1.2 Network Devices and Numbering Plan10 Getting StartedPBX Numbering InformationPBX numbering information is necessary to set up phone numbers for a VoIP network. Set thenumbers conforming to existing PBX numbering systems.Dialling ExamplesThe VoIP network allows you to access the PBX at one location from another to establish: (1) anextension call, or (2) an outside call through the local PSTN as if you are calling from the same area.Calling from Los Angeles to ChicagoTo extension 301 via VoIP networkTo local telephone 123-4567 via VoIP network through local PSTNCalling from Chicago to Los AngelesTo extension 201 via VoIP networkLos AngelesOfficeChicagoOfficeDescriptionPBX Code 35 41A unique number (ranging from 1 to 7 digits)assigned to identify each PBX within anetwork.In this example, for convenience, each PBXcode corresponds to the last portion of theIP address of its card; that is, because theLos Angeles office card has the IP address200.45.11.35, Los Angeles PBX code is 35.TIE Line AccessNumber 7 7 An access number to use the TIE lineservice.PSTN Trunk Number 9 9 An access number to seize a local PSTNtrunk.Extension Number 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.Dial 41.Dial 7. Dial 301.ChicagoPBX codeTIE lineaccess no. extension no.Dial 41. Dial 9.Dial 7. Dial 123-4567.ChicagoPBX codeTIE lineaccess no. phone no.Chicago PBXPSTN trunk no.Dial 35.Dial 7. Dial 201.Los AngelesPBX codeTIE lineaccess no. extension no.
