VoIP-gateways can have different capacity (Voip UK number of telephone interfaces), different design (desktop design, or in 19 "rack) and power supply (internal or external Skype hardware).
VoIP-gateway typically has a built in router that supports a wide range of routing protocols, authentication of users with the ability to automatically obtain and distribute IP-addresses (as a server and a client VoIP Austria), set priorities for different types of traffic (QoS, Quality of Service) and having sufficient set of features bandwidth management, network security, accounting / traffic analysis and administration Digium hardware.
