Specifications

Hardware Reference 5
C613-03092-00 REV D
48-Port Fast Ethernet Switches
These Fast Ethernet switches meet the exceptionally high performance
demands of high-end applications. They deliver wire-speed switching in a
robust 1U rack mount platform, and are:
■ AT-8948
■ x900-48FE
■ x900-48FE-N (NEBS compliant model)
Environmental
conditions
■ Operating temperature range: 0ºC to 50ºC (32 to 122ºF)
■ Storage temperature range: -25ºC to 70ºC (-13 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
■ Non-blocking Layer 2 and Layer 3 IP switching
■ 256K IPv4 address table
■ x900-48FE switches are IPv6-ready in hardware to provide accelerated
unicast and multicast routing
■ 4096 Layer 2 multicast entries
■ 1024 Layer 3 IPv4 multicast entries
■ 4K logical IPv6 interfaces
■ 32 Mbytes DDR-SDRAM packet buffer shared among ports
Processing core ■ 350MHz RISC Processor
■ 32MBytes of fixed flash
■ 256MBytes of Synchronous DRAM, expandable to 512MBytes with DIMM
■ CompactFlash slot for hot-swappable expansion of flash memory up to
128MBytes
■ 512 kBytes of SRAM
■ 32/66 PCI bus for 32-bit/33MHz
■ Silicon ID chip stores serial number, board ID, and MAC address
IPv6 accelerator card AT-8948 switches have a slot for an optional network processor accelerator card
to provide accelerated unicast and multicast routing in hardware
• 4096 Layer 3 IPv6 multicast entries
• 1000 accelerator hardware filters
• 128MBytes Synchronous DRAM giving 64K IPv6 routes