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 58 page image

A1 VoIP Requirements58 Getting StartedAre layer 2 or higher switches used?Use of repeater hubs can increase the network load, and therefore may result in degradationin speech quality.To ensure the performance, it is strongly recommended that you use layer 2 or higher switches.Are category 5 (CAT 5) cables used?When connecting network devices, make sure to use CAT 5 cables. If other types of cables areused, communications may not be carried out normally.A1.4 QoS (Quality of Service)Some routers permit the configuration of priority control features. This allows the router to givehigher priority to voice packets and lower the rate of loss and delays during transmissions,hence improving speech quality. It is strongly recommended that you use this feature,especially in networks where traffic is heavy.Typically, a router identifies what packets to pass in priority by checking the value in the ToSfield of the header of IP packets. The VoIP Gateway Card has the ability to set the ToS field ofoutgoing voice packets (see "2.2.3 Voice Communication Parameters" in the VoIP GatewayCard Programming Guide). When the card is appropriately configured, the router can givevoice packets from the card higher priority.Consult your network administrator when setting the ToS field, as the setting value mustconform to the router’s specifications.NoteSome switches also permit the configuration of priority control features. For moreinformation, consult your network administrator.*2 For the actual setting values, refer to "2.2.1 Network Parameters" in the VoIP GatewayCard Programming Guide.