Configuring APS for 10G ITU w/ Splitter

Question

Does anyone have experience on configuring APS for 10G ITU card with Splitter so that in a case of signal degrade it will switchover to the protection path? The default switchover mechanism is based on LOL (Loss-Of-Light) but it wont help if signal degrades for example to -25dB. All experiences and best practices are wellcome.

Answer 1

I know the protection schemes (client, splitter, Y-cable etc.) but my question is how to configure splitter protection so that in a case of signal degrease it will do switchover to the protection path.
See below an output from ONS15530:
ONS15530_1>sh aps
AR : APS Role, Wk: Working, Pr: Protection
AS : APS State, Ac: Active, St: Standby, NA: Not Applicable
IS : Interface State, Up: Up, Dn: Down
MPL: Minimum Protection Level, SD: Signal Degrade, SF: Signal Failure
LOX: Loss of Light/Loss of (CDR) Lock/Loss of Frame/Sync,
LOL: Loss of Light, - not currently protected
Interface AR AS IS MPL Redundant Intf Group Name
~~~~~~~~~~~~~~~~~~~~~ ~~ ~~ ~~ ~~~ ~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
Wavepatch1/0/0 Wk Ac Up LOX Wavepatch1/0/1 CH1
Wavepatch1/0/1 Pr St Up - Wavepatch1/0/0 CH1
So APS will switch to the protection path only in a case of Loss of Light/Loss of (CDR) Lock/Loss of Frame/Sync. So it WONT do the failover if RX signal level degreases below the minimum RX level (-23dB for 10G ITU card), because there is still light coming (not LOL case). So how do I protect my system against this kind of signal degreade?
rgds,
Jp