SIP Trunk E.164 Support(This feature is for V2.0 or higher)DescriptionWith the SIP Trunk E.164 Support enabled the PBX is able to support SIP configurations where thenumber presentation within the SIP messages is formatted using the E.164 international numberingscheme. Specifically the system is able to handle the ‘+’ digit when required as the InternationalAccess Code.For example a normal international SIP call could be dialed and presented from the system as follows;Number dialed = 00441202223344Request-URI: Invite sip:00441202223344@172.16.18.100 SIP/2.0However with SIP Trunk E.164 Support enabled the SIP call could be presented once dialed as below;Request-URI: Invite sip:+441202223344@172.16.18.100 SIP/2.0This presentation can be a requirement of certain SIP ITSPs (Internet Telephony Service Providers)so it is necessary the PBX can handle these calls and modify any SIP messages to the correct formataccordingly.Below is the full list of SIP header fields used by this feature:Request-URIToFromP-Asserted IdentityP-Preferred IdentityConditions• E.164 support is applied on the SIP trunk interface.• E.164 is supported for all carrier choices (PRG 10-29-14).• SL Net multi-carrier support will apply E.164 support across all carrier configurations at secondarynodes.Default SettingsDisabledSystem AvailabilityTrunksIP SIPRequired Component(s)• VoIPDB C1SL1100 ISSUE 2.01-676 SIP Trunk E.164 SupportS
