One of the most vulnerable components of the security system at your home is the telephone or digital voice line that provides primary communication between the system and Hi-Tech's Customer Monitoring Centers. That's why we offer you a backup solution - in the event of a telephone or digital voice line outage, we can transmit alarm signals to a Hi-Tech Customer Monitoring Center through a cellular network, helping prevent a lapse in your security service. Hi-Tech can help back up the security system if your telephone or digital voice service is disrupted.