TIL that apparently DMTF (service related to pressing a keypad during a phone call to choose an option) does not work over non-cellular calls (Voice over wireless LAN, short VoWLAN or also VoWi-Fi)

@peterbabic That doesn’t sound right. You should be able to send any DTMF tones over any VOIP connection. I’ve done it myself, and it makes no difference whether the VOIP is hard-wired or over wifi.

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