Specifications

Hardware Reference 1
C613-03092-00 REV D
Contents
Devices Covered by this Document ................................................................... 3
Why You Should Read this Document ............................................................... 3
Hardware Overview .......................................................................................... 4
Common Traits ........................................................................................... 4
Mounting system ....................................................................................... 4
Asynchronous serial port ............................................................................ 4
48-Port Fast Ethernet Switches ................................................................... 5
Environmental conditions ..................................................................... 5
Regulatory standards ........................................................................... 5
Switching core ..................................................................................... 5
Processing core .................................................................................... 5
IPv6 accelerator card ............................................................................ 5
AT-8948 and x900-48 switches ............................................................ 6
Gigabit Switches ........................................................................................ 7
Environmental conditions ..................................................................... 7
Regulatory standards ........................................................................... 7
Switching core ..................................................................................... 7
Processing core .................................................................................... 7
Network processor accelerator card ..................................................... 7
AT-9924T switch .................................................................................. 8
AT-9924SP switch ................................................................................ 8
AT-9924T/4SP switch ............................................................................ 8
Expandable Gigabit Switches ...................................................................... 9
Environmental conditions ..................................................................... 9
Regulatory standards ........................................................................... 9
Switching core ..................................................................................... 9
Processing core .................................................................................... 9
AT-9924Ts and x900-24XT switches ................................................... 10
Switch LEDs .................................................................................................... 11
Fast Ethernet RJ-45 port LEDs ................................................................... 11
Gigabit RJ-45 port LEDs ............................................................................ 11
XFP port LEDs ........................................................................................... 11
SFP port LEDs ........................................................................................... 12
System LEDs ............................................................................................. 13
Using Online Documentation .......................................................................... 14
Using AT-TFTP Server ....................................................................................... 15
Using Windows Terminal and HyperTerminal ................................................... 16
How the Switch Starts Up ............................................................................... 19
AT-8948, x900-48FE, and AT-9900 Switches ............................................. 19
Process flow ....................................................................................... 19
Overrides ........................................................................................... 19
Regular output .................................................................................. 20
Types of messages ............................................................................. 20
AlliedWare messages ......................................................................... 20
AT-9924Ts and x900-24X Switches ........................................................... 22
Process flow ....................................................................................... 22
Overrides ........................................................................................... 22
Regular output .................................................................................. 23
Fallback output .................................................................................. 23
Bootloader messages ......................................................................... 24
AlliedWare messages ......................................................................... 25
SFP Ports ......................................................................................................... 27
Approved SFP transceivers ........................................................................ 27
Types of SFP transceivers ........................................................................... 28
To insert or remove an SFP transceiver ...................................................... 28
Management Ports ......................................................................................... 29
RS-232 Terminal Port (ASYN0) .................................................................. 29
Out-of-Band Ethernet Management Port .................................................. 29