Functions and Features

The NS3 board achieves cross-connection at the electrical layer, and to provide OTN interfaces and ESC. The TN56NS3 board supports hybrid transmission of OTN and SDH services.

The NS3 board can work in either line mode or relay mode. Table 1 describes the functions and features of the board working in line board, and Table 2 describes the functions and features of the board working in relay board.

 NOTE:

• 
  

  Only the OptiX OSN 8800 supports ODU0/ODU3.

  
  


• 
  

  The relay mode is only supported by the TN54NS3/TN55NS3/TN56NS3.

  
  


• For the TN54NS3 board:
  
  
  
  • When the board is equipped with 40 Gbit/s-multirate-2km optical modules, it does not support OTU3e on the WDM side and ODU2e on the backplane side.
  
  
  • When the board is equipped with 800ps/nm-C band-tunable-ODB-PIN or 800ps/nm-C band-tunable-DQPSK-PIN optical modules, the preceding restriction does not apply.
  
  
  
  


• Only the TN56NS3 board supports SDH functions and features, including SDH overhead, physical clock (OCS), Electrical-layer ASON (SDH), SDH protection, and VC-4 channel loopback.

Table 1 Functions and features of the NS3 board (Line Mode)

Function and feature	Description
Basic function	NS3 converts signals as follows: TN11NS3: 4xODU2<->1xOTU3/OTU3e 4xODU2e<->1xOTU3e TN52NS3: 32xODU0/16xODU1/4xODU2<->1xOTU3/OTU3e 4xODU2e<->1xOTU3e TN54NS3/TN55NS3: 32xODU0/16xODU1/4xODU2<->1xOTU3/OTU3e 4xODU2e<->1xOTU3e 1xODU3<->1xOTU3 TN56NS3: 32xODU0/32xODUflex/16xODU1/4xODU2<->1xOTU3/OTU3e 4xODU2e<->1xOTU3e 1xODU3<->1xOTU3 16xSTM-16/4xSTM-64<->1xOTU3/OTU3e The TN52NS3/TN54NS3/TN55NS3 board supports hybrid transmission of ODU0/ODU1/ODU2/ODU2e signals. The TN56NS3 board supports hybrid transmission of ODU0/ODU1/ODU2/ODU2e/ODUflex/VC-4 signals. When the mixed signals contain an ODU2e signal, they must be mapped into an OTU3e signal. The TN11NS3/TN52NS3/TN54NS3 board supports dispersion compensation for signals received on the WDM side.
Cross-connect capabilities	Supports cross-connections with cross-connect boards. OptiX OSN 8800: TN52NS3: 32xODU0/16xODU1/4xODU2/4xODU2e TN54NS3/TN55NS3: 32xODU0/16xODU1/4xODU2/4xODU2e/1xODU3 TN56NS3: 32xODU0/32xODUflex/16xODU1/4xODU2/4xODU2e/1xODU3/256xVC-4 NOTE: When the TN56NS3 board is installed in an OptiX OSN 8800 T64 subrack, the board supports a maximum of 128 VC-4 services. This limit does not apply when the board is installed in an OptiX OSN 8800 T32/T16 subrack. OptiX OSN 6800: TN11NS3: 4xODU2/4xODU2e TN52NS3: 16xODU1/4xODU2/4xODU2e
OTN function	Supports the OTU3/OTU3e interface on the WDM side. Supports the OTN frame format and overhead processing by referring to the ITU-T G.709. OTU3 layer: supports the SM function. ODUk (k=0, 1, 2, 3, flex) layer: supports the PM and TCM function, and PM and TCM non-intrusive monitoring functions. NOTE: Only the TN56NS3 board supports TCM and TCM non-intrusive monitoring of the ODU0 and ODUflex layer.
SDH service processing	Supports the VC-12 services, VC-3 services, VC-4 services, VC-4-4c concatenation services, VC-4-16c concatenation services, and VC-4-64c concatenation services.
SDH overhead processing	Only the TN56NS3 board supports the following functions: Processes the section overheads of STM-16/STM-64 signals. Supports the transparent transmission and termination of path overheads. Supports the setting and query of the J0, J1, and C2 bytes. NOTE: The TN56NS3 board supports D4–D12 overhead processing. It does not support D1–D3 overhead processing.
