Whether the TQX board supports ALS

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Yes, the TQX board supports ALS. After ALS is enabled, when a fault occurs on the client or WDM side, the laser on the optical port in the corresponding transmit direction will be turned off. The laser will be recovered after signals in the receive direction are restored to normal. With the ALS function enabled, fault information can be sent to notify client equipment of the link status. By default, ALS is enabled on boards.

Other related questions:
Whether a TQX board mapping FC800 into ODU2 can be interconnected with another TQX board mapping FC800 into ODUflex
No, they cannot. This is because they have different mapping paths.

Failure to support the ALS function by RPC
Question: Why RPC does not support the ALS function? Analysis: To support the ALS function, RPC must be able to accurately detect fiber cuts. Theoretically, there are two methods of detecting fiber cuts: 1. Check optical power. If the RPC receive optical power is less than a certain value, a fiber cut occurs. 2. Check the reflection value. If the RPC receive reflection power is greater than a certain value, a fiber cut occurs. The RPC receive optical power is dependent on the number of wavelengths, line attenuation, and RPC gain. If a fiber cut point is far from the RPC, the pump light in optical cables can be greatly amplified. In this case, the RPC receive optical power contains large noise power. For the reasons above, the difficulty in determining a fiber cut based on the power strength lies in that a critical power value for judging a fiber cut cannot be determined. To be specific, it is unreliable to determine an RPC fiber cut based on the power strength. The reflection value is dependent on the end face of the fiber cut point. There are two types of fiber cuts: a. A connector is disconnected. If a PC connector is disconnected from an optical port, large reflection power is generated. A fiber cut can be determined based on the reflection power. However, the LINE port of the RPC board is equipped with an APC connector that is applicable to high-power applications. Small reflection power is generated even though the APC connector is disconnected. Therefore, the reflection power cannot be used as the basis of a fiber cut. b. An optical cable is broken. The reflection power generated upon a cable break is random and is small in most cases. Therefore, the reflection power cannot be used as the basis of a fiber cut. Based on the preceding reasons, it is unreliable to implement the ALS function only using the RPC board. Answer: Use the IPA function to disable the laser of the RPC board upon a fiber cut. Suggestion and conclusion: None

Precautions for provisioning 10GE services on the TQX board
Appropriately select service types and line board service modes.

Whether NS3 board resources can be shared between STM-64 and 10GE LAN services on the TQX and NS3 boards
Yes. The STM-64 and 10GE LAN services provisioned on the TQX and NS3 boards of OTN equipment can share the same resources of the NS3 board. The ODU3 services need to be in speedup mode and ODU2 service mode need to be set according to the actual service type.

Specifications of the client-side optical modules of TQX boards on the OSN 8800
For 10 Gbit/s multirate 40 km client-side optical modules intended for TQX boards, the maximum and minimum transmit optical power values are 2 dBm and �?.7 dBm respectively, and the receiver sensitivity (multirate) is �?4 dBm. For 10 Gbit/s multirate 80 km client-side optical modules intended for TQX boards, the maximum and minimum transmit optical power values are 4 dBm and 0 dBm respectively, and the receiver sensitivity (multirate) is �?4 dBm.

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