The Active-LD Landline Auto-Dialer is a designed to connect to any device that provides a NO/NC (Normally Open/Normally Closed) alarm contact.
The Active-LD uses the Landline (PSTN) network to communicate user recordable voice messages direct to the correct on call personal, because it uses the Landline (PSTN) network you don’t need to worry about the mobile networks getting clogged during busy periods or the reception dropping out.
Connections: 