other devices to an LC port
connector of a Mini-GBIC (MGBIC-LC01) in front panel port 50 or 52, or
• a 1000BASE-LX single-mode fiber-optic segment from the network or other devices to an LC
port connector of a Mini-GBIC (MGBIC-LC09) in front panel port 50 or 52.
Each fiber-optic link consists of two fiber-optic strands within the cable:
• Transmit (TX)
• Receive (RX)
The transmit strand from a device port connects to the receive port of a fiber-optic Fast Ethernet
device at the other end of the segment. The receive strand of the applicable LC port connects to the
transmit port of the fiber-optic Fast Ethernet device.
WARNING: Mini-GBICs use Class 1 lasers. Do not use optical instruments to view the
laser output. The use of optical instruments to view laser output increases eye hazard.
When viewing the output optical port, power must be removed from the network adapter.