How Does our Client Side Signals Convert into ODUKs?

Hi there！
To convert a customer service into an ODUk service, encapsulation is required frequently. Ethernet services can be encapsulated in MartinioE or StackVLAN mode. The default value is MartinioE. It's like we're going to mail an item and need to put it in a box to mail it.
WDM equipment uses standard mapping procedures or timeslots to map signals into ODUk signals.

When using the standard mapping procedures, the 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.

More: Service Mapping

Thank you！