Up for sale is the United Security Products Automatic Voice Dialer Model AVD-4+2 as
pictured
above.
This
vintage product is in great working condition with signs of normal wear. It was fully tested before being removed from an operational system. This model is a Two Channel Voice Dialer that transmits Two distinct 16-second Voice Messages to Four Programmed Phone Numbers when tripped by an alarm panel or connected sensor. This unit operates with a Normally Closed (NC) dry contact (continuous) or DC voltage activation, 5-28VDC (continuous or momentary). It can be programmed to sequentially dial any combination of up to four standard telephone numbers or alpha-voice pager numbers. The dialer features busy-line and no-answer detection, to ensure timely transmission of both recorded 16-second alarm messages. Please reference attached excerpts from included installation manual to confirm compatibility with your specific application. Note that cables are not included (and you will need to have compatible modular telephone cable and power/alarm cable).