Difference between the LINE1 and LINE2 ports of the SFIU board

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The LINE1 port of the SFIU board transmits main optical path signals as well as OSC signals, but the LINE2 port transmits only main optical path signals.

Other related questions:
Light emitting of the LINE1 port of the SFIU board on OSN 9600
The LINE1 port is the public channel for service light and monitoring light. The reverse light of the monitoring light also traverses this port. Therefore, the LINE 1 port emits light at the receive end.

Light at the LINE1 port of the OSN 9600
The LINE1 port is the public channel for service light and monitoring light, and the reverse light of the monitoring light also traverses this port. Therefore, the LINE 1 port emits light at the receive end.

Difference between the function of the NM_ETH port and that of the ETH port on the TN11AUX board
1. The TN11AUX board uses the NM_ETH port to connect to the NMS server so that the NE where the board resides functions as a gateway NE, or uses this port to connect to another device to implement extended ECC communication. 2. The ETH port of the TN11AUX board can be used only to cascade subracks on the same NE.

Functions of the SFIU board
The SFIU board is an optical multiplexing and demultiplexing unit. It multiplexes and demultiplexes signals transmitted over the main optical channel and OSC, avoiding commissioning and compensation for IEEE 1588v2 signals.

Difference between the IN/OUT ports and TX/RX ports on an OTU board
The IN/OUT port of an OTU board is the WDM-side port for connecting to a MUX/DEMUX board, while the TX/RX port is the client-side port for connecting to access equipment.

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