WaitForNoise()

Since 1.6.1.0 Applications Found this useful? Upvote it. ×

Waits for a specified amount of noise.

Last reviewed 2026-04-14

WaitForNoise([noiserequired,iterations,timeout])
Dialplan Builder -- build your WaitForNoise() command
If not specified, defaults to `1000` milliseconds.
If not specified, defaults to `1`.
Is specified only to avoid an infinite loop in cases where silence is never achieved.
Full arguments reference
  • noiserequired - If not specified, defaults to 1000 milliseconds.
  • iterations - If not specified, defaults to 1.
  • timeout - Is specified only to avoid an infinite loop in cases where silence is never achieved.
Description

Waits for up to noiserequired milliseconds of noise, iterations times. An optional timeout specified the number of seconds to return after, even if we do not receive the specified amount of noise. Use timeout with caution, as it may defeat the purpose of this application, which is to wait indefinitely until noise is detected on the line.

Arguments
  • noiserequired - If not specified, defaults to 1000 milliseconds.
  • iterations - If not specified, defaults to 1.
  • timeout - Is specified only to avoid an infinite loop in cases where silence is never achieved.
User Notes

Know a tip or gotcha for this topic? Share it below and help others.

Contribute a note

Share a tip, gotcha, or practical example. Keep it under 2000 characters. No questions (use the Asterisk community forums for support). Wrap code in backticks.

Moderated before publishing. Email never shown.

Related

If()

Start an if branch.

Applications application dialplan
Zapateller()

Generates special information tone to block telemarketers from calling you. This application will set the following chan...

Applications application dialplan
While()

Start a while loop.

Applications application dialplan
WaitUntil()

Wait (sleep) until the current time is the given epoch.

Applications application dialplan
WaitForTone()

Waits for a single-frequency tone to be detected before dialplan execution continues. WAITFORTONESTATUS - This indicates...

