DTMF Dual Tone Multi-Frequency
DTMF is used in ham radio in applications such as IRLP and Echolink, as a means to dial outside numbers via phone patch and as a means for repeater owners to configure the system remotely. It is sometimes known as tone dialing and allows the user to send a series of tones that activate or disable a remote repeater or service.
Why DTMF?
The DTMF system was developed to encompass as wide a range of potential signals as possible. In practice today, most hams will only use numerical combinations. For example, to open IRLP 6556, the operator will press the talk button on the microphone and then press the digits 6556 also on the microphone.
Each letter and number is allocated a pair of tones, a high tone and a low tone, using the same DTMF frequencies as on telephone landlines.
The following table shows the pairs of signals used for the digits 0 – 9, letters A – D and characters * and #
| 1209 Hz | 1336 Hz | 1477 Hz | 1633 Hz | |
|---|---|---|---|---|
| 697 Hz | 1 | 2 | 3 | A |
| 770 Hz | 4 | 5 | 6 | B |
| 852 Hz | 7 | 8 | 9 | C |
| 941 Hz | * | 0 | # | D |
What dtmf setting do I use on menu of uv-82hp hand held to connect to echolink
Off
Dt-st
Ani-st. Or
Dt-ani
???
Thanks
KB9GIZ
SCOTT
I would initially set WRCQ1. If that doesn’t work try 99BQDF. One of these will certainky work.
73’s
I’m still new to HAM and my Radioddity GA-510 has this feature and I just don’t u derstand. I’ve been reading alot about DTMF but not sure how it’s used unless it was for a group instead of individuals just like me.
And how about as a prepper during disasters, is it useful then?