SIP Tunneling

SIP tunneling is a mechanism that transports any kind of data using SIP signaling messages.

The CSP SIP stack now supports tunneling with the host playing an important role.

The SIP stack acts as a "black box" and the host determines what data to tunnel and what format to transport.

Important! SIP tunneling is a proprietary feature that works between CSP's only.

1. The CSP reports the IAM from the network to the host as SS7 ICBs within the Request for Service with Data (0x002D) message.

2. The received ICBs are provided to the SIP stack using the Outseize Control or Route Control API messages and Subsequent PPL Event Request (0x023). The message is embedded within the SIP INVITE message as MIME data and sent through the IP network.

3. The CSP UAC receiving the SIP INVITE message reports the MIME data to the host with the RFS.

4. The host can use this SS7 ICB received from the INVITE message to make an outbound SS7 call with appropriate parameters.

Similarly for other SS7 messages, a SIP message is used to tunnel it through the IP network.

• PPL Event Request 0x0022 in PPL Component 0x00A7 generates 181 Call is Being Forwarded

• PPL Event Indication in PPL Component 0x00A7 reports the receipt of 181 response.

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

Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.

See Signaling System Number Seven.

Outgoing call setup during real-time call processing on a specific channel.

See Programmable Protocol Language.

See Request For Service.

See Information Control Block.

A condition that, when met, drives a state machine from one state to another. A condition that drives a Component out of its current state by invoking an associated primitive.

A programmable software component that uses PPL state machines that can be modified with the PPL Tool.