Hello everyone, I’m developing a VoIP-based application that supports both standard VoIP calls and Push-To-Talk (PTT) calls. The app does not use the unrestricted-voip entitlement since it’s not publicly documented or communicated as a standard by Apple. Previously, I handled PTT calls using CallKit after receiving PushKit notifications, but I’m now migrating PTT functionality to the PushToTalk Framework while keeping CallKit for standard VoIP calls. I’m facing a few challenges that I’d like help with: Handling Incoming Push-To-Talk Calls When the App Is Closed and the Device Is Locked I considered continuing to use PushKit notifications to alert users via CallKit and using CallKit until the user brings the app into the foreground, at which point I’d switch to the PushToTalk Framework. While this could technically work, the user experience is not ideal. Are there any recommended approaches for handling PTT calls in this state? Handling Incoming PTT Calls When the App Is in the Background According to Apple documentation, I cannot join a PTT session unless my app is in the foreground. However, in practical scenarios, we often receive incoming PTT calls while the app is in the background. What’s the best solution for this situation? It feels odd to show notifications or use CallKit until the app is foregrounded. Conflict Between Ongoing PushToTalk Call and Incoming Cellular Call Currently, if there’s an ongoing PushToTalk call using the PTT framework and a cellular call comes in, if I receive a PTT transmission and call requestBeginTransmission, the cellular call is ended. I can handle this within my app, but is this expected behavior? Is this the intended conflict management for concurrent PTT and cellular calls? Lastly, a broader question: when will the unrestricted-voip entitlement stop working? I’m contemplating using this entitlement to handle incoming PTT calls without CallKit, but I’m concerned about its longevity. Some apps have been using it for messaging and other features for over four years, and it’s still functional for them. Any guidance or insights on these points would be greatly appreciated! Thanks in advance!

We have been successfully using the PTT (Push-to-Talk) framework in our application since the release of iOS 17. Audio is recorded by pressing a PTT button and speaking after the PTT framework initiates an AVAudioSession. While the PTT framework has generally worked well since the iOS 17 release, we have received reports that, on occasion, after the app has been idle for a while ( when I have seen it my phone has been in flightmode over night), it suddenly records only silent audio. This issue does not occur every time but sporadically. For users experiencing this problem, pressing the PTT button results in no “PTT framework start sound,” and only “empty sound” is recorded. The only solution to restore audio is restarting the device. Restarting the app alone is insufficient, though leaving the PTT channel and rejoining it also resolves the issue. I have reproduced the problem several times and observed that everything appears normal within the app. We receive an active AVAudioSession from the PTT framework, and it seems like the app is recording, but all recorded sound packets are silent. Upon reviewing logs from the phone (via the Console app), I noticed that the app is muted when starting the recording and unmuted after stopping the recording. For example: • Start recording ≈ 15:01:30 • Stop recording ≈ 15:01:44 • 15:01:30.124144+0100 audiomxd -CMSessionMgr- MXCoreSessionSetProperty: Session ‘sid:0xa80037, AppName(2717), ‘prim’’ isRecordingMuted updated to ‘1’ • 15:01:44.384208+0100 audiomxd -CMSessionMgr- MXCoreSessionSetProperty: Session ‘sid:0xa80037, AppName(2717), ‘prim’’ isRecordingMuted updated to ‘0’ When the system functions normally, the isRecordingMuted flag toggles between 0 and 1, but remains at 0 (non-muted) during recording. After stopping the recording, this state does not change anymore, unlike in the error state. There is no difference in behavior whether the app is in the foreground or background when starting the transmission, or whether the PTT framework’s “Talk” button is used once the device enters the “error state.” I have filed a bug report with logs provided on 28 November 2023 that is still open but no feedback. We now have customers that are reporting this issue again on 17.5.1 and its starting to be a big issue. Anyone else that have similar problems ?

