DTMF

The scientific term for the Touch Tone signal used on telephones, it is the existing standard for the use of twisted wire pairs to send signals.  Some PTZ cameras use DTMF signals in the transferring of telemetry information to the camera.  This allows users to move the camera by dialing the number for that camera and then pressing buttons on their phone. 

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Digimaster DTMF Decoder Digimaster Tone Decoder Unit is powered by a 9 volt battery. To change battery, remove screw in center of decoder and pull top cover off. Unit has a built in microphone and direct connect cable. Shows You What Phone Numbers Were Called The decoder will decode 16 digits in each of 3 memories.... Category: Audio Surveillance Part Number:

Hidden Camera Detector - Our Best Detector Detect Any Camera - Hard Wired or WirelessThis product will detect any camera, either wired or wireless, by picking up the horizontal oscillator frequency, 15.75 KHz, radiated by video cameras. Once the video camera is detected, its location can be quickly determined by the five-step LED meter and Sensitivity... Category: Counter Surveillance Part Number: