Ports of ITL boards

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Ports of ITL boards include the following:
TE (C_EVEN multiplexed signal)
RE (C_EVEN multiplexed signal)
TO (C_ODD multiplexed signal)
RO (C_ODD multiplexed signal)

Other related questions:
Functions of ITL board ports
Functions of ITL board ports: TE: C_EVEN multiplexed signal RE: C_EVEN multiplexed signal TO: C_ODD multiplexed signal RO: C_ODD multiplexed signal

Functions of the ITL board
The ITL board is an interleaver to multiplex and demultiplex odd and even wavelength signals.

Signal flows of the ITL boards on OSN 8800
An ITL board is used to multiplex and demultiplex the odd and even wavelengths. The wavelengths from the RO and RE ports are multiplexed into one wavelength and then sent out from the OUT port. The wavelength from the IN port is demultiplexed to two wavelengths and sent out from the TO and TE ports.

Signal flow on the ITL boards of OSN 8800 devices
The ITL board is used to multiplex and demultiplex odd and even wavelengths. The wavelengths from the RO and RE ports are multiplexed into one wavelength and then sent out through the OUT port. The wavelength from the IN port is demultiplexed as two wavelengths and sent out through the TO and TE ports separately.

Optical ports of an FIU board
An FIU board has a total of seven optical ports. The IN/OUT optical port is used to receive and transmit line optical signals. The RC/TC optical port is used to receive and transmit optical signals of the main optical channel. The RM/TM optical port is used to receive and transmit optical signals of the supervisory channel. The MON optical port is used to output optical signals to the spectrum analyzer board for online optical performance monitoring.

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