I am using PushToTalk in my project for using only listing audio. steps :- App Launch :- Create PTT Channel PTT Token :- Send Token in Server App Kill :- It's Automatically restored channel using :- channelDescriptor(restoredChannelUUID channelUUID: UUID) -> PTChannelDescriptor Play audio given by incomingPushResult method issue :- I am receiving an audio link through incomingPushResult. When incomingPushResult is called, it automatically restores the channel. However, the channel has already been created, resulting in two channels being created. When I send the link from the server, the audio plays properly. However, if I resend the same link after 5-6 seconds, the audio does not play. After I leave the first channel, the same audio starts playing in the second channel. When I send the link again, the audio does not play because I left the first (main) channel. func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { UNUserNotificationCenter.current().delegate = self UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { granted, error in if granted { DispatchQueue.main.async { application.registerForRemoteNotifications() } } } Task { await self.createChannel() } return true } func createChannel() async { do { channelManager = try await PTChannelManager.channelManager(delegate: self, restorationDelegate: self) let channelImage = UIImage(named: "ic_p") channelDescriptor = PTChannelDescriptor(name: "Pikachu", image: channelImage) let channelUUID = UUID() self.currentChannelUUID = channelUUID channelManager?.requestJoinChannel(channelUUID: channelUUID, descriptor: channelDescriptor!) print("PTT creating channel") } catch { print("Error creating channel: \(error)") } } func incomingPushResult(channelManager: PTChannelManager, channelUUID: UUID, pushPayload: [String : Any]) -> PTPushResult { guard let data = pushPayload["data"] as? [String: Any], let mediaLink = data["media_link"] as? String else { return .leaveChannel } print("incomingPTT") // URL to fetch the audio data from self.audioURL = mediaLink // Play the audio from the URL DispatchQueue.main.async { self.playSound(url: self.audioURL) } let participant = PTParticipant(name: mediaLink, image: .checkmark) return .activeRemoteParticipant(participant) } func channelDescriptor(restoredChannelUUID channelUUID: UUID) -> PTChannelDescriptor { let channelImage = UIImage(named: "ic_r") return PTChannelDescriptor(name: "Restored Channel", image: channelImage) } func channelManager(_ channelManager: PTChannelManager, didActivate audioSession: AVAudioSession) { print("Activated audio session") self.playSound(url: self.audioURL) } Output: - App Launch After App Kill Play audio :- Audio Play Success and leave the channel (Before Leave Channel View) After Leave Channel View

Hello All, I am getting following popup for our application, I have implemented PTT Push To Talk framework by following https://developer.apple.com/documentation/pushtotalk/creating-a-push-to-talk-app We are using following VoIP entitlements, Our app support from iOS 12 i) com.apple.developer.pushkit.unrestricted-voip ii) com.apple.developer.pushkit.unrestricted-voip.ptt We have updated app with new Push To Talk framework and it's working fine. Our app's minimum deployment target is iOS-12.0 , So app will also work without using PTT framework for older iOS. Question, Why popup display even after new Push To Talk framework implementation? what should I do to remove this popup from showing? Should I do any other setting to complete this framework? Thanks.

