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If you think you need to analyze your phone line then you've found the ideal analyzer for phone lines.
Common voltage sensing phone recorders that start recording when you pick up the phone will never even know you are there. They will simply remain on the line in standby mode because the phone line analyzer will render it useless.
But what about those pesky, high tech crystal controlled parallel line transmitters? Useless... The phone line analyzer will simply shift their frequency and they will transmit nothing but static. Even the feared VOX, voice activated, systems are putty in the hands of the phone line analyzer. The Safe Line 100 Anti-Vox systems are neutralized so that the money and effort put into installing these devices by your adversary are futile.
You will be alerted to any extension eavesdroppers by a special "muting" circuit that stops your conversation until the offender disconnects or you decide to override the system by switching off of safe mode.
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