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FAQ-Differences Between the Optical Cross-Connection for an NE and Optical Cross-Connection for a Board

Publication Date:  2012-07-25 Views:  49 Downloads:  0
Issue Description
Q:
What are the differences between the optical cross-connection for an NE and optical cross-connection for a board? 
 
Alarm Information
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Handling Process
A:
The T2000 V200R004GA provides the following two modes of configuring the optical cross-connection for the NG-WDM equipment.
1. The optical cross-connection for an NE is configured after the edge port, OTU wavelength attributes, and T2000 fiber connection are correctly configured. (Note: The wavelength information must be configured regardless of whether the OTU is a wavelength tunable OTU. Otherwise, the wavelength cannot be selected when the optical cross-connection is configured.)
2. The optical cross-connection for a board is for the WSD9 and ROAM. In the case of the optical cross-connection for a board, the edge port and T2000 fiber connection do not need to be configured.
Differences:
The optical cross-connection for an NE and optical cross-connection for a board cannot be on the same wavelength because of resource preemption.
1. If the optical cross-connection for an NE is configured and then the optical cross-connection for a board is configured, the wavelength is automatically invisible. If the optical cross-connection for a board is configured and then the optical cross-connection for an NE is configured, an error message indicating that the connected route is unavialable is returned.
2. The optical cross-connection for a board is applicable to the scenario where the output wavelength of the WSD9/ROAM is connected to the colored optical interface of the SDH equipment or OptiX OSN 900A equipment.
3. The optical cross-connection for an NE is applicable to all the scenarios. In the case of the colored optical interface, however, the DM port of the WSD9 should be selected as the edge port.
4. When configuring the optical cross-connection for an NE, you can select the automatic mode or manual mode. In the automatic mode, the attenuation rate cannot be manually adjusted. The attenuation rate can be automatically adjusted, however, if the optical power of the upstream signal (OAU1, FIU) changes. This is similar to the ALC function based on the wavelength.
5. The conversion between the optical cross-connect service for an NE and optical cross-connect service for a board interrupts the service. 
 
Root Cause
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Suggestions

You should configure the optical cross-connection according to the engineering design diagram. If no related requirements are specified, the optical cross-connection for a board is recommended. 

END