3. Dial the extension number or press a DSS key of a telephone in a Conference call.If an error tone is heard, Barge-In is disable for the extension and the call cannot go through. Retrievethe call by pressing the flashing line Key or hang up and the call recalls the extension.When the call is transferred into the Conference, an intrusion tone is heard by all parties in theconference, depending on the entries in PRG 20-13-17 and PRG 80-01, and all display MultilineTerminals show the joined party.To cancel the transfer, press the flashing line Key to retrieve the call.4. Hang up.SECTION 8 SIP TRUNK E.164 CLIP ENHANCEMENT8.1 DescriptionWith 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 International AccessCode.For example, a normal international SIP call can be dialed and displayed as follows:Number dialed = 00441202223344Request-URI: Invite sip: 00441202223344@172.16.18.100 SIP/2.0With SIP Trunk E.164 Support enabled, the SIP call can be displayed once dialed as:Request-URI: Invite sip:+441202223344@172.16.18.100 SIP/2.0This display is a requirement of certain SIP ITSPs (Internet Telephony Service Providers) and mayrequire that PBX handle these calls and modify any SIP messages to the correct format accordingly.This feature uses the following SIP header fields:ToFromP-Asserted IdentityP-Preferred Identity8.1.1 Condition• E.164 support is applied on the SIP trunk interface.• E.164 is supported for all carrier choices (Program 10-29-14).• Netlink multi-carrier support uses E.164 support across all carrier configurations at the secondarynodes.8.1.2 Default SettingsDisabledISSUE 1.0 SL2100Networking Manual 7-19
