To ensure that the transmission equipment can be normally running for long, you need to periodically maintain the transmission equipment or perform some simple operations of troubleshooting on existing problems.
Common Maintenance Operations
This topic provides a full view of common WDM NE maintenance operations and describes related functions and scenarios.
Querying Optical Power of a Board
The optical power of a signal changes after it is transmitted. This change affects intensity and sensitivity of the signal. If the optical power is too high or too low, damage to optical components or bit errors may be caused, affecting the service. Querying optical power is a common maintenance method.
Converting Between SNCP and non-protection WDM Services
During network expansion or handover, you may need to change the type of a protection or the protection type of services. This function is used for quick conversion between SNCP services and non-protection services.
Converting Between SNCP and Non-Protection SDH Services
During network expansion or handover, you may need to change the type of a protection or the protection type of services. This function is used for quick conversion between SNCP services and non-protection services.
Resetting a Board
You can reset a board by using the Web LCT. Resetting a board is a maintenance method used in the case of an improper board working status.
Disabling Service-Affecting Settings Automatically Loopback and laser shutdown are useful NE maintenance functions. Performing these functions may interrupt services at the port and may also interrupt the communication between the NE and the Web LCT. Hence, you can set automatic disabling before performing loopback or laser shutdown so that the NE automatically cancels the loopback or laser shutdown.
Performing a Loopback
The loopback is a common and effective way to locate equipment faults. By using the Web LCT you can set a loopback for equipment.
Setting Dispersion Compensation Parameters
In a 40G system, you must accurately configure the fixed dispersion compensator. You also need to use the tunable dispersion compensator (TDC) to adjust dispersion precisely. In addition, you need to use TDC dispersion real-time adjustment to rectify dispersion offsets of transmission fibers caused by changes in factors such as ambient temperature.