Progress has been slow but now I have the first revision of my modular analog PBX back plane PCB in my hands! ☎️

This board has eight line card slots for either FXS or FXO interfaces and three generic expansion slots, ring generator using an H-bridge plus external step-up transformer, progress tones, DTMF decoder (and pulse dialing of course), four simultaneous calls with balanced audio paths. Now I can finally hook up my modems without messing with VoIP! #pbx #retrocomputing #pcbway

A crash course learning how #FusionPBX works later and I can safely say this is a very good option if wanting to move away from #3CX

Lots more fiddly, much more advanced, but once you get it you'll have learned a lot more about how #PBX's work and be confident with it.

I don't even need the apparently fake SBC (on an rPi) 3CX say I should have - phones are working without it, secured and operational behind NAT . admittedly, I do have IPv6 one some phones that support it so NAT traversal isn't an issue anyway, but still, one more box I can unplug.