NEC SL2100 Features And Specifications Manual page 524

SL2100 ISSUE 1.0
Voice Band Data (VBD) is what is called modem over IP. This feature enables use of VBD (Voice Band
Data) by System. If use VBD. Analog modem signal is converted into voice band data and can be
submitted via SIP Trunk.
For a list of vendors that have successfully completed interoperability certification go to http://
www.necntac.com and refer to Technical Documentation.
SIP Trunk E.164 Support
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.
For example a normal international SIP call could be dialed and presented from the system as follows;
I
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-URIToFromP-Asserted IdentityP-Preferred Identity
SIP Trunk E.164 CLIP Enhancement
With the SIP Trunk E.164 CLIP Enhancement enabled, when an incoming SIP call from an external
ITSP is presented at the system with a "+" in the From header field as the international access code, it
is recognized and displayed as an international call at the terminal display and also logged in the
terminals incoming caller history, allowing any outbound calls made from a multiline terminals caller
history possible using this numbering scheme.
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.
FAX path through mode
When SIP Carrier does not support the T.38 Fax relay function, FAX relay can be established using
FAX Path through mode via SIP trunk.
SIP Multi Profile Support
With the SL2100 you can have six SIP Profiles allowing you to connect to six different SIP Carriers, or
allow you to have a SIP System Interconnection and connection to a SIP Carrier.
Conditions
• A maximum of 64 IP Trunks are supported in the SL2100.
• The SL2100 can support six SIP profiles. Multiple carriers or SIP System can be used at the same
time.
• A SIP profile is set to each SIP trunk in Program 14-18-05.
• Calling Party Name is not provided for outgoing calls on SIP trunks.
• E.164 is supported for all carrier choices (PRG 10-29-14).
• E.164 CLIP feature is only possible from Multiline Terminal.
• If VAD is Enable, RTP forwarding (PRG 10-26-02) is not running.
• PRG 84-13-65 applies to system not by each codec.
1-510 IP Trunk - (SIP) Session Initiation Protocol