Rotary Dial to DTMF

[Art]

Because we don't have a real phone line,
only an emulated phone port to keep old phones working (existing cordless and such) that port is provided by our router.
Our phone given to us by the communications provider is an IP phone.
If we plug a phone directly into the phone line it doesn't do anything.

[Charlie]

Ah yes, VOIP is usually the exception.