Whether the optical supervisory channel (OSC) mode and the electrical supervisory channel (ESC) mode of OSN 8800 devices can be used together

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You are not advised to use the OSC and ESC modes together. You can disable the ESC mode through the GCC0 channel on an optical board.

Other related questions:
Optical supervisory wavelength for the SCC board on OSN 1800
The 1310 nm wavelength can be used by the OSC port of an SCC board on OSN 1800.

Optical supervisory wavelength used by an SCC board on OSN 1800
Generally, 1310 nm wavelength is used.

Whether OptiX OSN 6800 can provide a power supervisory channel (RS232)
No. OptiX OSN 6800 does not provide RS232 alarm inputs.

Whether an optical module whose wavelength is 1511 nm can be configured on the TM/RM port of the SCC board on an OSN 1800
The SCC board on an OSN 1800 needs to use an optical module whose wavelength is 1310 nm.

Principles of choosing supervisory channels of NG WDM devices
Question: Almost all OTU boards on NG WDM devices support ESC, but SC2 boards are also configured on live networks to support OSC. When both supervisory methods are available, certain principles to choose which to use should be followed. Root cause: None Answer. If both OSC and ESC are available between two NEs, the priority of DCC channels in use are as follows: 1. GCC12_1; GCC12_9; D4-D12; D1-D3; pilot-tone DCC2. 2. If the available DCC channels have the same bandwidth, follow the sequential orders that DCC channels were identified by the NE instead of the DCC channel ID in ascending order. Generally, this is related to the order of the boards going online, namely, the NE preferentially choose the DCC channel of the board that goes online first to deliver monitoring messages. Note: Some OTU boards such as L4G can also use D1 to D3 channels by modifying the service type to SDH at the WDM side. Suggestion and conclusion: The priority of ESC monitoring channels of NG WDM is higher than OSC. When both OSC and ESC are available, the supervisory messages are preferentially delivered through ESC.

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