Cascading relationship between ALM ports

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ALMO1 and ALMO2 ports have the same definition, and they are used for output and cascading respectively. ALMO3 and ALMO4 ports have the same definition, and they are used for output and cascading respectively. For example, if the ALMO1 port is used to output alarm signals, the ALMO2 port can be used as an alarm/cascading port and be connected to an ALMO1 port in another subrack.

Other related questions:
What is the relationship between the mini USB port and console port of an AR
Each main control board provides a console port and a mini USB port. To configure an AR, connect the serial port of the user terminal to the console port of the AR or connect the USB port of the user terminal to the mini USB port of the AR. If a PC does not provide a console port, you can use a mini USB cable to connect a USB port on the PC to an AR's mini USB port and log in to the AR for basic configuration and management. Note: Before logging in to an AR through the mini USB port, you need to install the mini USB port driver on a user terminal. When the mini USB port and console port are connected at the same time, you can log in to the AR only through the mini USB port.

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.

Mapping relationship between the port sequence numbers on the NMS and physical ports on the TOM board
For the TOM board, physical ports 1�? correspond to port sequence numbers 3�?0 on the NMS.

Does cascading require MCU ports?
Cascading requires MCU ports. Each cascading channel requires one port of the upper-level MCU and one port of the lower-level MCU.

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