6.4 Help Utility
You may get help by pressing the ? key or entering “help”. The help info
depends on the context:
At top level, a list of command groups is displayed.
At group level, a list of the command syntaxes for the current group is
displayed.
If the help command is issued for a specific command, the command
syntax and a description of the command are shown.
6.5 Example
The command hierarchy and the help utility is demonstrated in the
following example:
> ? <enter>
Commands at top level:
System – System commands
Console – Console commands
Port – Port commands
MAC – MAC table commands
VLAN – VLAN commands
Aggregation – Aggregation/Trunking commands
LACP – IEEE802.3ad Link aggregation commands
RSTP – IEEE802.1w Rapid Spanning Tree commands
User Group – User Group commands
QoS – QoS commands
Mirror – Mirror commands
IP – IP commands
Dot1x – Dot1x commands
Debug – Debug commands
> console <enter>
Console> ? <enter>
Commands at Console level:
Console Configuration
Console Password [<password>]
Console Timeout [<timeout>]
Console Prompt [<prompt string>]
Console> password ?
Syntax:
Console Password [<password>]
Description:
Set or display console password. The empty string (“”) disables the
password check.
[<password>]: Password string of up to 16 characters.
Console>
Chapter 7 Small Form Pluggable
（
SFP
）
7.1 Specifications
Optical transceivers support gigabit single/multi-mode, and transfer as
far as 80 kms distance; original SFP modules are recommended to be
used. Supportable optical transceivers are listed as following
：
SFP-GIG-SX
Gigabit Ethernet optical transceiver(supports
850nm wavelength multi-mode, LC connector).
Up to 550 meters through
50/125μm multi-mode
fiber
, and up to 275 meters through
62.5/125μm
multi-mode fiber.
Gigabit Ethernet optical transceiver(LC connector).
Up to 10 kms through 1310nm wavelength single
-mode fiber.
Gigabit Ethernet optical transceiver(LC connector).
Up to 40 kms through1310nm wavelength single
-mode fiber.
Gigabit Ethernet optical transceiver(LC connector).
Up to 80 kms through 1550nm wavelength single
-mode fiber.
SFP-GIG-LX
SFP-GIG-LH40
SFP-GIG-LH80
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