Pulse dialing to DTMF converter¶

Most modern analog telephone adapter/FXS interfaces do not support pulse dialing (or 'loop disconnect dialing') anymore. There are some exceptions, such as the Cisco VG224 and the Grandstream HT801.

However, there are various PCBs that can convert the pulses to DTMF signaling, without modifying the phone itself.

This is a list you can use for building your own:

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