Is there a ratio requirement for MRS and DTU boards on U1980

For TN11FIU, TN12FIU, TN13FIU01, TN14FIU, and TN21FIU boards, the split ratio between the MON port and OUT port is 1:99. In other words, the optical power of the MON port is 20 dB lower than that of the OUT port, which can be calculated using the following formula: Optical power (dBm) of the OUT port �?Optical power (dBm) of the MON port = 10 x lg(99/1) = 20 dB. For the TN13FIU02 board, the split ratio between the MON port and OUT port is 0.1:99.9. In other words, the optical power of the MON port is 30 dB lower than that of the OUT port, which can be calculated using the following formula: Optical power (dBm) of the OUT port �?Optical power (dBm) of the MON port = 10 x lg(99.9/0.1) = 30 dB.

No.

1. Check whether the network segment of the MRS board is 168.168.0.10. 2. Run the show inner network command on the main control board to query the network segment of the board. 3. If the network segment of the MRS board is inconsistent with the internal network segment of the main control board, run the config inner network ip XXXX command to change the network segment of the MRS board to 168***, and then restart the U1900.

On the LMT client, run the show inner networkip command.

1. Delete the board and then add the board again. 2. Remove the board. After reinstalling the board, check the board status. 3. Reload the boot version in boot2 mode.