Specifications

Hardware Reference 7
C613-03092-00 REV D
Gigabit Switches
AT-9900 Series switches are advanced gigabit Ethernet multi-layer switches,
perfect for the high-density rack environment where space is at a premium.
They are:
■ AT-9924T
■ AT-9924SP
■ AT-9924T/4SP
Environmental
conditions
■ Operating temperature range: 0ºC to 50ºC (32ºF to 104ºF)
■ Storage temperature range: -25ºC to 70ºC (-13ºF to 158ºF)
■ Relative humidity range for operation: 5% to 80% non-condensing
■ Relative humidity range for storage: 5% to 95% non-condensing
■ Operational altitude: 3,050 metres maximum (10,000 feet)
Regulatory
standards
■ EMC: EN55022 class A, FCC class A, and VCCI class A.
■ Immunity: EN55024, EN61000-3, levels 2 (Harmonics), and 3 (Flicker)—
AC models only
■ Safety: UL60950-1, CAN/CSA-C22.2 No. 60950-1-03, EN60950-1,
AS/NZS60950, and EN60825-1
■ Certification: UL, cUL, and TUV
Switching core ■ Application-Specific Integrated Circuit (ASIC) switch chip
■ High performance IPv4 switching
AT-9924T and AT-9924SP
• 64MBytes packet buffer memory
AT-9924T/4SP
• High performance IPv6 switching
• 98MBytes packet buffer memory
Processing core ■ 400MHz RISC Processor
■ 16MBytes of fixed flash with provision for an additional 16MBytes
■ CompactFlash card slot on the front panel for hot-swappable expansion of
flash memory up to 128MBytes
■ 256MBytes of Synchronous DRAM, expandable to 512MBytes with DIMM
■ 512kBytes of NVSRAM
■ Silicon ID chip storing serial number, board ID, MAC address, and
hardware revision level
Network processor
accelerator card
AT-9924T/4SP only
■ Optional network processor accelerator card provides accelerated IPv6
unicast and multicast routing in hardware
■ 512MBytes of Synchronous DRAM required, giving 64K IPv6 static routes
■ 4096 Layer 3 IPv6 multicast entries
■ 1000 accelerator hardware filters