Sip Trunk E.164 Support - NEC SL1000 Features And Specifications Manual

SL1000/SL1100 ISSUE 2.0

SIP Trunk E.164 Support

(This feature is for V2.0 or higher)
Description
With the 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.
S
For example a normal international SIP call could be dialed and presented from the system as follows;
Number dialed = 00441202223344
Request-URI: Invite sip:00441202223344@172.16.18.100 SIP/2.0
However 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/2.0
This 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 format
accordingly.
Below is the full list of SIP header fields used by this feature:
Request-URI
To
From
P-Asserted Identity
P-Preferred Identity
Conditions
• E.164 support is applied on the SIP trunk interface.
• E.164 is supported for all carrier choices (PRG 10-29-14).
Default Settings
Disabled
System Availability
Trunks
IP SIP
Required Component(s)
• VoIPDB C1
• IP Trunk License
1-638 SIP Trunk E.164 Support