VAD-4 – Dial-up Remote Control

The VAD-4 is a user programmable telephone voice/pager auto-dialer and remote control. It features four optically isolated status inputs, four SPDT relay outputs, two temperature sensor ports, power failure input and unbalanced stereo silence sensor, which when tripped, will sequentially dial a pager and/or up to four different phone numbers and play back a user recorded voice message.

Categories: , SKU: c8ba76c27926


The VAD-4 can store up to four 32 digit phone numbers and one 32 digit pager phone number which may be associated with any or all of the inputs.



  •  Four user programmable wet or dry optically isolated status inputs.
  • • Two Fahrenheit/Celsius temperature sensor ports. Probes optional.
  • • Stereo Silence Sensor with remote telco audio monitoring.
  • • Four SPDT one-amp relays with momentary, latching or tone duration operation. One SPDT alarm tally relay.
  • • Power failure alarm input port.
  • • Balanced telco caller output port.
  • • Local programming and recording. The VAD-4 is supplied with spoken words and phrases in English, while the user is free to record words and phrases in their language.
  • • Front panel LED indicators for most operational activities.
  • • Front panel USB programming serial port, program switch with LED indicator.
  • • Front panel RJ-11 TT telephone jack used for user voice response recording.
  • • Stores up to four 32-digit phone numbers and one 32-digit pager number with up to 16 digits of pager data.
  • • Pager compatible.
  • • CPC (WINK/COD) detection.
  • • Non-Volatile Memory.
  • • User programmable message repeat and global lap counter.
  • • User programmable ring delay.
  • • Phone line and power supply with built-in surge protection.
  • • 12 volt DC universal AC input wall transformer. Optional international AC plug adapters.
  • • Plug-in euroblock screw terminals for status inputs, relays, telco audio balanced output and stereo unbalanced silence sensor inputs.
  • • Three units may be installed on one RA-1, RU-1 rack shelf.