DTMF is a legacy technology that has successfully bridged the gap between analog and digital telecommunications. Its simplicity and ubiquity ensure it will remain in use for the foreseeable future, particularly in enterprise IVR environments. However, organizations must acknowledge that DTMF transmits sensitive data in cleartext audio. Security protocols (SRTP/TLS) and strict data handling policies regarding call recordings are essential to protect users utilizing DTMF interfaces.
Dialing a 10-digit number took seconds rather than nearly a minute. dtmf key