Tyco Safety Products / Software House PI26 User Manual

The apC/8X automatically sets up modems that are configured using software 
commands, based on the modem’s default settings. However, the default 
settings of some modems do not turn command echo off and enable DTR. 
This causes unpredictable behavior when the apC/8X is used in dialup mode.

To ensure proper operation with modems normally configured with software 
commands, you must program the modems manually at a terminal with the 
following Hayes Modem programming commands. 

Note: If your modem does not accept the Hayes Modem commands, 

consult the modem documentation for the equivalent commands. 

Perform this procedure only once after installation, since the user-defined 
configuration will be restored with each power-up. Consult your modem 
documentation for more information about configuring your particular 
modem.

Table D.3: Hayes Modem Programming Commands

Use this command

For

AT&F <CR>

Recall factory defaults

ATEO <CR>

Command echo off

AT&D2 <CR>

Enable DTR

AT&W <CR>

Save as the first user-defined configuration