Alaxala AX2200S Series Configuration Manual page 38

2 Switch Configuration
Figure 2-12 Hardware configuration (AX1240S-48T2C model)
The device chassis includes the main board, a power supply (PS) unit, and a fan.
(a) Main board
The main board consists of the SW subunit, memory card (MC), flash subunit, PHY subunit,
Sub-CPU subunit, and PoE subunit.

CPU (central processing unit) subunit
Switch-wide management, PHY subunit control, and protocol processing are
performed by software.
The software is stored in internal flash memory installed on the flash subunit.

SW (switch processor)
This subunit performs L2 frame switching. The SW subunit performs
hardware-based processing including MAC address learning and aging, link
aggregation, filter or QoS table lookups, and DMA transfers of incoming and
outgoing frames. Such processing actualizes high-speed frame switching.

MC (memory card)
MC slot. An SD card is used as a memory card for storing configuration files and
failure information.

Flash subunit (flash memory)
This subunit stores software, configuration files, and log data.

PHY (physical interface) subunit
This interface subunit supports various kinds of media.

Sub-CPU (sub-central processing unit) subunit
This subunit monitors the temperature sensor.

PoE or PoE Plus subunit (AX1240S-24P2C model)
This subunit supplies a maximum of 30 W power per port to Fast Ethernet ports and
power-receiving devices.
(b) PS (power supply)
The power supply converts power from an external source to DC power that can be used
inside the Switch. To replace the PS unit, you must stop and replace the whole Switch.
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