 
            TN54NS4M Is 100G line service processing board
 
            NS4M: 100G line service processing board
The available functional versions of the NS4M board is TN54.
As a type of line board, the NS4M board converts 80 ODU0, 40 ODU1, ten ODU2, ten ODU2e, two ODU3, one ODU4, or 80 ODUflex into one ITU-T G.694.1 OTU4 signal. The board supports hybrid transmission of the ODU0 service, ODU1 service, ODU2/ODU2e service, ODU3 service and the ODUflex service. The NS4M board uses four wavelengths to transmit one channel of OTU4 signals in the short-haul IDC interconnection scenario.
The NS4M board achieves cross-connection at the electrical layer, and to provide OTN interfaces and ESC.
The NS4M board consists of the WDM-side optical module, OTN processing module, control and communication module, and power supply module.
Two slots house one NS4M board.
Function and Feature
| Function and feature | Description | |||||
| Basic function | The NS4M board converts signals into one channel of OTU4 signals (shown in the following sequence) and then four channels of ITU-T G.694.1-compliant wavelength signals. 80xODU0/80xODUflex/40xODU1/10xODU2/10xODU2e/2xODU3/1xODU4<->1xOTU4 Supports mixed transmission of ODU0, ODU1, ODUflex, ODU2, ODU2e, and ODU3 signals. | |||||
| Cross-connect capabilities | Supports the cross-connection of 80 channels of ODU0/ODUflex signals or 40 channels of ODU1 signals or ten channels of ODU2/ODU2e signals or two channels of ODU3 signals or one channel of ODU4 signals between the NS4M and the cross-connect board. | |||||
| OTN function | 
 | |||||
| WDM specification | Supports DWDM specifications. | |||||
| Tunable wavelength function | Not supported | |||||
| ESC function | Supported | |||||
| PRBS function | Supports the PRBS function on the WDM side. | |||||
| LPT function | Not supported | |||||
| FEC coding | Supports HFEC on the WDM side. | |||||
| Alarms and performance events monitoring | 
 | |||||
| ALS function | Not supported | |||||
| Latency measurement | Supported | |||||
| Test frame | Not supported | |||||
| Optical-layer ASON | Not supported | |||||
| Electrical-layer ASON | Supported | |||||
| Protection scheme | 
 NOTE: When the cross-connect granularity is ODUflex, the board does not support tributary SNCP protection. | |||||
| Loopback | WDM side Loopback | ODU0 Channel Loopback | ODU1 Channel Loopback | ODU2 Channel Loopback | ODU3 Channel Loopback | ODUflex Channel Loopback | 
| Supported | Supported | Supported | Supported | Supported | Supported | |


