dual-tone multifrequency

dual-tone multifrequency

[′dü·əl ‚tōn ‚məl·tē′frē·kwən·sē]
(communications)
Signaling method employing set combinations of two specific frequencies used by subscribers and telephone private branch exchange attendants, if their switchboard positions are so equipped, to indicate telephone address digits, precedence ranks, and end of signaling.
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References in periodicals archive ?
Microsoft Speech Server reduce s the complexity and cost of building, deploying and maintaining dual-tone multifrequency (DTMF) and speech-enabled applications for customer self-service and outbound notification.
Microsoft Speech Server reduces the complexity and cost of building, deploying and maintaining dual-tone multifrequency (DTMF) and speech-enabled applications for customer self-service and outbound notification.
With ThruFax, companies will find an economical and reliable fax-routing method other than direct inward dial (DID) or dual-tone multifrequency (DTMF), more costly alternatives.

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