Reason why the timeslots occupied by GE services on the LOM board are different from those on other boards

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The LOM board is specially designed to map client-side services to STM-64 signals and then encapsulate the services into OTU2 signals. STM-64 is divided into eight timeslots, and the bandwidth of each timeslot is 1.24 Gbit/s. Therefore, only one timeslot is required for the GE service.
In contrast, the bandwidth of each timeslot on other boards is 155 Mbit/s, and 7 timeslots are required for the GE service.

Other related questions:
Differences between timeslots occupied by GE services on LOM boards and those on other boards
Different from other boards, a LOM board maps a client service into an STM-64 signal and then multiplexes the STM-64 signal into an OTU2.An STM-64 signal is divided into 8 timeslots, each of which occupies 1.24 Gbit/s bandwidth. Therefore, a GE service on a LOM board occupies one timeslot. On other boards, each timeslot occupies 155 Mbit/s bandwidth. Therefore, a GE service on another board occupies seven timeslots.

FC services that are supported by the LOM board
The LOM board supports the following FC services: FC100: SAN service at a rate of 1.06 Gbit/s FC200: SAN service at a rate of 2.12 Gbit/s FC400: SAN service at a rate of 4.25 Gbit/s

Whether two GE services on two TOM boards can be cross-connected to the same ODU1 timeslot on an ND2 board
The cross-connections between the TOM and ND2 boards are ODU1 cross-connections, which occupy the entire ODU1 timeslot. Therefore, two GE services on two TOM boards cannot be cross-connected to the same ODU1 timeslot of an ND2 board.

Service interconnection between TOA and TOG boards
Services on the TOA board can be interconnected with those on the TOG board.

Board timeslot configuration
You can set the timeslot configuration mode on the WDM-side port of a board. The service mapping paths of a board vary depending on the ODUk timeslot configuration mode. In Assign consecutive mode, level-by-level service mapping is performed from lower rates to higher rates, for example, ODU0->ODU1->ODU2. In Assign random mode, cross-level service mapping is performed from a low rate to a high rate, for example, ODU0->ODU2.

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