Applications application dialplan
Applications
ConfBridge() MusicOnHold() StartMusicOnHold() StopMixMonitor() ADSIProg() AELSub() AGI() AMD() AddQueueMember() AgentLogin() AgentRequest() AlarmReceiver() Answer() AttendedTransfer() AudioSocket() Authenticate() Background() BackgroundDetect() BlindTransfer() Bridge() BridgeAdd() BridgeWait() Broadcast() Busy() CELGenUserEvent() CallCompletionCancel() CallCompletionRequest() ChanIsAvail() ChanSpy() ChangeMonitor() ChannelRedirect() ClearHash() ConfKick() Congestion() ContinueWhile() ControlPlayback() DAHDIAcceptR2Call() DAHDIRAS() DAHDIScan() DAHDISendCallreroutingFacility() DAHDISendKeypadFacility() DBdeltree() DISA() DateTime() DeadAGI() Dial() Dictate() Directory() DumpChan() EAGI() Echo() Else() ElseIf() EndIf() EndWhile() Exec() ExecIf() ExecIfTime() ExitIf() ExitWhile() ExtenSpy() ExternalIVR() Festival() Flash() FollowMe() ForkCDR() GetCPEID() Gosub() GosubIf() Goto() GotoIf() GotoIfTime() Hangup() HangupCauseClear() IAX2Provision() ICES() IVRDemo() If() ImportVar() Incomplete() JACK() JabberJoin() JabberLeave() JabberSend() JabberSendGroup() JabberStatus() Log() MP3Player() MSet() Macro() MacroExclusive() MacroExit() MacroIf() MailboxExists() MeetMe() MeetMeAdmin() MeetMeChannelAdmin() MeetMeCount() MessageSend() Milliwatt() MinivmAccMess() MinivmDelete() MinivmGreet() MinivmMWI() MinivmNotify() MinivmRecord() MixMonitor() Monitor() Morsecode() NBScat() NoCDR() NoOp() ODBCFinish() ODBC_Commit() ODBC_Rollback() OSPAuth() OSPFinish() OSPLookup() OSPNext() Originate() PJSIPHangup() PJSIPNotify() Page() Park() ParkAndAnnounce() ParkedCall() PauseMonitor() PauseQueueMember() Pickup() PickupChan() PlayTones() Playback() PrivacyManager() Proceeding() Progress() Queue() QueueLog() QueueUpdate() RaiseException() Read() ReadExten() ReceiveFAX() ReceiveMF() ReceiveSF() ReceiveText() Record() Reload() RemoveQueueMember() ResetCDR() RetryDial() Return() Ringing() SIPAddHeader() SIPDtmfMode() SIPRemoveHeader() SIPSendCustomINFO() SLAStation() SLATrunk() SMS() SayAlpha() SayAlphaCase() SayCountedAdj() SayCountedNoun() SayDigits() SayMoney() SayNumber() SayOrdinal() SayPhonetic() SayUnixTime() SendDTMF() SendFAX() SendImage() SendMF() SendSF() SendText() SendURL() Set() SetAMAFlags() Signal() SkelGuessNumber() SoftHangup() SpeechActivateGrammar() SpeechBackground() SpeechCreate() SpeechDeactivateGrammar() SpeechDestroy() SpeechLoadGrammar() SpeechProcessingSound() SpeechStart() SpeechUnloadGrammar() StackPop() Stasis() StatsD() StopMonitor() StopMusicOnHold() StopPlayTones() StoreDTMF() StreamEcho() System() TestClient() TestServer() ToneScan() Transfer() TryExec() TrySystem() UnpauseMonitor() UnpauseQueueMember() UserEvent() VMAuthenticate() VMSayName() Verbose() VoiceMail() VoiceMailMain() VoiceMailPlayMsg() Wait() WaitDigit() WaitExten() WaitForCondition() WaitForNoise() WaitForRing() WaitForSignal() WaitForSilence() WaitForTone() WaitUntil() While() Zapateller()
Applications
ConfBridge() MusicOnHold() StartMusicOnHold() StopMixMonitor() ADSIProg() AELSub() AGI() AMD() AddQueueMember() AgentLogin() AgentRequest() AlarmReceiver() Answer() AttendedTransfer() AudioSocket() Authenticate() Background() BackgroundDetect() BlindTransfer() Bridge() BridgeAdd() BridgeWait() Broadcast() Busy() CELGenUserEvent() CallCompletionCancel() CallCompletionRequest() ChanIsAvail() ChanSpy() ChangeMonitor() ChannelRedirect() ClearHash() ConfKick() Congestion() ContinueWhile() ControlPlayback() DAHDIAcceptR2Call() DAHDIRAS() DAHDIScan() DAHDISendCallreroutingFacility() DAHDISendKeypadFacility() DBdeltree() DISA() DateTime() DeadAGI() Dial() Dictate() Directory() DumpChan() EAGI() Echo() Else() ElseIf() EndIf() EndWhile() Exec() ExecIf() ExecIfTime() ExitIf() ExitWhile() ExtenSpy() ExternalIVR() Festival() Flash() FollowMe() ForkCDR() GetCPEID() Gosub() GosubIf() Goto() GotoIf() GotoIfTime() Hangup() HangupCauseClear() IAX2Provision() ICES() IVRDemo() If() ImportVar() Incomplete() JACK() JabberJoin() JabberLeave() JabberSend() JabberSendGroup() JabberStatus() Log() MP3Player() MSet() Macro() MacroExclusive() MacroExit() MacroIf() MailboxExists() MeetMe() MeetMeAdmin() MeetMeChannelAdmin() MeetMeCount() MessageSend() Milliwatt() MinivmAccMess() MinivmDelete() MinivmGreet() MinivmMWI() MinivmNotify() MinivmRecord() MixMonitor() Monitor() Morsecode() NBScat() NoCDR() NoOp() ODBCFinish() ODBC_Commit() ODBC_Rollback() OSPAuth() OSPFinish() OSPLookup() OSPNext() Originate() PJSIPHangup() PJSIPNotify() Page() Park() ParkAndAnnounce() ParkedCall() PauseMonitor() PauseQueueMember() Pickup() PickupChan() PlayTones() Playback() PrivacyManager() Proceeding() Progress() Queue() QueueLog() QueueUpdate() RaiseException() Read() ReadExten() ReceiveFAX() ReceiveMF() ReceiveSF() ReceiveText() Record() Reload() RemoveQueueMember() ResetCDR() RetryDial() Return() Ringing() SIPAddHeader() SIPDtmfMode() SIPRemoveHeader() SIPSendCustomINFO() SLAStation() SLATrunk() SMS() SayAlpha() SayAlphaCase() SayCountedAdj() SayCountedNoun() SayDigits() SayMoney() SayNumber() SayOrdinal() SayPhonetic() SayUnixTime() SendDTMF() SendFAX() SendImage() SendMF() SendSF() SendText() SendURL() Set() SetAMAFlags() Signal() SkelGuessNumber() SoftHangup() SpeechActivateGrammar() SpeechBackground() SpeechCreate() SpeechDeactivateGrammar() SpeechDestroy() SpeechLoadGrammar() SpeechProcessingSound() SpeechStart() SpeechUnloadGrammar() StackPop() Stasis() StatsD() StopMonitor() StopMusicOnHold() StopPlayTones() StoreDTMF() StreamEcho() System() TestClient() TestServer() ToneScan() Transfer() TryExec() TrySystem() UnpauseMonitor() UnpauseQueueMember() UserEvent() VMAuthenticate() VMSayName() Verbose() VoiceMail() VoiceMailMain() VoiceMailPlayMsg() Wait() WaitDigit() WaitExten() WaitForCondition() WaitForNoise() WaitForRing() WaitForSignal() WaitForSilence() WaitForTone() WaitUntil() While() Zapateller()