Panasonic KX-TDA0480 Getting Started Manual

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1.2 Network Devices and Numbering Plan6 Getting StartedNotes• Recommended IP Networks: the IP Gateway Card's quality of performance dependson the type of network in use. For instance, transmission delays due to congestion onthe network and inadequate service characteristics of Internet Service Provider (ISP)can both contribute to loss in voice communications. Manageable networks (e.g., LAN)in which static *1 IP addresses can be used provide better quality of service compared tounmanageable networks such as the Internet.• Firewalls: a firewall protects the internal networks of an organisation againstunauthorised penetration from outside. However, routing a VoIP network through afirewall may cause performance degradation. Check with your network administrator ofthe existence of firewall.1.2.1 Numbering Plan ExampleThis section describes the network numbering mechanism based on the previous examplediagramme. Please configure your network referring to this example.IP Addressing InformationIP addressing information is typically supplied by a network administrator. Consult yournetwork administrator for specific values.*1 Dynamic IP addressing (using DHCP/BOOTP) is not supported.Description Los AngelsOfficeChicagoOfficeGateway IPAddressThe Gateway IP address identifies thelocation of each unit in the network duringVoIP communications. A unique IP addressmust be assigned to each unit.200.45.11.35 199.176.64.41Route IPAddress(Firewall orRouter)When the IP Gateway Card is routedthrough a firewall, the internal IP address offirewall becomes the Gateway address to beassociated with the IP Gateway Cardinstead of the router IP address.200.45.11.1 199.176.64.1Subnet MaskAddressEach network location has a subnet maskaddress that helps to define which digits ofan IP address are used for the networkaddress and the host address. EachGateway IP addresse must fall within thesame subnet as that of the router shared bythe units.255.255.255.0(default)255.255.255.0(default)