Extensible phone systems
You can add a new phone at any time - and choose from a wide range of manufacturers. You can even use certain mobile phones as your office phone with no cost calls whenever they are in reach of a suitable WiFi service.
You can choose how to route external calls - for example international call minutes can be purchased at a significant discount to the standard BT rate.
You can choose how to route incoming calls. This can vary on the time of day or whether it is a holiday. Calls can go to a dedicated receptionist first, for example, before being passed to a group of people should the receptionist be busy or unavailable.
Incoming calls can also be routed via a VoIP gateway, allowing, say 10 simultaneous calls down a standard broadand line. This can be a very cost-effective answer for coping with seasonal peaks in demand.