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Appendix F - MMH2834 Modem Commands
F.12Immediate Action Commands
Help Screens $H
The Help command is designed to give you short explanations on how to use each MMH2834
command. The Help command can be quite useful if your manual is not handy and you are in the
middle of a communications session. Although the explanations are quite abbreviated compared
to those in this manual, they should prove to be helpful reminders when needed. At the time of
this writing, we have three screens of Help information (Screen #1, #2 and #3), and more
screens may be added in the future. The Help commands are structured so that you can call up
one of three Help screens, as follows:
AT$H1 = Help Screen #1
AT$H2 = Help Screen #2
AT$H3 = Help Screen #3
Inquiry for Product Code I
Some systems or software packages automatically check the “identification” of the modem with
which they are communicating, by using the I command. This “read” command lets the software
to determine the type of modem with which it is communicating.
When ATI or ATI0 is entered, the MMH2834 responds with 247. When ATI1 is entered, the
modem responds with a three-digit code indicating the firmware version number. When ATI2 is
entered, the modem responds with MMH2834.
Listing Current Operation Parameters L5, L7
The L5 and L7 commands list the current operating parameters of your modem. This information
can be very useful when you are changing communications software or when you are changing
modem default settings.
The command to list the MMH2834’s current operating parameters is ATL5 for the basic
parameters. The ATL7 command will list additional parameters on the MMH2834.
Listing S-Register Values L6
The L6 command lists the current values stored in the modem's S-register. This information can
be very useful if you wish to change S-register values. (Refer to Appendix E for more information
on S-registers).