Networking Manual 7 - 17 SIP TrunkingSIP TrunkingSECTION 1 VO IPVoIP (Voice over Internet Protocol or Voice over IP) allows the delivery ofvoice information using the Internet protocol (sending data over theInternet using an IP address). This means that digital voice informationcan be sent in packets over the Internet rather than using the traditionalpublic switch telephone network (CO lines). A major advantage of VoIP isthat it avoids the tolls charged by ordinary telephone service.Using VoIP equipment at a gateway (a network point that acts as anentrance to another network), the packetized voice transmissions fromusers in the company are received and routed to other parts of thecompany intranet (local area or wide area network) or they can be sentover the Internet using CO lines to another gateway. 1SECTION 2 IP N ETWORKINGIP Networking uses VoIP technology to connect two or more telephonesystems together. This allows calls to be made between sites withoutusing the public telephone network. This can save money and makecommunication between sites much easier.The following Networking modes are available on the NEC SL1100system: SIP TIE lines SIP Trunks (to a SIP Trunk Provider)1. The voice quality of VoIP depends on variables such as available bandwidth, network latency andQuality of Service (QoS) initiatives, all of which are controlled by the network and Internet ServiceProviders. Because these variables are not in NEC control, it cannot guarantee the performance of theuser’s IP-based remote voice solution. Therefore, NEC recommends connecting VoIP equipmentthrough a local area network using a Private IP address.
