Difference between the random and consecutive modes for configuring ODU timeslots when the LOA board works in ODU0 non-convergence mode

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If the ODU timeslot configuration mode is set to Assign random, the board supports Any->ODU0->ODU2->OTU2. If the ODU timeslot configuration mode is set to Assign consecutive, the board supports Any->ODU0->ODU1->ODU2->OTU2. The difference between the two modes lies in whether the ODU1 chip is involved in mapping processing for intra-board cross-connections.

Other related questions:
Difference between Assign consecutive mode (fixed timeslot mode) and Assign random mode (flexible timeslot mode) of a line board
The Assign random mode indicates that cross-layer mapping can be performed for services, such as ODU0->ODU2, ODU1->ODU2, and ODUflex->ODU2. Cross-layer mapping reduces the number of mapping layers and simplifies the relationship between client and server trails, facilitating management. Cross-layer mapping enables flexible bandwidth usage. For example, when seven 1.25G timeslots of an ODU2 pipe are occupied by ODUflex services, the remaining 1.25G bandwidths can be used by cross-layer mapping from ODU0 to ODU2. Assign consecutive indicates that layer-by-layer mapping of services is performed from lower rates to higher rates, for example, ODU0->ODU1->ODU2 and ODU1->ODU2. The Assign random mode is recommended. When two line boards are interconnected on the WDM side, they must have the same setting of the ODU Timeslot Configuration Mode parameter.

Difference between compatible mode and standard mode when the TOA board works in ODU1 convergence mode
The only difference lies in internal port names.

Working mode of the TOA board when ODU0 services are configured on the board
When ODU0 services are configured, the working mode of the TOA board must be set to ODU0 non-convergence mode (Any -> ODU0).

Reason for not selecting TX1/RX1 to transmit FC400 services on the LOA board in ODUflex non-convergence mode
When an LOA board works in ODUflex non-convergence mode, the TX1/RX1 port corresponds to the 201ClientLP port, and no service needs to be configured between the two ports. Therefore, when FC400 services need to be transmitted through the TX1/RX1 port, select the 201ClientLP port on the NMS.

Difference between cascading mode and non-cascading mode
TOM boards can work in cascading or non-cascading mode. In cascading mode, the total client-side service rate for each TOM board must be less than or equal to 2.5 Gbit/s. In non-cascading mode, the total client-side service rate for each TOM board must be less than or equal to 10 Gbit/s. When working in cascading mode, each TOM board can map a maximum of eight client-side services into one ODU0 or ODU1 signal. When working in non-cascading mode, it can map a maximum of four client-side services into one ODU0 or ODU1 signal. To map more than four client-side services into one ODU1 or ODU0 signal, the cascading mode is recommended. To map four or less client-side services into one ODU1 or ODU0 signal, the non-cascading mode is recommended.

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