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            Huawei OSN 8800 Fixed Optical Add and Drop Multiplexing Boards TN11MR4 Overview
TN11MR4: 4-channel optical add/drop multiplexing unit
The available functional version of the MR4 board is TN11
As a type of optical add/drop multiplexing unit, the MR4 board adds/drops and multiplexes four channels of signals.
The MR4 board is mainly used to add/drop and multiplex signals, to query wavelengths, and to provide a cascading interface.
The MR4 board consists of the OADM optical module, control and communication module, and power supply module.
There are indicators, interfaces and a laser hazard level label on the front panel of the MR4 board.
One slot houses one MR4 board.
Function and Feature
| Function and Feature | Description | 
| Basic function | Adds/drops and multiplexes four consecutive channels of signals to/from the multiplexed signals. | 
| WDM specification | Supports the DWDM specifications. | 
| Cascading interface | Provides the interface to cascade another optical add and drop multiplexing board to achieve expansion. | 
| Wavelength query | Queries the wavelengths for the added or dropped signals. | 
| Optical-layer ASON | Not supported | 



 
					
				 
					
				 
					 
 
 
             
  
  
              
 
 
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