Cisco WS-SUP720-3B - Supervisor Engine 720 User Manual page 91

Appendix B Cable and Connector Specifications
MT-RJ Connectors
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
Warning
beams or view directly with optical instruments. Statement 1051
The MT-RJ style connector is used on fiber-optic modules to increase port density. (See
Figure B-6
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.
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 on the supervisor engine or route switch
processor 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.
Use extreme care when removing or installing connectors so that you do not damage the connector
Caution
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, see the
on page
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
The small form-factor pluggable (SFP) tranceiver modules used on the Supervisor Engine 720, Route
Switch Processor 720, and RSP720-10GE uplink ports use either MT-RJ connectors or LC connectors
depending on the SFP module vendor.
OL-10100-11
MT-RJ Optical Connector
B-18.
Cisco 7600 Series Router Supervisor Engine and Route Switch Processor Guide
"Cleaning the Fiber-Optic Connectors" section
Figure B-7 shows an LC connector.
Fiber-Optic Connectors
Figure B-6.)
B-17