Overview of System Control and Communication Boards in OptiX OSN 9800 U Series Subracks
A system control and communication board interoperates with the NMS to manage boards and achieve communication between NEs. It supports NE data backup, intra-subrack configuration management, and alarm output.
Mapping Between CTU Boards and Subracks
| Board | Description | OSN 9800 U64 Standard Subrack | OSN 9800 U64 Enhanced Subrack | OSN 9800 U32 Standard Subrack | OSN 9800 U32 Enhanced Subrack | OSN 9800 U16 central cluster chassis |
|---|---|---|---|---|---|---|
| TNU2CTU | System control and communication board with the clock processing function | Y | Y | Y | Y | N |
| TNS2CTU | System control and communication board with the clock processing function | N | N | N | N | Y |
| TNU4CTU | System control and communication board with the clock processing function | Y | Y | Y | Y | N |
| TNU5CTU | System control and communication board with the clock processing function | Y | Y | Y | Y | N |