Appendix B Cable and Connector Specifications
Fiber-Optic Connectors
B-16
Catalyst 6500 Series Switch Module Installation Guide
78-15725-02
When you are connecting MT-RJ cables to a module, make sure you firmly press
the connector plug into the socket. The upper edge of the plug must snap into the
upper front edge of the socket. You may or may not hear an audible click. Gently
pull on the plug to confirm whether or not the plug is locked into the socket. To
disconnect the plug from the socket, press down on the raised portion on top of
the plug (releasing the latch). You should hear an audible click indicating that the
latch has released. Carefully pull the plug out of the socket.
Always make sure that you insert the connector completely into the socket. This
action is especially important when you are making a connection between a
module and a long distance (1.24 miles [2 kilometers]) or a suspected highly
attenuated network. If the link LED does not light, try removing the network cable
plug and reinserting it firmly into the module socket. It is possible that enough dirt
or skin oils have accumulated on the plug faceplate (around the optical-fiber
openings) to generate significant attenuation, reducing the optical power levels
below threshold levels so that a link cannot be made.
Caution Use extreme care when removing or installing connectors so that you do not
damage the connector housing or scratch the end-face surface of the fiber. Always
install protective covers on unused or disconnected components to prevent
contamination. Always clean fiber connectors before installing them.
For fiber-optic connector cleaning instructions, refer to the “Cleaning the
Fiber-Optic Connectors” section on page B-17.
When you disconnect the fiber-optic cable from the module, grip the body of the
connector. Do not grip the connector jacket-sleeve. Gripping the sleeve can, over
time, compromise the integrity of the fiber-optic cable termination in the MT-RJ
connector.
LC Connectors
Small Form-Factor Pluggable (SFP) tranceiver modules used on the Supervisor
Engine 720 uplink ports use either MT-RJ connectors or LC connectors
depending on the SFP vendor. Figure B-8 shows an LC connector.
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