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SIP Stack Architecture

The SIP stack supports:
- 4 types of transactions process
- 3 types of dialog process
- ABNF Codec control
- Headers and parms processing
- Core processing
- Primitive interfaces
- Multi-upper-user support

SIP stack only uses 3 threads:
- Transaction, Dialog, Session & Call
- ZOS & QTimer
- TPT (Transport)

SIP CP & MSF

We provide CP module for guiding customer to develop their own application easier and faster. The CP is not a SIP stack module, it's mechanism compliers with Q.931 of ITU-T. And we would extend CP, and make it much more various standard interfaces. The next version of CP would be MSF.

Session Control (SC) - provides the capability to create, tear down and modify existing communications sessions for all media types.

Call Processing Language (CPL) - provides CPL storage and execution capabilities, enabling developers to deploy user-profiling services such as call forwarding and find-me-follow-me.

Application Event Logging (AEL) - enables logging of application context sensitive information for accounting, fault or performance management purposes.

IVR Control (IVR) - provides developers access to IVR capabilities within applications.

Sipping Service (SS) - Call Forwarding, SIP Registration, Presence Management, Instant Messaging, Conferencing and etc..

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