Enterasys c1g124-24 Benutzerhandbuch

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 “

” in About This Guide. 

If a link has not been established, refer to 

 for LED troubleshooting details. If a 

problem persists, refer to 

 for details on contacting Enterasys Networks for support.

5. Repeat steps 1 through 3, above, until all connections have been made.

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.