UNIVERGE SV8100
System Availability
Terminals
All Multiline Terminals
Required Component(s)
None
SIP Trunk E.164 Support
Description
With SIP Trunk E.164 Support enabled, the PBX is able to support SIP configurations where the number
presentation within the SIP messages is formatted using the E.164 international numbering scheme.
Specifically the system is able to handle the + digit when required as the International Access Code.
For example, a normal international SIP call can be dialed and displayed as follows:
Number dialed = 00441202223344
Request-URI: Invite sip: 00441202223344@172.16.18.100 SIP/2.0
With 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/2.0
This display is a requirement of certain SIP ITSPs (Internet Telephony Service Providers) and may
require that PBX handle these calls and modify any SIP messages to the correct format accordingly.
This feature uses the following SIP header fields:
Request-URI
To
From
P-Asserted Identity
P-Preferred Identity
IP Trunk – (SIP) Session Initiation Protocol
Issue 12.0
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