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MultiModemBA User Guide
6.1 Introduction
This chapter describes how the MultiModem’s Callback and Remote Configuration features operate.
These features use a multilevel security system, which involves the use of LOGIN Passwords, Setup
Passwords and Remote Escape Characters.
The primary level security code is the modem’s LOGIN Password. Once this password is entered,
other passwords can be used. For instance, entering the LOGIN Password will allow you to enter the
Setup Password, which, in turn, allows you to enter Callback Passwords and dial back phone
numbers. Callback Passwords tell your modem what dial back phone number to call.
The Remote Escape Character is the key to using the Remote Configuration feature. The Remote
Escape Character lets you enter Command mode via a remote call, so that you can enter AT
commands just as if you were locally connected. You must also enter your modem’s Setup
Password. The Remote Escape Character is contained in S-Register S13.
6.2 Callback Feature Description
The Callback feature protects your network from unauthorized access and helps control long
distance costs. By use of Callback Passwords and dial back phone numbers, you can have your
modem "dial back" remote locations immediately after being called. A special command (Enable
Callback #DB) turns your modem into a Callback security modem. The Callback Password/Phone
number entry is protected by two-level security (your modem's LOGIN Password and Set-Up
Password) that keeps unauthorized personnel from changing parameters. When you first get your
modem, you need to change both security level codes to your unique settings.
The Callback Passwords and dial back phone numbers are in a special Callback Password/dial back
phone number memory (30 numbers long). You use the modem's LOGIN Password and the Set-Up
Password plus special Callback commands to access this memory. The memory is thirty numbers
long and replaces your modem's normal phone number memory.
Each number is 35 characters long and can contain commands as well as phone numbers. You need
to set up your modem with the numbers and codes as part of the dial back initialization procedures.
Your modem will also remember if the incoming call was reliable or not, and make the call back
accordingly.
6.3 Remote Configuration Description
The Remote Configuration feature is a network management tool that allows you to configure
modems remotely. This means you could configure modems anywhere in your network from one
location without having to visit the sites or rely on remote users to follow your instructions. With
Remote Configuration, which is protected by two level security, you can download new parameters,
program new V.42 capabilities and implement new features. Remote Configuration also makes
troubleshooting a remote location a lot easier.
The way Remote Configuration works is that S-Register S13 has been set up to contain the special
Remote Configuration escape code. When calling a Remote Configuration equipped modem, you
enter the proper Remote Escape code to enable entering your Set up Password. After entering it, you
can then execute AT commands as if you were connected locally. If you set S-Register S13 to zero,
Remote Configuration is disabled.
6.3.1 Initial Setup Procedures for Callback and RemoteConfiguration.
Your modem was shipped with a default LOGIN Password and Setup Password (LOGIN=MULTI-
TECH and Set-up=MODEMSETUP) so that you have access to the features used for configuring the
modem. Because the defaults are in the modem owner’s manual, and anyone can find out what they
are, you should change the codes as the first step of your initialization procedure.