• Integrates a backward Raman unit and an EDFA unit and amplifies the input optical signals in C band. The total wavelengths range from 1529 nm to 1561 nm.
• Supports the system to transmit services over different fiber spans without electrical regeneration.
• Generates multi-channel pump light of high power, providing energy for the amplification of signals in the fiber.
• The TN12RAU2 board supports the interlock switch. The interlock switch of a LINE port on the panel controls the power-on and power-off of the board and prevents eyes from being injured by laser when an optical fiber is inserted into or removed from the LINE port.

Provides an in-service monitoring port (MON). This port connects to an optical spectrum analyzer or spectrum analyzer unit to monitor the spectrum and optical performance of the multiplexed signal without affecting traffic.

• Detects the pump driving current, back facet current, pump cooling current, temperature of the pump laser and the ambient temperature of the board.
• The EDFA optical module can detect and report optical power.
• The Raman amplifier optical module of the RAU2 board supports return loss detection.

The OTDR function can be used on the U2000. Monitoring figures and data are displayed on the U2000. For details, see the Fiber Doctor System in the Feature Description.

The Fiber Doctor Management System Software Fee License needs to be purchased for this function.

The FCD button and indicator are provided. You can press the FCD button on the front panel to trigger FCD. The detection process and results can be identified by the FCD indicator blinking frequency and indicator status. For details, see Front Panel.

When the Raman laser is turned on, the OTDR meter function is automatically enabled to detect fiber connections and therefore ensure that the laser is properly started, avoiding fiber burning due to inappropriate fiber connections.

If the Raman laser fails to be turned on, the line fiber quality monitoring function can be used to further identify fault points.

The quick shutdown of the Raman laser is supported. When fiber removal, fiber cut, or serious fiber bend occurs within 500 m around the site where the board housing the Raman laser is located, this function ensures that the pump light of the Raman laser is shut down within 100 ms. When a fiber removal or fiber cut occurs beyond 500 m around the site, the implementation of this function is related to the actual fiber line quality.