MT2834BL

Chapter 5 - Command Mode

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide

5.4.12 Immediate Action Commands

Help Screens $H

The Help command is designed to give you short explanations on how to use each modem

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 modem 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 MT2834BA, MT2834BL depending on model.

Windows 95 Autodetect Inquiry I9

This read command permits a Windows 95 operating system to query the MultiModem’s

characteristics. When ATI9<CR> is entered the symbols BA 28800 FAX CT are displayed; which

indicates to the Windows 95 system that your particular modem is a MT2834BA (orBL), 28,800 bps,

fax Class 2 capable modem. With autodetect support in your MultiModem, your PC can automatically

allocate resources and configure it and other devices. The MT2834BA implements autodetect

capability in the form of a single .INF (Information) file that specifies AT Command mode and Result

Code "Registry Keys" that are specific to your MT2834BA.

Listing Current Operating 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 modem’s current operating parameters is ATL5 for the basic parameters.

Entering ATL7 lists additional parameters on the modem.

Listing S-Register Values L6

Entering ATL6 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.