DTMF tone will be removed from the audio stream automatically and the DTMF will not pass to the customer service representative. This can be configured on ACDs / Switches at call centers. And therefore DTMF Clamping comes as the savior. In such a case, when the customer presses the card number or the expiry date or CVV data on the phone, a clever uncontrolled agent might be able to decode these keys using a DTMF Decoder ( usually not possible in controlled call centers but still a risk). The sales agent conferences the call to a Payment IVR system for a guided payment collection system. In such a scenario, a customer is on a call with a sales agent at a call center and wishes to make a payment. One of the use of such deliberate clamping is in Credit Card Payment Acceptance systems over phones, or what are also called Payment IVR systems. In deliberate DTMF Clamping, the systems are configured to prevent any DTMF signals to be heard between users of a phone. Beneficial – usually done through the deliberate clamping ĭTMF Clamping depending on where it occurs can be beneficial or harmful. ![]() This concealing of these tones is called DTMF Clamping. However, there is a functionality by which telecom systems hide these signals. ![]() That means, these just go as normal sound waves ( maybe a great mimic could copy and simulate these □ ) on a telephone call. ![]() These tones most often go as in-band signals. In simpler words, these are the beeps or touch-tones that we hear while pressing digits on the keypad of the phone during a connected call on your cell or when we dial using one of the traditional touch-tone phones. Dual Tone Multi-Frequency or DTMF enables phone users to enter their details via telephone keypad.
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