Overview
The initial monitoring technology utilized by the City and County of Denver Electronic Monitoring Program uses radio frequency technology (RF). This continues to be our most used type of technology. This type of monitoring is used for individuals who are required to be inside their residence at all times or sentenced to a specific curfew. The general public knows this type of monitoring as “house arrest” or “home detention”.
How it Works
The monitoring equipment includes both an ankle bracelet and a monitoring base station. The ankle bracelet emits a specific radio frequency “beacon”, maintaining communication with the base station while the defendant is at home. If the defendant leaves the residence, the base station fails to detect the signal from the bracelet and records the incident. The record includes the date and time the defendant left the residence. A matching record is created when the defendant returns home.
Benefits & Success
RF monitoring helps to enforce post-conviction requirements. The defendant and their officer establish an agreed upon schedule for work, community service, treatment, and any other approved activities. If a recorded absence from the home occurs within the bounds of the schedule, the officer verifies the whereabouts of the defendant by matching it with documentation from the employer or other approved entity. If the defendant leaves the residence outside the bounds of the schedule, the system notifies the officer of the violation.
Equipment
Base station units are available in a landline version and a cell unit version. Landline base 
stations stay at the residence plugged into the power and phone lines.
Cell units can be utilized by clients who do not have access to a basic phone line, such as when living in a motels or halfway house, or a home without a phone line. Cell units also feature a built in motion detector to ensure that the client does not move the unit to another location.
Any tampering or removal of the ankle bracelet component is reported by the base station as soon as possible.
Additional Resources
HomeGuard Hook-up Procedure