A telecommunication network 30 for telecommunications between telecommunication end point devices 36,37,38, such as telephones or video phones, the telecommunication network 30 comprising a plurality of telecommunication device control systems 40 implemented by a computer system. Each telecommunication device control system 40 is shared by telecommunication end point devices 36,37,38 allocated to it and is configured to control communication connections involving telecommunications originating from telecommunication end point devices 36,37,38 allocated to it and other telecommunication end point devices. At least some functionality of the plurality of telecommunication device control systems 40 is shared by at least some parts of the computer system.