I had read elsewhere, a warning about updated software.
The possibility that something changes and no longer works.
In my case that would be responding to rotary pulse dialing.
“If it ain’t broke, don’t fix it.”
And it’s not just the HT502, I have three different Cisco ATAs, and guess what, they won’t do two lines either.
Either with the “default” config or with as found on the web “Do this and it works.” It doesn’t.
My “man cave” is at the other end of a Ubiquiti 5 GHz link, so I use Digium D-40 phones.
But I have three analog phones.
A 1919 Strowger candlestick, a Crosley reproduction pay phone, and an HP 8610 FAX machine.
So, there was a simple solution that’s been working quite well for the past two months.
The HT-502 for the rotary phone, and two of the Ciscos for the pay phone and FAX.
The problem with forums is there is always one “expert” that insists on giving half answers, then when you ask for a clarification determines you’re too stupid to help and says things like “I’m not going to do your work for you.”
Yeah, real helpful.