29.198-04-33GPPOpen Service Access (OSA) Application Programming Interface (API)Part 4: Call controlRelease 9Subpart 3: Multi-party call control Service Capability Feature (SCF)TS
The Multi-Party Call Control API of 3GPP Rel4 relies on the CAMEL Service Environment (CSE). It should be noted that a number of restrictions exist because CAMEL phase 3 supports only two-party calls and no leg based operations. Furthermore application initiated calls are not supported in CAMEL phase 3. The detailed description of the supported methods is given in the chapter 8.