Introduction of 100G Line Board NS4 Board Mode

NS4 is OTN 100G line board, it converts 80xODU0, 40xODU1, 10xODU2, 10xODU2e, 2xODU3, 1xODU4, or 80xODUflex into one ITU-T G.694.1 OTU4 signal. It has function versions of TN54 TN56 TN57 TN58 and TN59, different versions have different FEC Encoding.

This board is not supported in OSN 6800 and OSN 3800, only to be supported in OSN 8800 with different types of subrack, and it has mapping system versions, the following table shows mappings among NS4 and hardware and software versions.

Board	Initial Versiona	General 8800 T64 Subrack	Enhanced 8800 T64 Subrack	General 8800 T32 Subrack	Enhanced 8800 T32 Subrack	8800 T16 Subrack	8800 Universal Platform Subrack	6800 Subrack	3800 Chassis
TN54NS4	V100R007C00	Y	Y	Y	Y	Y	Y	N	N
TN56NS4	V100R008C00	Y	Y	Y	Y	Y	Y	N	N
TN57NS4	T65: V100R009C10SPC300 Other: V100R008C10	Y	Y	Y	Y	Y	Y	N	N
TN58NS4	T65: V100R009C10SPC200 T58/T68: V100R010C00SPC200 T31: V100R010C10SPC100 T50/T62: V100R011C00 Other: V100R009C10SPC100	Y	Y	Y	Y	Y	Y	N	N
TN59NS4	V100R013C10	Y	Y	Y	Y	Y	Y	N	N
a: If there is a substitution relationship between two boards and one of the boards is used to replace the other board, the device initial version supported by the replaced board takes effect. For example, when you use TN56NS4T11 to replace TN54NS4T11, TN56NS4T11 can be supported by V100R007C00.

 

NS4 Board mode

NS4 supports line mode and relay mode, but when it works in different OSN8800 subracks, its supported working mode is not the same, and it requires use specified cross-connect boards. Below table is the NS4 supported board mode in OSN8800 subracks.

Board	General 8800 T64 Subrack	Enhanced 8800 T64 Subrack	General 8800 T32 Subrack	Enhanced 8800 T32 Subrack	8800 T16 Subrack	8800 Universal Platform Subrack
TN54NS4	relay mode	line mode (TNK2USXH+TNK2UXCT ) Or relay mode	relay mode	line mode (TN52UXCH/TN52UXCM) Or relay mode	line mode (TN16UXCM) Or relay mode	relay mode
TN56NS4	relay mode	line mode (TNK2USXH+TNK2UXCT ) Or relay mode	line mode (TN52UXCH/TN52UXCM) Or relay mode	line mode (TN52UXCH/TN52UXCM) Or relay mode	line mode (TN16UXCM)	relay mode
TN57NS4	relay mode	line mode (TNK2USXH+TNK2UXCT ) Or relay mode	relay mode	line mode (TN52UXCH/TN52UXCM) Or relay mode	Or relay mode	relay mode
TN58NS4	relay mode	line mode (TNK2USXH+TNK2UXCT ) Or relay mode	relay mode	line mode (TN52UXCH/TN52UXCM) Or relay mode	line mode (TN16UXCM) Or relay mode	relay mode
TN59NS4	relay mode	line mode (TNK2USXH+TNK2UXCT ) Or relay mode	relay mode	line mode (TN52UXCH/TN52UXCM) Or relay mode	line mode (TN16UXCM) Or relay mode	relay mode
When NS4 works in line mode, the relative subrack must use specified cross-connect boards. TN56NS4 can work in line mode on a general OSN 8800 T32 subrack only when OSN 8800 T32 standard subrack speedup (per subrack) license is configured.

 

NS4 board 8 application scenarios

1, conversion between 80 channels of ODU0 signals and one channel of OTU4 signals

2, conversion between 80 channels of ODUflex signals and one channel of OTU4 signals

3, conversion between 40 channels of ODU1 signals and one channel of OTU4 signals

4, conversion between 10channels of ODU2/ODU2e signals and one channel of OTU4 signals

5, conversion between 2channels of ODU3 signals and one channel of OTU4 signals

6, conversion between 1channel of ODU4 signals and one channel of OTU4 signals

If you need NS4 in above application scenarios, TN54NS4 must to be added on the NMS, and

TN56NS4/TN57NS4/TN58NS4/TN59NS4 Board Mode parameter must be set to Line Mode.

 

7, implement the electrical regeneration of one channel of OTU4 signal

TN54NS4: This application scenario is supported only when 54NS4(REG) is added on the NMS.

TN54NS4/TN56NS4/TN57NS4/TN58NS4/TN59NS4: In this application scenario, Board Mode parameter must be set to Electrical Relay Mode or Optical Relay Mode. When optical-layer and electrical-layer ASON are enabled, it does not matter whether the Board Mode parameter is set to Optical Relay Mode or Electrical Relay mode. The parameter must be set to Optical Relay Mode for the line board in a non-ASON system; otherwise, end-to-end management of services is not available.

• TN57NS4T65/TN58NS4T65: T65 supports only the regeneration application in the non-ASON scenario where the same wavelength is used at the transmit and receive ends.
• Other NS4 boards: The input and output wavelengths can be different.

 

8, hybrid transmission scenario

 

 

The IN/OUT port can transmit a mixture of ODU0, ODU1, ODU2/ODU2e, ODUflex, and ODU3 signals, the total bandwidth cannot exceed 100 Gbit/s. 

100G NS4 has many functions versions, and each version has many variants like TN57NS4T01 T31 T51 T52 T53 etc. Which indicates WDM-side optical modules different specifications. This article just introduce NS4 board mode, if you have other configuration doubts or using questions about it, freely contact thunder-link.com supports team.