Cisco 7604 Processor Guide - Page 90

Fiber-Optic Connectors Appendix B Cable and Connector Specifications Fiber-Optic Connectors This section describes the SC, MT-RJ, and LC fiber-optic connectors and provides instructions for cleaning the fiber-optics connectors. It contains the following sections: • SC Connectors, page B-16 • MT-RJ Connectors, page B-17 • LC Connectors, page B-17 • Cleaning the Fiber-Optic Connectors, page B-18 SC Connectors Warning Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments. Statement 1051 The SC single-mode fiber connector is used to connect fiber-optic module ports with the external network. (See Figure B-5.) Figure B-5 SC Optical Connector \ 247372 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 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. 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, see the "Cleaning the Fiber-Optic Connectors" section on page B-18. B-16 Cisco 7600 Series Router Supervisor Engine and Route Switch Processor Guide OL-10100-11