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Chapter 3 - AT Commands
3.12 Immediate Action Commands
Use these commands to get information about AT commands and the current settings of the modem. For
additional immediate action commands, see “Line Probe Commands.”
A/ Repeat Last Command
Default: None
Type A/ to repeat the previous command. Do not precede this command with AT or press
ENTER to execute it.
In Inquire Product Code
n = 0, 1, or 2
Default: none
Some systems or software packages automatically check the identification of the modem by
using the I command. Besides using it to check the modem ID, you can use the I command
to check the version number of the modem’s built-in software, known as firmware.
ATI0 or ATI requests the modem’s ID number.
ATI1 requests the modem’s firmware version number. You can use this command to identify
your modem’s firmware level when calling Technical Support.
ATI2 requests the product name, such as MT2834MR6.
ATI5 requests the digital signal processor version number.
L5, L7 List Current Operating Parameters
Default: none
The L5 and L7 commands cause your modem to list its current operating parameters. These
lists are useful when you are changing communications software, or when you are
changing modem default settings. All modem configuration parameters are listed.
ATL5 lists the modem’s current operating parameters.
ATL7 lists additional modem parameters.
L6 List Current S-Register Values
Default: none
ATL6 lists the current values in the modem’s S-registers. This information can be very
useful if you wish to change S-register values.
L8 List Online Diagnostics
Default: none
The L8 command displays the modem’s online status. You can print this display and use it
as a modem status report or as diagnostic information (such as when calling Technical
Support).
To enter this command while online, type +++ATL8<CR>. Your modem’s online status will
be displayed, listing current operating conditions such as link type, line speed, serial speed,
line quality, and reason for last disconnect.
If you type +++ATL8 with the modem online, the current online status will be displayed. If
you type ATL8 with the modem in command mode, the most recent online status will be
displayed. If you type ATL8 immediately after modem power-up, the message NO
INFORMATION AVAILABLE will be displayed.