Hello there, Community!
This post is about IPA - configuration principles for various scenarios. Please have a look below for more details.
BACKGROUND INFORMATION
The IPA function provided by the OptiX OSN 6800 of version V100R004C04 and the OptiX OSN 8800 of version V100R002 and their later versions has the following changes:
after the alarm detection threshold is set for OA boards, the alarm detection threshold does not change until all the IPA parameters are deleted;
the ALS function is available for the CRPC boards. The laser on a CRPC board is automatically shut down when the following condition is met: The alarm threshold of the CRPC board is not 0x7fffffff and the current input optical power is lower than the alarm threshold.
BASIC SCENARIO
To implement the IPA function on a point-to-point link where no CRPC board is configured, set one OA board as the detection board and another OA board as the control implementation board, and set the corresponding parameters. No auxiliary detection board is required.
OADM STATIONS
If an OADM station exists on a line and no CRPC board exist in the system, the IPA pairs must be configured station by station along the line.
OLA STATIONS
When IPA pairs are configured station by station, only the OSC board can be set as an auxiliary detection board. If an OTU or a CRPC board is set as an auxiliary detection board, the upstream and downstream IPA functions may be affected.
When IPA pairs are configured at only two ends on a line (an OTM or OADM station exists between two OLA stations), an auxiliary detection board is optional. The values of On Period (0.01s) set for the IPA pairs at the two ends must be the same.
SYSTEM USING CRPC BOARDS
Such a system is complex and must be configured with auxiliary detection boards.
The alarm threshold must be set for OA boards. For details on how to set the threshold, see the description of the Detection Board Threshold (dBm) parameter in section 2.1 'Parameter Description'.
The OSC board must be set as an auxiliary detection board. You can choose whether to set the OTU and CRPC boards as auxiliary detection boards. It is recommended to set both the OSC and OTU boards as auxiliary detection boards.
If no OSC board is configured in the system, check whether the CRPC board can be set as an auxiliary detection board. For details, see the description of the Raman Board Threshold (dBm) parameter in section 2.1 'Parameter Description'.
If the OSC and CRPC boards cannot be set as auxiliary detection boards, set the OTU board as an auxiliary detection board. Ensure that no R_LOS, R_LOF, or R_LOC alarm is reported on the OTU board when the laser on the upstream OA board is started and the laser on the local CRPC board is shut down. If the OTU board reports the R_LOS, R_LOF, or R_LOC alarm in such a scenario, the OTU board cannot be set as an auxiliary detection board.
