Guardian Technologies Guardian Technologies, LLC Home Security System DVST User Manual

Connection to a PSTN telephone line is via a modem and modem port.

Sets MODEM operation, three parameters:

The MODEM= command controls three distinct parameters.

OFF
(default, OFF)

The reason is as follows; if set to ATMODE the DVST attempts to communicate with the
MODEM when starting up, exiting set up mode etc. The DVST will wait a set period of
time for replies before giving up. This will considerably slow the system if no MODEM is
attached.

DIRECT, ATMODE
(default, ATMODE)

The DIRECT mode is used if the MODEM has its telephone numbers
stored internally and the DVST does not pass telephone numbers for
dialling.

The ATMODE is most often used. The DVST passes numbers from
the dial menu to the MODEM which then initiates a call.

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Page 17

DVST Installation Guide

Modems