Siemens OpenStage 60

The above would appear to be a Voip phone. Anyone know anything
about it and specifically will it work standalone on my Voip line
or does it need to be connected to a switch?

I've just seen four, used but in nearly new condition, at a very
good price.

 

There were four for sale, boxed up like knew at £39 apiece. It
looked a good buy for a domestic voip phone if it would do the
job.

I'll go buy one next week and report progress - or come asking
for help!

 

The boxes are very clearly printed SIP on the outside, else I
wouldn't even have given it a thought.