 
            TNFASL64S Is Huawei OptiX OSN 1800 SDH Optical Interface Board
 
            Huawei OptiX OSN 1800 SDH Optical Interface Board TNFASL64S Overview
TNFASL64S: 1*STM-64 optical interface board
The TNFASL64S can be used to receive and transmit two STM-64 optical signals.
The TNFASL64S consists of an O/E conversion unit, an overhead processing unit, a logic control unit, and a clock unit.
The TNFASL64S Receives/Transmits 4 x STM-16 optical signals.
Functions and Features of the TNFASL64S Board
| Function and Feature | Description | 
| Basic function | Receives/Transmits 1 x STM-64 optical signals. | 
| Service processing | VC-12, VC-3, VC-4, VC-4-4c, VC-4-16c, VC-4-64c | 
| Overhead processing | 
 | 
| Port specifications | 
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| SDH SNCP | Supported | 
| Linear MSP | Supported | 
| Ring MSP | 
 | 
| SDH ASON | Supported | 
| Pointer processing | Processes AU pointers. | 
| Overtemperature protection | Supported. If the temperature of a board exceeds the upper threshold and services are affected, the board will automatically reset the key chips to prevent a board damage. | 
| ALS | Supported (comply with ITU-T G.664). | 
| Line clock source | Supports two channels of SDH line clock signals. | 
| Outband DCN | Supported NOTE: For details about the DCN types supported by the board, see "Feature Description - Outband DCN - Introduction to DCN - DCN Communication Channel - Comparison Between OSC and ESC". | 
| PRBS | Supported | 
| Bit Error Threshold-Crossing/Degradation Threshold Setting | Supported | 
| Reset | Supports warm reset and cold reset, the warm reset does not affect services. | 
| Manufacturer information querying | Supported | 
| In-service FPGA loading | Supported | 
| Hot swapping | Supported | 
| Channel loopback | 
 | 
| Port loopback | Inloops, outloops | 
| 2M ASON | Supported | 
| Alarm and performance event monitoring | Provides various alarms and performance events, facilitating equipment management and maintenance. | 


