Used to run 4x analogue lines, but had to move office. New place on a different exchange so would have to change the numbers - disaster. However, simple to port existing numbers to VoIP
Offset the money saved on lines on a biz grade connection (EFM) and gone for hosted VoIP with a load of Yealink handsets (They're cool - can do API stuff with them as well to link with CMS)
+ As many outgoings and incomings as I want, great as we grow
+ Simple, Web panel for call groups, IVR, etc etc
+ Easy to add DDIs for marketeers etc
+ Better Internet for the company as a whole (10Mb up and down, uncontended and unmetered)
+ Great DR as if we lose the office, can carry on from any internet connection.
+ Part timer/home worker carries on as if at her desk
+ No BT involvement, not even their copper
+ Actually, the last deserves many more +++s ++++++++^29
- Lose the 'net, lose everything
- EFM is chuffin pricey, but offset by not having the copper and *is* on a 6hr SLA
- Lost the fax and no easy way to plug the alarm in with an autodialer
- Outgoings are a tad more expensive, but we don't do too much of that
That's about it, tbh. We're a rural biz in a small market town; experience has been uniformly good for the last 3 years+
No advert and no connection, but our provider is Dial9 and they've been brilliant and wouldn't hesitate to recommend them.