Panasonic KX-TDA0484 Getting Started

Also see for KX-TDA0480: Getting started guide Installation manual Getting started

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Panasonic KX-TDA0484 Getting Started Manual pdf 53 page image

A1 VoIP RequirementsGetting Started 53Required Bandwidth for Fax CommunicationVia LANVia WAN (PPP: Point-to-Point Protocol)ExampleConsider the following case as an example:• Communication: via LAN• No. of Fax Machines: 1• Required Bandwidth for Fax Communication: 75.6 kbps• Required Bandwidth for Voice Communication: 23.5 kbpsIn this case, the required bandwidth will be as follows:Therefore, inform your network administrator and make sure that the network can support abandwidth of 146.1 kbps even when the network is under conditions of maximum traffic.NoteIt is recommended that all VoIP Gateway Cards in a VoIP network have the same packetsending interval.A1.2 Network ConfigurationYou must evaluate the structure of the existing network to see if a VoIP network can beimplemented. Below are the points that should be taken into your evaluation.Is the IP network a managed network?A VoIP network should be implemented on a managed IP network such as Frame Relay,Leased Line, or IP-VPN (Virtual Private Network).An unmanaged network—that is, the Internet—cannot be used to employ a VoIP networkbecause delays and loss in data transmission can cause huge degradation in speech quality.FAX High Reliable Method G.711 Packet Sending Interval20 ms 30 ms 40 msDon’t Use 87.2 kbps 79.5 kbps 75.6 kbpsUse 224.8 kbps 213.9 kbps 208.4 kbpsFAX High Reliable Method G.711 Packet Sending Interval20 ms 30 ms 40 msDon’t Use 84 kbps 77.3 kbps 74 kbpsUse 221.6 kbps 211.7 kbps 206.8 kbpsRequired Bandwidth= (1 × 75.6) + (3 × 23.5)= 146.1