B1 Extension Number MethodGetting Started 59B1.2 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 "PBX Code"and "TIE Line Access Number" as used in the PBX code method.Los AngelesOfficeChicagoOfficeDescriptionCard IP Address 200.45.11.35 199.176.64.41Identifies the location of each VoIP GatewayCard in the network during VoIPcommunications. A unique IP address must beassigned to each card.Default GatewayAddress 200.45.11.1 199.176.64.1Identifies the IP address of the primary gateway(typically a router or similar device) thatexchanges IP packets with the other gatewayson the VoIP network.Subnet MaskAddress 255.255.255.0 255.255.255.0Defines which digits of an IP address are usedfor the network address and the host address ateach network location. A card IP address mustfall within the same subnet as that of the defaultgateway (e.g., router) that is connected to thecard.Los AngelesOfficeChicagoOfficeDescriptionVoIP GatewayTrunk (CO Line)Access Number802 803 An access number to seize a VoIP gatewaytrunk (CO line).PSTN Trunk (COLine) Number 92 93 An access number to seize a local PSTN trunk(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.