Do different versions of SL64 have great function difference?

Huawei STM-64 service board SL64 is available in functional versions of N4, N2 and N1, N2 version is discontinued.

Differences

• N1SL64/N4SL64 supports the board version replacement function, but does not support the TCM function or AU-3 services.
• N2SL64 does not support the board version replacement function, but supports the TCM function and AU-3 services, the TCM function and AU-3 services cannot be available at the same time.
• N4SL64 supports pluggable XFP optical modules.
• N4SL64 detects and reports voltage performance.
• SL64 boards of different versions support different loopback functions.

Substitution

When TCM function and AU-3 services are not required, N1SL64 can substitute for N2SL64.

When TCM function and AU-3 services are not required, N4SL64 can substitute for N2SL64.

N4SL64 supports the board version replacement function to substitute for the N1SL64.

Please kindly note that when you configure the MSP or SNCP, you cannot configure N1SL64 as the protection board if the working board is N2SL64 on which the TCM function is enabled or AU-3 services are configured. Otherwise, the services are interrupted when a switching operation is performed.