VoIP telephony routes calls over the internet instead of the traditional phone network, which cuts call costs - especially for international calls and offices with many employees. The category includes desktop IP phones, adapters that connect analogue handsets to an internet line, and equipment for building a company phone system. Desk phones differ in the number of supported lines, display type and programmable keys; models with a headset port suit call centres well. Before buying, confirm SIP protocol support and compatibility with your PBX or virtual telephony operator.