App getting terminated as the app enters background state. No crash logs are generated. I have collected this log from Console(Mac app)by connecting iPhone and sending my app to background. There is no meaningful reason or code I can get from the logs. Can you please help me with what does 'explanation:BG Kill Demo ' means ? My app is a VoIP app. App depends on voip apns notifications to receive information about new Voip calls from server. I am posting the logs collected from console app here. default 14:29:55.265590-0400 audiomxd -CMSessionMgr- CMSessionMgrHandleApplicationStateChange: Sending stop command to com.myapp.bundleid with pid '2933' because client is background suspended and there is no AirPlay video session for it default 14:29:55.265753-0400 dasd Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.265908-0400 locationd Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.265994-0400 locationd {"msg":"invoking applicationStateChange handler", "StateChangeData":"{\n BKSApplicationStateAppIsFrontmost = 0;\n BKSApplicationStateExtensionKey = 0;\n SBApplicationStateDisplayIDKey = "com.myapp.bundleid";\n SBApplicationStateKey = 2;\n SBApplicationStateProcessIDKey = 2933;\n SBMostElevatedStateForProcessID = 2;\n}"} default 14:29:55.266083-0400 locationd {"msg":"Post Application State Change Notification", "notification":"BackgroundTaskSuspended", "pid":2933, "bundleId":"com.myapp.bundleid"} default 14:29:55.267019-0400 locationd {"msg":"#CLIUA AppMonitor notification", "notification":"BackgroundTaskSuspended", "pid":2933, "bundleId":"com.myapp.bundleid", "ClientKey":"icom.myapp.bundleid:"} default 14:29:55.267061-0400 locationd {"msg":"skip erasing #CLIUA for RunningBoard Process State. Does not exists", "bundleId":"com.myapp.bundleid"} default 14:29:55.267678-0400 watchdogd Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.267765-0400 useractivityd Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.267934-0400 symptomsd Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.267982-0400 wifid Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.268228-0400 UserEventAgent Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.268275-0400 callservicesd Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.268338-0400 WirelessRadioManagerd Received state update for 2933 (app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>, running-suspended-NotVisible default 14:29:55.269217-0400 runningboardd Acquiring assertion targeting [app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933] from originator [osservice<com.apple.dasd>:76] with description <RBSAssertionDescriptor| "DAS: Application is docked." ID:33-76-44901 target:2933 attributes:[ <RBSDomainAttribute| domain:"com.apple.dasd" name:"DockApp" sourceEnvironment:"(null)"> ]> default 14:29:55.269572-0400 runningboardd Assertion 33-76-44901 (target:[app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933]) will be created as active default 14:29:55.270431-0400 runningboardd [app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933] Set jetsam priority to 30 [0] flag[1] default 14:29:55.270658-0400 runningboardd Calculated state for app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>: running-suspended (role: None) (endowments: (null)) default 14:29:55.273005-0400 runningboardd Received termination request from [osservice<com.apple.dasd>:76] on <RBSProcessPredicate <RBSProcessHandlePredicateImpl| app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933>> with context <RBSTerminateContext| explanation:BG Kill Demo reportType:None maxTerminationResistance:Interactive> default 14:29:55.274715-0400 runningboardd Executing termination request for: <RBSProcessPredicate <RBSProcessHandlePredicateImpl| app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933>> default 14:29:55.275034-0400 runningboardd [app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933] Terminating with context: <RBSTerminateContext| explanation:BG Kill Demo reportType:None maxTerminationResistance:Interactive> default 14:29:55.275122-0400 runningboardd [app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933] terminate_with_reason() success default 14:29:55.275768-0400 SpringBoard [app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933] Workspace connection invalidated. default 14:29:55.275790-0400 SpringBoard [app<com.myapp.bundleid(AD9F24FF-321B-48U6-895F-723CDA943372)>:2933] Now flagged as pending exit for reason: workspace client connection invalidated default 14:29:55.275815-0400 backboardd Connection removed: IOHIDEventSystemConnection uuid:C2525EA6-A052-480B-B83D-4BD62C29C6EC pid:2933 process:MyApp type:Passive entitlements:0x0 caller:BackBoardServices: + 280 attributes:{ HighFrequency = 1; bundleID = "com.myapp.bundleid"; pid = 2933; } state:0x1 events:9 mask:0x800 dropped:0 dropStatus:0 droppedMask:0x0 lastDroppedTime:NONE default 14:29:55.275988-0400 backboardd Removing client connection <BKHIDClientConnection: 0xd43cd1f40; IOHIDEventSystemConnectionRef: 0xd415d5800; vpid: 2933(v1C3E); taskPort: 0x84D8B; bundleID: com.myapp.bundleid> for client: IOHIDEventSystemConnection uuid:C2525EA6-A052-480B-B83D-4BD62C29C6EC pid:2933 process:MyApp type:Passive entitlements:0x0 caller:BackBoardServices: + 280 attributes:{ HighFrequency = 1; bundleID = "com.myapp.bundleid"; pid = 2933; } state:0x1 events:9 mask:0x800 dropped:0 dropStatus:0 droppedMask:0x0 lastDroppedTime:NONE source:HID default 14:29:55.288098-0400 runningboardd [app<com.myapp.bundleid(AD9F24F321B-48U6C7-895F-723CDA943372)>:2933] termination reported by launchd (15, 0, 9) default 14:29:55.289192-0400 runningboardd Removing process: [app<com.myapp.bundleid(AD9F24F321B-48U6C7-895F-723CDA943372)>:2933] default 14:29:55.289331-0400 runningboardd Removing launch job for: [app<com.myapp.bundleid(AD9F24F321B-48U6C7-895F-723CDA943372)>:2933] default 14:29:55.289582-0400 runningboardd Removed job for [app<com.myapp.bundleid(AD9F24F321B-48U6C7-895F-723CDA943372)>:2933] default 14:29:55.289706-0400 runningboardd Removing assertions for terminated process: [app<com.myapp.bundleid(AD9F24F321B-48U6C7-895F-723CDA943372)>:2933]

