IP Network-to-Network Interface (NNI) Standard for VoIP
|Publication Date:||1 May 2006|
SCOPE, PURPOSE, AND APPLICATION
This standard defines the IP Network-to -Network Interface (NNI) for VoIP between carriers. It addresses the need for a standard interface as telecom networks migrate the NNI from TDM circuitswitched to IP. The focus of this standard is to support VoIP. This standard defines:
? Interconnection architecture;
? SIP call/session control signaling;
? Signaling and media transport;
? Quality of Service (QoS);
? Association between call control and media control; and
? Mandatory SIP URIs to be Supported.
There is also an informative annex on items for consideration in SLAs.
The following related topics are not defined in this document:
? Call Routing;
? Session Border Controller Functions; or
? Call Admission Control and Traffic Management.
Figure 1 illustrates the relationship of this document to other related IP-NNI documents.