Technical data

Tech Note: Configuring a Modem for an ADR
Copyright © 2012 Peek Traffic Corporation. All rights reserved.
Page 5 of 11
99-363, 3
5. A typical modem file is only a few lines of text (shown below) that provides the text commands that will be sent to
the modem (using the standard 'AT' prefix). Typically, the first two lines are comment fields that identify the target
modem for this configuration file. You can change this text as long as the single quote (') remains the first character
on each line.
Figure 2 – A typical modem setup file open in Notepad
6. Use the parameter guidelines shown in Table 1 to edit the text file so that it contains the specific commands
required by your modem. However, be aware that these are just general guidelines. The specific commands
required to accomplish each setting may be slightly different for your modem. Consult your modem's manual to
verify the proper command to accomplish each step.
Modem commands can be combined together on the same line, but for the sake of clarity, each command may be
placed on its own line within the file.
Note If you are going to be using the modem with the TDP software, and you are
editing the modem file, keep in mind that the TDP software will only process a
maximum of 10 lines from the modem configuration file.
The order listed here is the proper order. The order that commands are processed is important. (For instance, you do
not want to write the parameters to the modem's memory (&W0) until all of the settings have been configured
properly.)
Table 1 – Guidelines for configuring a modem to work with an ADR
Purpose of the Command Typical command Notes
Factory Reset &F0 This should be issued as the first command to the
modem.
Delay DLY2 The reset should be followed with a delay of about two
seconds. This delay is specifically required by the ADR
Modem Configurer utility.
Enable Result Codes Q0 Tells the modem to send textual responses to queries
over the phone line. The ADR expects these code
responses.
Verbose result codes V1 Turn on the verbose version of the result codes.
Disable local echo E0
Connect at any baud rate refer to the
manual for the
modem
Configure the modem to answer at whatever phone line
baud rate is requested by the ADR. Some modems use
the command ‘F0’.
Minimum result codes X0