Method used to handle low transmit optical power

22

Possible cause 1: Any fiber pigtail in a multiplexing part or the optical cable degrades or is physically damaged. As a result, the attenuation of the fiber increases, and the receive optical power decline causes an OSNR decrease. Possible cause 2: The OA board gain at the local or peer site is decreased.
For possible cause 1:
a. Check the pigtail of the multiplexing part, and replace the pigtail if it is abnormal.
b. Verify that the optical cable is normal.
Note:
A pigtail in a multiplexing part is one between the following units:
Equipment and ODF
OA and FIU
OA and MUX/DEMUX
ODFs
TDC and RDC of an OAU board
For possible cause 2:
Check the OA board gain. If the gain is abnormal, replace the board.

Other related questions:
Method used to check whether the transmit optical power of a TOG board is fixed
You can query for a change in the transmit optical power of the TOG board on the NMS and determine whether the transmit optical power is fixed based on the query results.

Method used to handle the optical power at the wavelength dropping point in OptiX OSN 8800 being too low and closed to the threshold
The problem can be resolved by decreasing the attenuation of the VOA connected to the OBU at the upstream site. However, the wavelength unflatness caused by line insertion loss and wavelength expansion persists and requires future optimization.

The state of an optical interface is not Up when it interconnects with the peer device
For the problem that the state of an optical interface is not Up when it interconnects with the peer device, see the troubleshooting guide. For details, access the URL in the right column.

Method used to query optical power
In the NE Explorer, select the desired board. Choose Configuration > Optical Power Management from the navigation tree.

Why is the optical module transmit power obtained using the MIB different from the transmit power displayed by the display command
The transmit power value displayed by the display command is expressed in the unit of dBm, whereas the transmit power value displayed by the MIB is expressed in the unit of 10 uW. The relationship between the two units is: dbm = 10 x lg(mW).

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top