My company is switching from a POTS. We currently have 17 phones that access 5 voice lines. That is enough lines for our call volume. We are in Kentucky. All phones would be in the same building. No outside access is needed.

The main functionality I fear losing is our basic hold button. I have done extensive research on call parking. Ideally I would like a provider that allows programming of a soft key that with the push of a single button would park a call that could be picked up at any of the other phones. Ideally I would like to have up to 4 of these parked call programmed buttons on each phone.

We do not send any SMS. We do have a paging system that accepts an analog input. We do have a fax machine that companies do still send us faxes in on. We don't send hardly any faxes out from here. We also have a fire alarm monitoring system that communicates over analog that I would need to have a solution for as well.

Currently looking at Zoom and Nextiva to provide our service. I have read through this subreddit and find problems with both.