scope:

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;

? Security;

? 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.