Check your phone line for on-premises series and parallel bugs and wiretaps with the Telephone Wire Tap Detector. This device will also check your telephone for the most common types of hookswitch bypasses. A hookswitch bypass is a modification to the telephone instrument so that the carbon microphone (transmitter) or dynamic earphone (receiver) will pick up room sounds and pass them down the phone line to a listening post even with the phone hung up. This effectively turns the telephone into a room monitor.

This device will let you check your on-premises wiring and telephones for eavesdropping devices or taps. In order to do this, you must be able to disconnect your inside wiring from the telephone line coming into your home or business. This is done at the interface between the telephone line and inside wiring; usually just by unplugging a cable at the interface box mounted on the side of the building. There is nothing difficult about this, but, of course, you must have access to this interface box. An instructional manual comes with this device for a detailed information on how to install. 

Features & Benefits:

• Resistance of 61 ohms or more
• Detects parallel devices with a resistance of 65 megohms or less
• Case Dimensions: 4.25" x 3.25" x 1.5"