Site Monitoring Unit (SMU)
The Site Monitoring Unit is the communication link between the subject who wears the Personal Identity Device and the Monitoring Centre. One Site Monitoring Unit is usually located in the subject's home but additional units can also be sited in a place of work or training establishment should an extended curfew order be required.
The Site Monitoring Unit uses a dual receiver and aerial system, which together with its 99 levels of sensitivity enables an accurate boundary to be placed around curfew sites. As the Site Monitoring Unit has the ability to detect the presence of a large number of individual subjects, it is ideally suited for use in hostels, training establishments and work projects.
Information concerning the status of the Site Monitoring unit itself and each Personal Identity Device is sent to the Monitoring Centre as soon as an event or change occurs. Connection is made using a standard telephone line or an optional Site Monitoring Unit cellphone unit, when a telephone line is not available.
The Site Monitoring Unit has an integral battery that operates in the event of interference to the power supply. The battery is recharged from the power supply without reconfiguration when reconnected.
The Site Monitoring Unit is fully sealed, has no external switches accessible to the subject and in design resembles a domestic clock.
