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16 User Guide

Singlemode Fiber Optic Power Monitors

Through software

, you can read the input and output power levels of the

singlemode fiber optic port on the Access ONU.

Input Power Level

The accuracy of the input power monitor is ±1dBm from -28dBm to -12dBm.

The accuracy is ±2dBm from -31dBm to -29dBm. The monitor is unresponsive

below -31dBm. If there are no cables connected to the fiber port, the software

may display a reading of -40dBm. The Access ONU peaks at -12dBm and

reaches saturation at -7dBm.

The singlemode long haul (RA21-17) and extended long haul (RA21-1J) ports

are operational down to -34dBm, which is too low for the monitor to measure. If

the input power level is between -34dBm and -29dBm, a valid link will be

established, however, the light level displayed by the software will show a

reading of -40dBm. This reading is not a failure indication; it simply means the

level is beyond the range of the power monitor.

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Output Power Level

The accuracy of the output power monitor is ±3dBm. Failure readings indicate

that the unit is non-functional and must be replaced. If there are no cables

connected to the fiber port, the software may display readings that indicate

failure.

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* Refer to the

Command Line Interface Reference Guide

NetBeacon Element Management Software Installation &

16User Guide

WebBeacon Management Software Installation & User Guide

for software management

information.