PID

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The photonics integrated device (PID) feature integrates conventional optical conversion units and MUX/DEMUX units into a PID board. It achieves high integration.

Other related questions:
Differences between a network with PID networking using OA boards and a common network
For common networking without PID boards, connecting the built-in VOAs on OA boards is not mandatory. For PID board networking, however, the built-in VOAs on OA boards must be connected because PID boards are commissioning-free and the VOAs need to be automatically adjusted to ensure that the output optical power satisfies requirements.

Whether the RI port sensitivity of the PID board can be queried
The module of the RI port on the PID board is a passive red/blue band filter. The RI port is only a logical optical port connected to an optical fiber. The receive wavelengths (12+8) on the RI port are processed by the red/blue band filter, and then arrive on the 12 independent physical optical ports of a blue-band PID board and the 8 independent physical optical ports of a red-band PID board. TO/RI, T01/R01, and T02/R02 ports are only logical optical ports for fiber connections. For logical optical ports, the sensitivity indicator is unnecessary. Therefore, the transmit/receive optical power reported by such boards are only logically calculated values.

PID
The photonics integrated device (PID) feature integrates conventional optical conversion units and MUX/DEMUX units into a PID board. It achieves high integration.

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