 
            TNF1SL1Q Is Huawei OptiX OSN 1800 SDH Optical Interface Board TNF1SL1Q
 
            Huawei OptiX OSN 1800 SDH Optical Interface Board TNF1SL1Q Overview
TNF1SL1Q: 4 x STM-1 optical interface board
The TNF1SL1Q is a TDM board, which can be used on the OSN equipment to receive and transmit four STM-1 optical signals. The SL1Q converts the received optical signals into electrical signals and sends the electrical signals to the cross-connect side. In addition, the SL1Q converts the electrical signals from the cross-connect side into optical signals and transmits the optical signals.
The TNF1SL1Q consists of the O/E conversion unit, overhead processing unit, logic control unit, and clock unit.
The TNF1SL1Q Receives/Transmits 4 x STM-1 optical/electrical signals.
Functions and Features of the TNF1SL1Q Board
| Function and Feature | Description | 
| Basic function | Receives/Transmits 4 x STM-1 optical/electrical signals. | 
| Service processing | VC-12, VC-3, VC-4 | 
| Overhead processing | 
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| Port specifications | 
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| SDH SNCP | Supported | 
| Linear MSP | Supported | 
| Ring MSP | Not supported | 
| TPS | Not supported | 
| SDH ASON | Supported NOTE: Only supported when the TNZ6UXCMS/TNZ5UXCMS/TNZ5XCS board is used. | 
| Pointer processing | Processes AU pointers. | 
| ALS | Supported | 
| SSM enable status control at a line optical port | Supported | 
| Physical clock | Supports SDH clock synchronization. | 
| 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". | 
| 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 | 
| One-click data collection | Not supported | 
| Channel loopback | Inloops on VC-4 paths, outloops on VC-4 paths | 
| Port loopback | Inloops, outloops | 
| 2M ASON | Supported NOTE: Only supported when the TNZ6UXCMS/TNZ5UXCMS/TNZ5XCS board is used. | 


