/mcpLINE_LINEDEVSTATE The TAPI LINE_LINEDEVSTATE message gets sent when the state of a line device changes. The application can invoke lineGetLineDevStatus to determine the new status of the line. Function Details LINE_LINEDEVSTATE hDevice = (DWORD) hLine; dwCallbackInstance = (DWORD) hCallback; dwParam1 = (DWORD) DeviceState; dwParam2 = (DWORD) DeviceStateDetail1; dwParam3 = (DWORD) DeviceStateDetail2; Parameters hDevice A handle to the line device. This parameter is NULL when dwParam1 is LINEDEVSTATE_REINIT. dwCallbackInstance The callback instance that is supplied when the line is opened. If the dwParam1 parameter is LINEDEVSTATE_REINIT, the dwCallbackInstance parameter is not valid and is set to zero. dwParam1 The line device status item that changed. The parameter can be one or more of the LINEDEVSTATE_constants. LINEDEVSTATE_OUTOFSERVICE Indicates the line device unregisters as it enters Energywise DeepSleep/PowersavePlus mode dwParam2 The interpretation of this parameter depends on the value of dwParam1. If dwParam1 is LINEDEVSTATE_RINGING, dwParam2 contains the ring mode with which the switch instructs the line to ring. Valid ring modes include numbers in the range one to dwNumRingModes, where dwNumRingModes specifies a line device capability. If dwParam1 is LINEDEVSTATE_REINIT, and TAPI issued the message as a result of translation of a new API message into a REINIT message, dwParam2 contains the dwMsg parameter of the original message (for example, LINE_CREATE or LINE_LINEDEVSTATE). If dwParam2 is zero, this indicates that the REINIT message represents a real REINIT message that requires the application to call lineShutdown at its earliest convenience. If dw Param1 is LINEDEVSTATE_OUTOFSERVICE, dwParam2 contains the reason EnergyWisePowerSavePlus when the line device unregisters as it enters EnergywiseDeepSleep. dwParam3 The interpretation of this parameter depends on the value of dwParam1. If dwParam1 is LINEDEVSTATE_RINGING, dwParam3 contains the ring count for this ring event. The ring count starts at zero. If dwParam1 is LINEDEVSTATE_REINIT, and TAPI issued the message as a result of translation of a new API message into a REINIT message, dwParam3 contains the dwParam1 parameter of the original message (for example, LINEDEVSTATE_TRANSLATECHANGE or some other Cisco Unified TAPI Developers Guide for Cisco Unified Communications Manager, Release 15 and SUs 212 Basic TAPI Implementation LINE_LINEDEVSTATE