Specifications
Table Of Contents
- AT-8900 Series Hardware Reference
- Contents
- Models Covered By This Reference
- Why You Should Read This Reference
- Where To Find More Information
- Hardware Description
- Online Documentation
- AT-TFTP Server
- Using Windows Terminal and Windows Hyperterminal
- Switch Start-up
- RS-232 Terminal Port (ASYN0)
- Useful Cables
- Test Facility
- Power Supply Units (PSUs)
- Port, Connector, and Cable Combinations
- Troubleshooting
- Expansion Options
- Restricted Procedures
- Contacting Us
Hardware Reference 5
C613-03075-00 REV A
Switching Core
• Application-Specific Integrated Circuit (ASIC) switch chip
• Non-blocking L2 and L3 IP Switching
• 256K IPv4 address table
• 4K multicast table
• 4K logical Layer 3 interfaces
• Shared 32 MByte DDR-SDRAM packet buffer
Processing Core
• 400 MHz RISC Processor
• 128 MBytes Synchronous DRAM (expandable to 256 MByte or 512
MByte with DIMM)
• 32 MBytes of fixed flash
• Compact flash socket for hot swappable expansion of flash memory up
to 128 MBytes
• 512kBytes of SRAM
• 32/66 PCI bus for 32bit/33MHz
• Silicon ID chip storing serial number, board ID, and MAC address
Asynchronous Serial Port
•Up to 115 kbps
• Universal Asynchronous Receiver Transmitter (UART)
• Standard RJ-45 connector
• Hardware-flow control
AT-8900 Series Switch Models
This section provides hardware descriptions for individual switch models.
AT-8948
(See Figure 1 on page 6)
• 48-port 10/100BASE-T (RJ-45 connectors), MDI or MDIX, full or half
duplex
• 4-port 1000BASE-X SFP uplink sockets, full duplex
• Compact flash socket
• One DIMM socket for expansion of Synchronous DRAM
• Auto-negotiating Layer 3 Managed Switch
• Hot-swappable load sharing PSUs
• AC or DC PSU options