This list describes all CSTA methods and events supported by estos uaCSTA Server for SIP Phones. After the server has been added as a proxy for CSTA messages, the telephone must actually support the feature. The features supported by the telephones will be described under Prerequisites.
| CSTA Area | CSTA Methods / Events | Service | Event | 
|---|---|---|---|
| Capability Exchange Services / Events: | |||
| GetLogicalDeviceInformation | X | ||
| GetPhysicalDeviceInformation | X | ||
| GetSwitchingFunctionDevices | X | ||
| SwitchingFunctionDevices | X | ||
| System Services / Events: | |||
| SystemRegister | X | ||
| SystemRegisterAbort | X | ||
| SystemRegisterCancel | X | ||
| RequestSystemStatus | X | ||
| SwFunctionDevicesChanged | X | ||
| Monitoring Services: | |||
| MonitorStart | X | ||
| MonitorStop | X | X | |
| SnapShot Services: | |||
| SnapshotDevice | X | ||
| SnapshotCall | X | ||
| Call Control Services / Events: | |||
| AlternateCall | X | ||
| AnswerCall | X | ||
| ClearConnection | X | ||
| ConferenceCall | X | ||
| ConsultationCall | X | ||
| DeflectCall | X | ||
| DialDigits | X | ||
| DirectedPickupCall | X | ||
| HoldCall | X | ||
| MakeCall | X | ||
| ReconnectCall | X | ||
| RetrieveCall | X | ||
| SingleStepConferenceCall | X | ||
| SingleStepTransferCall | X | ||
| TransferCall | X | ||
| CallCleared | X | ||
| Conferenced | X | ||
| ConnectionCleared | X | ||
| Delivered | X | ||
| DigitsDialed | X | ||
| Diverted | X | ||
| Established | X | ||
| Failed | X | ||
| Held | X | ||
| NetworkCapabilitiesChanged | X | ||
| NetworkReached | X | ||
| Offered | X | ||
| Originated | X | ||
| Queued | X | ||
| Retrieved | X | ||
| ServiceInitiated | X | ||
| Transferred | X | ||
| X | |||
| Call Associated Features Services: | |||
| GenerateDigits | X | ||
| DigitsGenerated | X | ||
| Physical Device Feature Services: | |||
| GetMessageWaitingIndicator | X | ||
| SetMessageWaitingIndicator | X | ||
| MessageWaiting | X | ||
| Logical Device Features Services / Events: | |||
| GetDoNotDisturb | X | ||
| GetForwarding | X | ||
| SetDoNotDisturb | X | ||
| SetForwarding | X | ||
| DoNotDisturb | X | ||
| Forwarding | X | 
Version 6.0