/mcpCall lineOpen for the deviceID of the line that is to be opened. 3. Call lineDevSpecific with a CCiscoLineDevSpecificCTIPortThirdPartyMonitor message in the lpParams parameter. Be aware that this extension is only available if extension version 0x00050000 or higher is negotiated. Note Class Detail class CCiscoLineDevSpecificCTIPortThirdPartyMonitor: public CCiscoLineDevSpecific { public: CCiscoLineDevSpecificCTIPortThirdPartyMonitor () : CCiscoLineDevSpecific(SLDST_CTI_PORT_THIRD_PARTY_MONITOR) {} virtual ~ CCiscoLineDevSpecificCTIPortThirdPartyMonitor () {} virtual DWORD dwSize(void) const {return sizeof(*this)-4;} // subtract out the virtual function table pointer }; Parameters DWORD m_MsgType equals SLDST_CTI_PORT_THIRD_PARTY_MONITOR Send Line Open The CciscoLineDevSpecificSendLineOpen class is used for general delayed open purpose. To use this class, ensure the lineNegotiateExtVersion API is called before opening the line. When calling lineNegotiateExtVersion, ensure the second highest bit is set on both the dwExtLowVersion and dwExtHighVersion parameters. This causes the call to lineOpen to behave differently. The line does not actually open, but waits for a lineDevSpecific call to complete the open with more information. The extra information required is provided in the CciscoLineDevSpecificUserSetSRTPAlgorithmID class. CCiscoLineDevSpecific | +--CciscoLineDevSpecificSendLineOpen Procedure 1. Call lineNegotiateExtVersion for the deviceID of the line that is to be opened. (0x40070000 with the dwExtLowVersion and dwExtHighVersion parameters). 2. Call lineOpen for the deviceID of the line that is to be opened. 3. Call other lineDevSpecific, like CciscoLineDevSpecificUserSetSRTPAlgorithmID message in the lpParams parameter to specify SRTP algorithm IDs. 4. Call lineDevSpecific with either CciscoLineDevSpecificSendLineOpen to trigger the lineopen from TSP side. Cisco Unified TAPI Developers Guide for Cisco Unified Communications Manager, Release 15 and SUs 370 Cisco Device-Specific Extensions Class Detail