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OPTION SELECTION
There are six ways to change or select options:
• LCD - Using the front panel LCD and pushbuttons is simple,
straightforward, and requires the least amount of technical
background. Chapter 4 explains LCD operation.
• AT Commands - The AT compatible command set can be used to
select modem options. Chapter 5 describes AT commands.
• V.25 bis Commands - An extended set of V.25 commands allows
selection of modem options during synchronous operation. Refer
to Chapter 11.
• Status Registers - A series of special ATS commands allows the
operator to change the decimal or hexadecimal value of a memory
byte to change one or more options in that byte. Chapter 10
describes S-registers.
• Single Bit Status Registers - A second series of special ATS
commands allows the user to change single bits within a byte to
change an option. Chapter 10 explains single bit control.
• Software program - A wide variety of software programs are
available, or advanced computer users can write their own
software programs to interact with the modem. This manual does
not discuss software programs.
POWERUP
A powerup procedure is not required. Turn the ON/OFF power switch
on the rear panel to ON. The modem is factory configured to operate in
most public switched telephone applications. If a user has stored a
desired option set it will be automatically be restored at power up.
V.3400
Chapter 3
Getting Started
3-1
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