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Mystery Tones

I have an E-40 entry phone, a K-1900-5 to dial the number for the entry phone and a SRC-1 for touch tone door control.  When the E-40 calls and the remote party tries to dial the touch tone command to open the door, there is a constant beeping sound that sounds like a continuous string of touch tones.  Where are these tones coming from?

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The K-1900-5 is producing the continuous touch tones as part of a “restriction” feature.  The “restriction” feature of the K-1900-5 must be disabled in an application like yours, to eliminate the continuous touch tones.  Access the programming mode of the K-1900-5 and dial “*02” to disable touch tone and flash restriction.

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