If you are using VoIP telephones, you can have multiple extensions in your VoiceHost account. You can configure preferences for each phone from the VoiceHost control panel.

You can have a direct line number to each handset or have one number call all phones. You can even transfer calls between phones and make calls between extensions easily.

If you are using analogue phones with a VoIP adapter you can plug in multiple phones to a maximum of 3 ren. If you have a DECT system, you may be able to connect more phones.