Mapping Client Services into ODUk Signals
This section describes how the OptiX OSN 8800 maps services into ODUk signals. WDM equipment uses standard mapping procedures or timeslots to map signals into ODUk signals.
- When using the standard mapping procedures, Huawei OptiX OSN 8800 directly maps signals into ODUk signals and supports flexible grooming of services.
- When using timeslots, the WDM equipment can aggregate multiple services at rates lower than 1.25 Gbit/s into one ODU0 signal, or multiple services at rates lower than 2.5 Gbit/s into one ODU1 signal. This function enables multiple services to share the same ODU0 or ODU1 bandwidth.
Mapping Client Services Using Standard Mapping Procedures
The OptiX OSN 8800 can map client services without using timeslots. It can use standard mapping procedures to map client services directly into ODUk signals, as shown in Figure 1.
Mapping Client Services Using Timeslots
The OptiX OSN 8800 divides an ODUk (k = 0, 1) signal into several timeslots, each with a bandwidth of 155 Mbit/s. It slices client services into 155 Mbit/s signal segments, each mapped into ODUk signals. The OptiX OSN 8800 can map multiple low-rate client services into one ODUk (k = 0, 1) signal, thereby improving bandwidth utilization.
The services that can be mapped into one ODU0 by OptiX OSN 8800 using timeslots include the following: FE, FDDI, ESCON, SDI, DVB-ASI, FC100, and FICON. Figure 2 shows how FE/FDDI and ESCON/SDI/DVB-ASI services are aggregated into one ODU0.
The services that can be mapped into one ODU1 by the OptiX OSN 8800 using timeslots include the following: FE, FDDI, STM-1, OC-3, ESCON, SDI, DVB-ASI, STM-4, OC-12, FC100, FICON, GE, HD-SDI, FC200, and FICON Express.Figure 3 shows how GE, STM-1/OC-3, and FC100 services are aggregated into one ODU1.
Multiplexing and Mapping ODUk Signals into OTUk Signals
This section describes the structure that the OptiX OSN 8800 uses to multiplex board TN12M4001
and map ODUk signals into OTUk signals. After the E/O conversion, the signals are sent to the WDM side.
The OptiX OSN 8800 can multiplex and map client signals into ODUk (k= 0, 1, 2, 2e, 3, 3e, 4, flex) signals and produce OTUk (k=1, 2, 2e, 3, 3e, 4) signals on the WDM side for line transmission. Figure 1 shows the ODUk multiplexing and mapping structure that the OptiX OSN 8800 supports.
