3Com® VCX V7111 VoIP Gateway User Guide 1156 Configure the Phone Context table according to Table 30.7 Click the Submit button to save your changes.8 To save the changes so they are available after a power fail, see Saving Configuration.Several rows with the same NPI-TON or Phone-Context are allowed. In such a scenario, a Tel-to-IP call uses the first match.Phone-Context '+' is a unique case as it doesn't appear in the Request-URI as a Phone-Contextparameter. Instead, it is added as a prefix to the phone number. The '+' isn't removed from thephone number in the IP-to-Tel direction.Table 30 Phone-Context ParametersParameter DescriptionAdd Phone Context As Prefix[AddPhoneContextAsPrefix]Determines whether or not the received Phone-Context parameter is added as aprefix to the outgoing ISDN SETUP Called and Calling numbers.Valid options include:0 = Disable (default).1 = Enable.NPI Select the Number Plan assigned to this entry.You can select the following:0 = Unknown (default)1 = E.164 Public9 = PrivateTON Select the Number Type assigned to this entry. If you selected Unknown as the NPI, you can select Unknown (0) If you selected Private as the NPI, you can select Unknown (0), Level 2Regional (1), Level 1 Regional (2), PSTN Specific (3), or Level 0 Regional(Local) (4). If you selected E.164 Public as the NPI, you can select Unknown (0),International (1), National (2), Network Specific (3), Subscriber (4), orAbbreviated (6).Phone Context The Phone-Context SIP URI parameter.Configuring the Routing TablesUse this submenu to configure the gateways IPÆTel and TelÆIP routing tables and theirassociated parameters.General ParametersUse this screen to configure the gateways IPÆTel and TelÆIP routing parameters.To configure the general parameters under Routing Tables:1 Open the General Parameters screen (Protocol Management menu > Routing Tablessubmenu > General option); the General Parameters screen is displayed.
