One of N510IP I took for my boss's office in operation, here are two additional telephone numbers directly via a SIP provider and are only intended to provide additional incoming lines for customers.
The device worked for me in about 5 minutes, incl. The forward on busy on the main telephone number.
Is encouraging that there is even a setup wizard for various SIP provider.
The second N510IP I took with me behind a Auerswald Compact 5020 VoIP in operation, here took the configuration a little longer - but worked well right away. This runs now about 2 years with no problems.
Anyone who thinks that IP phones can be as easy as DECT phones into operation, you are wrong.
Here already heard some knowledge to the fact that you can take the base station into operation.
In recent months I have often given help with start-up to IP phones because some people only look at but do not pay attention whether they are technically so rightly.
Also you should definitely pay attention to the compatibility of handsets. Gigaset has it specially presented below: [...] - because not everything that is called DECT is compatible with each other!