Differences and precautions between timeslot allocation modes of the ClientLP port of a TOM board on OSN 6800

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TOM boards support automatic and manual timeslot allocation modes. The timeslot allocation mode can be modified on the WDM timeslot configuration page and the default mode is automatic allocation.
1. In automatic allocation mode, the timeslots are automatically allocated based on the channel service type settings of the internal logical port ClientLP on a TOM board. Timeslot channels are preferentially allocated to the port for which service types are configured and the timeslot channels are sorted by size in ascending order. For non-cascading tributary TOM boards, 16 timeslots are configured for the 4 ClientLP ports. For example, if GE services are first configured for the ClientLP1-1 port and STM-4 services are configured for the ClientLP1-2 port, timeslot channels 1�? are automatically allocated to the ClientLP1-1 port on the WDM timeslot configuration page and timeslot channels 5�? are automatically allocated to the ClientLP1-2 port. Vice versa, if STM-4 services are first configured for the ClientLP1-2 port and GE services are then configured for the ClientLP1-1 port, timeslot channels 1�? are allocated to the ClientLP1-2 port and timeslot channels 5-11 are allocated to the ClientLP1-1 port. The IDs of the receive and transmit timeslots must be consistent.
2. In automatic allocation mode, pay attention to the mapping between timeslots at the service adding and dropping ends. The service type setting sequence may cause incorrect connection between timeslots at both ends, causing a service provisioning failure.|
3. In manual allocation mode, the IDs of the receive and transmit timeslots on the ClientLP port are manually set. The timeslot quantity and service types must be consistent. For example, STM-16 services correspond to 16 timeslots, GE services to 7 timeslots, and STM-4 services to 4 timeslots. For the mapping between timeslots and other types of services, see the attachment. The receive and transmit timeslots can be different, but those at the service adding and dropping ends must be consistent.
4. For the ClientLP port for which no service type is configured, the port will not be displayed in the timeslot configuration information. If no service type is set for any channel of a ClientLP port, the port also cannot be selected during ODU1 cross-connection configuration.

Other related questions:
Differences between timeslot allocation modes of the ClientLP ports on TOM boards on OSN 6800 devices and related precautions
Question: The current product manuals and configuration manuals for OSN 6800 devices do not describe timeslot configuration for TOM boards. When timeslots are incorrectly configured, services will fail to be provisioned, or abnormal alarms will be reported, which also causes the failure to provision services. Why? Analysis: The service type configuration sequence for channels on the ClientLP port is associated with the automatic timeslot allocation mode. Answer: Timeslots of TOM boards can be automatically or manually allocated. The automatic timeslot allocation mode is used by default. You can change the allocation mode in the WDM timeslot configuration window. 1. In automatic allocation mode, timeslots are automatically allocated based on the channel service type configured for the logical port ClientLP on TOM boards. The TOM boards, whose service types are first configured, will be first allocated with timeslot channels with channel numbers sorted in ascending order. In the non-cascading mode, each ClientLP port of a TOM board is allocated with 16 timeslots. For example, if the GE service is first configured for the ClientLP1-1 port and then the STM-4 service is configured for the ClientLP1-2 port, channels 1 to 7 (transmit and receive timeslots) will be automatically allocated for the ClientLP1-1 port in the WDM timeslot configuration window, and channels 5 to 8 will be allocated for the ClientLP1-2 port. Reversely, if the STM-4 service is first configured for the ClientLP1-2 port and then the GE service is configured for the ClientLP1-1 port, timeslots 1 to 4 will be allocated for the ClientLP1-2 port and 5 to 11 will be allocated for the ClientLP1-1 port. The numbers of transmit and receive timeslots are consistent. 2. In automatic mode, pay attention to the timeslot mapping between the service adding and dropping ends. The incorrect service type setting sequence may cause an incorrect association between timeslots at two ends and also a failure to provision services. 3. In manual mode, the transmit and receive timeslot numbers are manually configured for ClientLP ports. The number of timeslots must be consistent with service types. For example, the STM-16 service occupies 16 timeslots, the GE service occupies seven timeslots, and the STM-4 service occupies four timeslots. The transmit and receive timeslots at the ports can be inconsistent, but the transmit and receive timeslots at the adding and dropping ends of a service must be consistent. 4. If no service type is configured for a ClientLP port channel, the channel will not be displayed in the timeslot configuration window. If no service type is configured for all channels at a ClientLP port, the port cannot be selected in ODU1 cross-connection configuration. Suggestion and conclusion: You should understand the timeslot allocation rules for channels on TOM boards, preventing the failure to provision services when timeslots are incorrectly configured.

Transmission distance and receive optical power range of a TOM board on OSN 6800
The transmission distances of a TOM board on OSN 6800 can be 10 km, 40 km, and 80 km. The receive optical power range is �? to �?0 dB.

Precautions for configuring services on ports of the tributary board 201LP on OptiX OSN 6800
1. The electrical-layer service grooming features of the TQM board determine the service configuration of the tributary board 201LP. For details, see the graph of the electrical-layer service grooming model on the TQM board in the attachment. 2. According to the graph of the electrical-layer service grooming model, after ANY-level service grooming, services can be cross-connected from the client-side TX/RX ports to channels LP1.1 to LP1.4. The services are integrated into the ODU1 on the encapsulation module. Then ODU1 grooming is implemented through the LP port and line board. The maximum rate supported by the TQM board is ODU1. 3. ANY-level channels LP1.1 to LP1.4 and ODU1 LP channels are collectively called 201LP/LP on the T2000, which causes misunderstanding. Therefore, the source optical channel ID must be set to 1 when ODU1 cross-connections are configured from 201LP/LP channels on the tributary board to the NS2 board. 4. Currently, the TDG TQM boards are involved in this situation.

Precautions for configuring electrical cross-connections for different services on a tributary board of the OSN 6800
On the OSN 6800, electrical cross-connections of GE or Any services are between physical ports and logical ports on a tributary board. When configuring electrical cross-connections, set the level of GE service cross-connections to GE, and set the level of other service cross-connections to Any.

Difference between the standard mode and compatible mode of OSN 8800 boards
In V100R006C01 and later versions, some boards use a new board model. To distinguish the new board model from the existing board model, the new board model is called the standard mode and the original one is called the compatible mode. For boards in standard mode, the NMS displays the service mapping paths of trails or physical ports only, and all ODU-layer service mapping paths are displayed on physical ports. In standard mode, you do not need to consider logical ports of boards during cross-connect configuration. Compared with compatible mode, standard mode involves fewer mapping path layers, facilitating configuration and reducing maintenance costs.

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