# Telephony Usages for telephony devices, including telephone keypads and answering machines. ## Topics ### Getting the Usages [`kHIDUsage_TFon_Reserved`](/documentation/HIDDriverKit/kHIDUsage_TFon_Reserved) [`kHIDUsage_Tfon_AlternateFunction`](/documentation/HIDDriverKit/kHIDUsage_Tfon_AlternateFunction) [`kHIDUsage_Tfon_AnswerOnOrOff`](/documentation/HIDDriverKit/kHIDUsage_Tfon_AnswerOnOrOff) [`kHIDUsage_Tfon_AnsweringMachine`](/documentation/HIDDriverKit/kHIDUsage_Tfon_AnsweringMachine) [`kHIDUsage_Tfon_CallWaitingTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_CallWaitingTone) [`kHIDUsage_Tfon_CallerID`](/documentation/HIDDriverKit/kHIDUsage_Tfon_CallerID) [`kHIDUsage_Tfon_Conference`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Conference) [`kHIDUsage_Tfon_ConfirmationTone1`](/documentation/HIDDriverKit/kHIDUsage_Tfon_ConfirmationTone1) [`kHIDUsage_Tfon_ConfirmationTone2`](/documentation/HIDDriverKit/kHIDUsage_Tfon_ConfirmationTone2) [`kHIDUsage_Tfon_DoNotDisturb`](/documentation/HIDDriverKit/kHIDUsage_Tfon_DoNotDisturb) [`kHIDUsage_Tfon_Drop`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Drop) [`kHIDUsage_Tfon_Feature`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Feature) [`kHIDUsage_Tfon_Flash`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Flash) [`kHIDUsage_Tfon_ForwardCalls`](/documentation/HIDDriverKit/kHIDUsage_Tfon_ForwardCalls) [`kHIDUsage_Tfon_Handset`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Handset) [`kHIDUsage_Tfon_Headset`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Headset) [`kHIDUsage_Tfon_Hold`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Hold) [`kHIDUsage_Tfon_HookSwitch`](/documentation/HIDDriverKit/kHIDUsage_Tfon_HookSwitch) [`kHIDUsage_Tfon_InsideDialTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_InsideDialTone) [`kHIDUsage_Tfon_InsideRingTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_InsideRingTone) [`kHIDUsage_Tfon_InsideRingback`](/documentation/HIDDriverKit/kHIDUsage_Tfon_InsideRingback) [`kHIDUsage_Tfon_Line`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Line) [`kHIDUsage_Tfon_LineBusyTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_LineBusyTone) [`kHIDUsage_Tfon_Message`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Message) [`kHIDUsage_Tfon_MessageControls`](/documentation/HIDDriverKit/kHIDUsage_Tfon_MessageControls) [`kHIDUsage_Tfon_OutsideDialTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_OutsideDialTone) [`kHIDUsage_Tfon_OutsideRingTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_OutsideRingTone) [`kHIDUsage_Tfon_OutsideRingback`](/documentation/HIDDriverKit/kHIDUsage_Tfon_OutsideRingback) [`kHIDUsage_Tfon_Park`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Park) [`kHIDUsage_Tfon_Phone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Phone) [`kHIDUsage_Tfon_PhoneDirectory`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneDirectory) [`kHIDUsage_Tfon_PhoneKey0`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey0) [`kHIDUsage_Tfon_PhoneKey1`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey1) [`kHIDUsage_Tfon_PhoneKey2`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey2) [`kHIDUsage_Tfon_PhoneKey3`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey3) [`kHIDUsage_Tfon_PhoneKey4`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey4) [`kHIDUsage_Tfon_PhoneKey5`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey5) [`kHIDUsage_Tfon_PhoneKey6`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey6) [`kHIDUsage_Tfon_PhoneKey7`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey7) [`kHIDUsage_Tfon_PhoneKey8`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey8) [`kHIDUsage_Tfon_PhoneKey9`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKey9) [`kHIDUsage_Tfon_PhoneKeyA`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKeyA) [`kHIDUsage_Tfon_PhoneKeyB`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKeyB) [`kHIDUsage_Tfon_PhoneKeyC`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKeyC) [`kHIDUsage_Tfon_PhoneKeyD`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKeyD) [`kHIDUsage_Tfon_PhoneKeyPound`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKeyPound) [`kHIDUsage_Tfon_PhoneKeyStar`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneKeyStar) [`kHIDUsage_Tfon_PhoneMute`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PhoneMute) [`kHIDUsage_Tfon_PriorityRingTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PriorityRingTone) [`kHIDUsage_Tfon_PriorityRingback`](/documentation/HIDDriverKit/kHIDUsage_Tfon_PriorityRingback) [`kHIDUsage_Tfon_ProgrammableButton`](/documentation/HIDDriverKit/kHIDUsage_Tfon_ProgrammableButton) [`kHIDUsage_Tfon_RecallNumber`](/documentation/HIDDriverKit/kHIDUsage_Tfon_RecallNumber) [`kHIDUsage_Tfon_Redial`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Redial) [`kHIDUsage_Tfon_ReorderTone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_ReorderTone) [`kHIDUsage_Tfon_Ring`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Ring) [`kHIDUsage_Tfon_RingEnable`](/documentation/HIDDriverKit/kHIDUsage_Tfon_RingEnable) [`kHIDUsage_Tfon_ScreenCalls`](/documentation/HIDDriverKit/kHIDUsage_Tfon_ScreenCalls) [`kHIDUsage_Tfon_SpeakerPhone`](/documentation/HIDDriverKit/kHIDUsage_Tfon_SpeakerPhone) [`kHIDUsage_Tfon_SpeedDial`](/documentation/HIDDriverKit/kHIDUsage_Tfon_SpeedDial) [`kHIDUsage_Tfon_StoreNumber`](/documentation/HIDDriverKit/kHIDUsage_Tfon_StoreNumber) [`kHIDUsage_Tfon_TelephonyKeyPad`](/documentation/HIDDriverKit/kHIDUsage_Tfon_TelephonyKeyPad) [`kHIDUsage_Tfon_TonesOff`](/documentation/HIDDriverKit/kHIDUsage_Tfon_TonesOff) [`kHIDUsage_Tfon_Transfer`](/documentation/HIDDriverKit/kHIDUsage_Tfon_Transfer) [`kHIDUsage_Tfon_VoiceMail`](/documentation/HIDDriverKit/kHIDUsage_Tfon_VoiceMail) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)