Allied Telesis AR440S, Справочник по аппаратуре, Страница: 15 / 44

Hardware Reference 15
C613-03086-00 REV G
AR450S Router
Each AR450S provides:
■
five 10/100 Mbps full duplex, Layer 2 switched Ethernet LAN ports
All LAN ports have Auto-MDI, however if Auto-MDI is turned off, then all
ports are hard-wired as MDI-X. Software can also force a port to either MDI
or MDI-X.
■
two 10/100 Mbps full-duplex Eth WAN ports
■
two asynchronous ports (ASYN0 and ASYN1)
The RS-232 (V.24) asynchronous serial ports (ASYN0, ASYN1) have DB9
male connectors, are wired as DTE ports and can be used as general purpose
ports for terminals, printers or modems. For pin wiring and default
communication settings, see
“Asynchronous Interfaces” on page 17 .
The following figure shows the front and rear panels of the AT-AR450S router.
Hardware Features
■
400 MHz RISC processor
■
64 MBytes of SDRAM, expandable to 256 MBytes
■
16 MBytes of flash memory (1 MByte reserved for boot code)
■
on-board hardware encryption processor
■
802.1Q tagged VLAN support
■
universal AC power supply
Random Access
Memory (RAM)
The AR450S has 64 MB of SDRAM provided on a single DIMM. 128 MB and
256 MB ECC SDRAM are also supported. See your authorised Allied Telesis
distributor or reseller for upgrade options. Other supplier’s DIMMs are not
approved, and therefore not supported, but may function correctly.
The amount of DRAM present in a router can be checked using the command:
show system