WDM specification	Supports ITU-T G.694.1-compliant DWDM specifications.
Tunable wavelength function	Supports tunable wavelength optical modules that provide for: 40 wavelengths tunable in the C band with 100 GHz channel spacing 80 wavelengths tunable in the C band with 50 GHz channel spacing
ESC function	Supported
PRBS test function	TN52NS3/TN54NS3/TN55NS3/TN56NS3 supports the PRBS function on the WDM side.
LPT function	Not supported
FEC coding	TN11NS3/TN52NS3: Supports ITU-T G.709-compliant forward error correction (FEC) on the WDM side. Supports ITU-T G.975.1-compliant advanced forward error correction (AFEC) on the WDM side. TN54NS3: Supports ITU-T G.709-compliant forward error correction (FEC) on the WDM side. Supports ITU-T G.975.1-compliant AFEC-2 on the WDM side. TN55NS3/TN56NS3: Supports HFEC. NOTE: Boards that use different FEC modes cannot interconnect with each other.
Alarms and performance events monitoring	Monitors BIP8 bytes (Poisson mode or Bursty mode) to help locate line failures. Monitors parameters such as the bias current, temperature, and optical power of the laser. Monitors OTN alarms and performance events. Supports CD and PMD performance monitoring. Monitors B1 bytes to help locate faults. Monitors B2 bytes to help locate faults. NOTE: Only the TN54NS3 supports Poisson mode. Only the TN55NS3/TN56NS3 board supports CD and PMD performance monitoring. Only the TN56NS3 board supports B1/B2 byte monitoring.
Regeneration board	The WDM-side signals of the TN11NS3/TN52NS3 board can be regenerated by a TN12LSXLR board. The WDM-side signals of the TN54NS3 board can be regenerated using another TN54NS3 board. The WDM-side signals of the TN55NS3/TN56NS3 board can be regenerated using another TN55NS3/TN56NS3 board.
ALS function	Not supported
Latency measurement	TN11NS3: Not supported TN52NS3/TN54NS3/TN55NS3: Supports the PM Latency measurement. TN56NS3: Supports the PM and TCM Latency measurement.
MSI configuration	Only supported by the TN56NS3 board.
Test frame	Not supported
IEEE 1588v2	The TN54NS3 board supports BC and OC mode, do not support TC and TC+OC mode.
Physical clock (OTN)	The TN54NS3 board supports this feature only when ODU0, ODU1 or ODU2/ODU2e signals are cross-connected from the backplane.
Optical-layer ASON	Supported
Electrical-layer ASON (OTN)	Supported by the TN52NS3, TN54NS3, TN55NS3, and TN56NS3.
Electrical-layer ASON (SDH)	Supported only by the TN56NS3 board. NOTE: When being installed in a T16 subrack, the board does not support SDH ASON.
Protection scheme	OTN protection Supports ODUk SNCP. Supports intra-board 1+1 protection (when working with the OLP/DCP/QCP board). Supports ODUk SPRing protection. Supports tributary SNCP protection. Supports OWSP protection. SDH protection SNCP SNCTP LMSP MSP ring NOTE: Only TN52NS3 supports OWSP protection. When the grooming granularity is ODUflex, ODUk SPRing and tributary SNCP protection types are not supported.
Loopback	Board	WDM side	ODU0/ODU1/ODU2 Channel Loopback	ODUflex Channel Loopback	VC-4 Channel Loopback
	TN11NS3	Supported	ODU0/ODU1: NA ODU2: Supported	N/A	N/A
	TN52NS3	Supported	Supported	N/A	N/A
	TN54NS3	Supported	Supported	N/A	N/A
	TN55NS3	Supported	Supported	N/A	N/A
	TN56NS3	Supported	Supported	Supported	Supported

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