UPDF Example

In the following example, the objective is to tunnel SS7 signaling information from one Signaling Point to another via Ethernet. SIP envelops all SS7 ISUP messages in MIME encoded SDP.

The CSP can handle this scenario because it supports traditional PSTN protocols and VoIP protocols such as SIP.

In this network, you can configure SS7 channels on the CSP to report incoming SS7 ISUP calls to either:

In either case, you should configure the NPDI Interworking on the SS7 channels on the CSP #1. This way, if a call is reported to the host, the RFS will have UPDF TLVs.

• Examine the Request for Service message and determine that it is an SS7 ISUP call.

• Issue a Route Control message that will have all pertinent UPDF TLVs related to SS7 ISUP parameters so that all those TLVs can carry MIME encoded DSP in the Invite message

The following sample Request for Service message for an incoming call assumes NPDI Interworking is enabled on SS7 channels.

The host needs to issue a Route Control message that embeds all of the TLVs required for this RFS. The UPDF tunneled Invite message goes out to the other CSP.

See Signaling System Number Seven.

The protocol used in most local area PC networks. Typically, most Ethernet networks support data transmission speeds up to 10 Mbps, but 100 Mbps is also possible.

Session-Initiation Protocol. A signaling protocol used for establishing sessions in an IP network. A session could be a simple, two-way telephone call, or it could be a collaborative multi-media conference session.

See Integrated Services Digital Network User Part.

Public Switched Telephone Network

Voice over Internet Protocol. The delivery of voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public-switched telephone network (PSTN).

Call processing layer of the CSP.

Network Protocol Data Intelligence. Also called “Interworking,” it is a software product that operates within Excel’s Call Control (Layer 4) and Services (Layer 5) call processing layers. NPDI is meant to enhance Excel’s call processing product offering by allowing call processing layers (specifically Layers 4 and 5) to perform advanced analysis, generation, and conversion of Network Signaling (NS) Layer 3 information.

Interworking is a software feature within the Excel platform call control layer that enables protocol conversion by analyzing and converting Network Signaling (NS) Layer 3 information.

See Request For Service.

See Universal Protocol Data Format.

Digital Signal Processor

Real-Time Transport Protocol. Supports transport of real-time data like interactive voice and video over packet-switched networks.