Connect it to a an FXS/ATA and make it a voip phone? I have, agmonst others, a candlestick phone from the 1920's still functional using this.
It would be great to hack together a 1920's style AI operator to put the calls through for you.
I'd have had no problem with pocket if it'd been an optional plugin. Or, if it'd been optional at all. If I wanted to go around disabling a bunch of browser bloat, I wouldn't be using Firefox.