B1 Extension Number MethodGetting Started 63B1.2 Numbering Plan ExampleIP Addressing InformationThe following table is a duplication of the table used for the PBX code method.PBX Numbering InformationThe following table contains "VoIP Gateway Trunk (CO Line) Access Number", instead of "PBXCode" and "TIE Line Access Number" as used in the PBX code method.Los AngelesOfficeChicagoOfficeDescriptionCard IPAddress 200.45.11.35 199.176.64.41Identifies the location of each VoIP GatewayCard in the network during VoIPcommunications. A unique IP address mustbe assigned to each card.DefaultGatewayAddress200.45.11.1 199.176.64.1Identifies the IP address of the primarygateway (typically a router or similar device)that exchanges IP packets with the othergateways on the VoIP network.Subnet MaskAddress 255.255.255.0 255.255.255.0Defines which digits of an IP address areused for the network address and the hostaddress at each network location. A card IPaddress must fall within the same subnet asthat of the default gateway (e.g., router) thatis connected to the card.Los AngelesOfficeChicagoOfficeDescriptionVoIP GatewayTrunk (COLine) AccessNumber802 803 An access number to seize a VoIP gatewaytrunk (CO line).PSTN Trunk(CO Line)Number92 93 An access number to seize a local PSTNtrunk (CO line).ExtensionNumber 200 to 299 300 to 399 A number assigned to each extension.Fax ExtensionNumber 500 to 599 600 to 699 A number assigned to each fax extension.