Recommended DTMF setting in Europe?

FreePBX Providers
1

Hello everyone,

We have a FreePBX 15 + Asterisk 16 + OVH trunk install, combined with Yealink T4 series phones. Sometimes DTMF works (press 1 for this / press 2 for that); sometimes it just doesn’t and we need to modify the DTMF Type setting in the Yealinks to pick the one that would work, on a trial and error basis. Eventually, we always get it to work but this is a fastidious, never-ending process.

Is there a recommended combination of DTMF settings on FreePBX + Yealinks that would work across the board in Western Europe?

Thanks,
Fred

2

Generally, throughout the whole world, for SIP, the correct starting point is rfc4733 (sometimes known by the old name rfc2833). Every competent provide should support that.

3

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