top of page

Dual tone multi frequency

DTMF

​

Digital/TEC definition

of

Dual Tone Multi Frequency

from

Tunstall Healthcare (UK) Ltd

Tunstall

These are the tones that are heard when buttons on a telephone are dialled. These tones are used by telephone networks to send messages over a telephone connection. They are also used by devices such as fax machines, care alarms, burglar alarms and textphones to communicate over ordinary telephone lines. Tunstall's proprietary alarm protocols TTNew/TT92/TT21 all use DTMF as a means of signalling. DTMF specifically sends messages in pairs of tones that are transmitted simultaneously. By comparison, STMF transmits single tones at any one time, this tends to provide a more reliable transmission compared to DTMF. STMF is a proprietary Tunstall technology.

Click here to comment on this definition

If a flag appears next to this message, click on it to see others' comments about this definition

See discussion

​

Synonym of
Not to be confused with
See also
Use instead of
Consider using instead
Parent of
Child of

Comment on definitions of

Dual tone multi frequency

Thanks for submitting!

bottom of page