GE DS2020BRCAG3 Overspeed Tachometer Module

Use a fiber optic tester to test the attenuation on the cable to determine if the strength of the fiber optic signal falls below acceptable limits. (For fiber optic port specifications for an AT-8000 Series Switch, refer to ”AT-8016F/xx, AT-8026FC, and AT8088/xx Fiber Optic Port Specifications” on page 93. For port specifications for a GBIC module, refer to the GBIC Installation Guide. For an optional fiber optic expansion module, refer to the Expansion Module Installation Guide.)

Check that the operating specifications 

(for instance, wavelength and maximum operating distance) of the fiber optic port on the remote end-node are compatible with the fiber optic port on the switch. For example, you cannot connect a fiber optic port with a maximum distance of 40 kilometers (24.8 miles) and an operating wavelength of 1550 nm to a remote fiber optic port with an maximum distance of only 2 kilometers (1.24 miles) and a wavelength of 1310 nm. ‰ Check to be sure that the fiber optic ports on the switch and on the end-node are operating at the same speed and duplex mode.

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