Abstract: The present invention is directed to a tamper protection device for protecting a telephone operated security alarm system. In particular, it protects a conventional security alarm system using telephone service lines from being disabled by an intruder before the alarm system has a chance to function. Telephone service lines are generally accessible from the exterior of the structure. The alarm system is protected by providing an service enclosure having a strong box and a dual conduit assembly to enclose the telephone service box and telephone service lines. The essential conduit assembly has inner and outer slotted concentric conduits to fully protect the service lines. The protection device includes sensors and switches to inform the security monitor before an intruder can disable the alarm system. A vibration sensor is activated when movements of the strong box and conduit occur and a signal is generated to announce the intruder.

Abstract: The present invention is directed to a local telephone line tamper protection device. In particular, it protects a conventional security alarm system using telephone lines from being disabled by an intruder before it has a chance to function. Telephone service lines are generally accessible from the exterior of the structure. The alarm system is protected by providing an service enclosure having a strong box and a conduit to enclose the telephone service box and service line. The protection device includes sensors and switches to inform the security monitor before an intruder can disable the alarm system. A vibration sensor is activated when movements of the strong box and conduit occur and a signal is generated to announce the intruder. The strong box has two access doors where the locked outside door must be opened to access the locked inside door. Each access door has a separate tamper switch means that generates a signal to also activate the alarm system.