Specifications

6 AT-9900 Series Switch
C613-03084-00 REV A
Switching core
• Application-Specific Integrated Circuit (ASIC) switch chip
• High performance IPv4 switching
• High performance IPv6 switching (AT-9924T/4SP only)
• Shared 32 MByte DDR-SDRAM packet buffer
Processing core
• 400 MHz RISC Processor
• 16 MBytes of fixed flash (with provision for an additional 16 MBytes)
• CompactFlash socket on the front panel for hot swappable expansion of
flash memory up to 128 MBytes
• 512 kBytes of NVSRAM
• Silicon ID chip storing serial number, board ID, MAC address, and
hardware revision level
AT-9924T and AT-9924SP
• 128 MBytes Synchronous DRAM (expandable to 256 MByte or 512
MByte with DIMM)
AT-9924T/4SP
• 256 MByte Synchronous DRAM (expandable to 512 MByte with DIMM)
• 512 MByte Synchronous DRAM is required if AT-ACC01 network
processor accelerator card fitted
Asynchronous serial port
•Up to 115 kbps
• Standard DB9 female RS-232 connector
Network processor accelerator card (AT-9924T/4SP only)
• Optional network processor accelerator card provides accelerated IPv6
unicast and multicast routing in hardware
• 512 MBytes Synchronous DRAM required, giving 64 K IPv6 static
routes
• 4 K multicast table
• 1000 accelerator hardware filters