The VoIP gateways we were installing a few years ago still supported pulse dialing on the FXS lines. Those gateways supported all sorts of archaic and arcane POTS features. All the classic feature codes (like *69) had support. I think it could be set up to emulate a DMS-100 or a 5Ess as well.
If you have a copper landline from your local telephone company, I'm willing to bet it still supports pulse dialing? Maybe it's 50/50 now?