Recently helped my parents leave Virgin Media by porting over their landline to a VoIP provider, so now they can switch internet provider without worrying about porting/losing their long-term landline number.
Hardware wise opted for a Grandstream HT801 VoIP Adapter. After some fiddling with the adapter's 90s-looking web UI, we had it all wired up and working.
One interesting thing was that the existing landline phone would now only "ring" once, before pausing and ringing again. Previously it would "ring" twice before the pause/repeat cycle.
This led to a rabbit hole of discovering ringing tones around the world are not uniform, and out of the box the HT801 the ringing tone defaulted to a cadence of 2 seconds on, 4 seconds off (c=2000/4000). I half knew this from having made calls from abroad and hearing a foreign dial tone (both in cadence and frequency/Hz), but never thought I'd one day end up needing to figure out and care about such values.
After stumbling across this site, I found that in the UK we use a cadence of 4 seconds on, 2 seconds off (c=4000/2000). While the default (c=2000/4000) looks to match the cadence of the US.
In the HT-801 web UI, the ring tone cadence can be configured under:
"ADVANCED SETTINGS" > "System Ring Cadence"
For the UK I just needed to set it to c=4000/2000;. Now the landline rings like it used to, and my parents' phone & internet bills are under half of what they used to be.
