The VoIP Service is based on the prioritization of voice packets originated from a toowayTerminal to the Tooway Hub Station. Through Tooway KU, a maximum of 1 simultaneous call is allowed per VoIP account which can make use of the prioritization of the voice packets (Quality of Service). Through Tooway KA-SAT a maximum of 5 simultaneous calls are allowed. The quality of the call on the Inbound Channel is bound to the availability of bandwidth on the involved carriers. Only one call is allowed for each Terminal and is entitles to benefit of the traffic prioritization features.When you make a phone call, the SIP VoIP device will send out its SIP VoIP start signaling message (invite message) to the receiver; The Tooway Terminal will detect it and will issue a request to the Tooway Hub Station to support the transport of voice packets with a specific service flow, which will grant higher priority over other types of traffic. After the request is approved, the Tooway terminal will start forwarding the signaling and will start classifying the voice packets into the newly created flow. On the call termination, the Tooway Terminal will detect once again the relevant SIP signaling message (Bye message, or termination from the server), and will tear down the VoIP service flow. The prioritized VoIP traffic is not taken into account for the computation of the Volume Usage used by the Fair Acces Policy.