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.
| | | Input Power Monitor | |
| | | | | |
| | Operational | Accurate | | |
| Model # | Monitoring | Trap Thresholds | Failure Reading |
| Range |
| | Range | | |
| | | | |
| | | | | |
| RA21-14 | -29 to -7dBm | -28 to -12dBm | -28dBm and -7dBm | -31dBm |
| RA21-16 |
| | | | |
| | | | | |
| RA21-17 | -34 to -7dBm | -31 to-12dBm | -31dBm and -7dBm | -40dBm |
| RA21-1J |
| | | | |
| | | | | |
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.
Output Power Monitor
| Model # | Operational | Typical | Trap Thresholds | Failure Reading |
| Range | Reading |
| | | |
| | | | | |
| RA21-14 | -15 to -8dBm | -11dBm | -15dBm and -7dBm | -18dBm or -3dBm |
| RA21-16 |
| | | | |
| | | | | |
| RA21-17 | -5 to 0dBm | -3dBm | -6dBm and 0dBm | -9dBm or +3dBm |
| RA21-1J |
| | | | |
| | | | | |
*Refer to the Command Line Interface Reference Guide, NetBeacon Element Management Software Installation & 16User Guide or WebBeacon Management Software Installation & User Guide for software management information.
16 User Guide