I would like to know more about how I can use a bluetooth PTT device with the "Push to Talk" framework on iOS. I've enabled the setAccessoryButtonEventsEnabled on the PTChannelManager, but I am unable to get it to transmit when I press the PTT button on the device. Is there documentation that explains any additional steps I need to do in order to use a bluetooth PTT device with an iPhone using the Push to Talk framework? Our application works fine when interacting through the software UI. I'm testing with a PrymeMax PTT device. This is the user guide: https://www.pryme.com/files/manuals/MANUAL-BTH-550-MAX.pdf There are a lot of generic devices like this one that I would like to support. Can somebody provide more information on how this is accomplished? I would also like to support it with iOS versions older than iOS 17 if possible.

I am working on a VoIP based PTT app. Uses 'voip' apns notification type to get to know about new incoming PTT call.  When the app is in foreground, the app gets to know about incoming VoIP PTT call through incoming push notification. After receiving notification, the app receives audio from the server. This works properly, as expected. The app faces issues in receiving apns notifications only when the app is in background. Issue: My app is in background and iPhone locked, the server sends apns notification to the target iPhone about a new incoming VoIP call. Server received 200 success response code from APNS. But the app in background did not receive the notification. Second time, the server sends notification about second VoIP call. App did not receive notification. Third time, server sends notification about 3rd incoming call. This list goes on. Everytime server sends a notification to the target phone, success response is received from APNS. 
 Now, bring the app to foreground, the app receives all the pending notifications at once. This scenario happens only in a few phones. Those customers are missing PTT calls.
Can you please provide us suggestions to solve this issue ? My app uses unrestricted-voip entitlement

I am working on a VoIP based PTT app. Uses 'voip' apns notification type to get to know about new incoming PTT call. When my app receives a PTT call, the app plays audio. But the call audio is not heard. While checking the phone volume, the API [[AVAudioSession sharedInstance] outputVolume] returns 0. But clearly the phone volume is not zero. On checking the phone volume by pressing side volume button, the volume is above 50%. This behavior is observed in both app foreground and background scenario. Why does the API return zero volume level ? Is there any other reason why the app volume is not heard ?

I have developed an app using Flutter that utilizes the Push to Talk framework on iOS. The Push to Talk feature works perfectly in debug mode, but after archiving the build and installing it on an iOS 17 device, the Push to Talk functionality stops working. Here are the steps I have already taken: Enabled background modes. Enabled Push to Talk capabilities. Despite these settings, the issue persists in the archive build. Has anyone else encountered this issue? What additional steps or configurations are required to get Push to Talk working in the archive build on iOS 17? Any help or guidance would be greatly appreciated. Thank you!

With the integration of Apple's pushToTalk framework - we create the PTChannelManager using its async initializer from AppDidFinishLaunching - using an actor to ensure the PTChannelManager is only created once. With this we have been seeing a lot of crashes for users in our analytics dashboards happening about ~2 seconds after app launch around a task-dealloc. Here is a simplified version of our actor and Manager - where the manager just shows the init. The init of it is an async optional init because the creation of the PTChannelManager uses an async throws. actor PushToTalkDeviceContainer { private var internalPushToTalkManagerTask: Task<PushToTalkManager?, Never>? func pushToTalkManager() async -> PushToTalkManager? { #if !os(visionOS) if let internalPushToTalkManagerTask { return await internalPushToTalkManagerTask.value } let internalPushToTalkManagerTask = Task<PushToTalkManager?, Never> { return await PushToTalkManagerImp() } self.internalPushToTalkManagerTask = internalPushToTalkManagerTask return await internalPushToTalkManagerTask.value #else return nil #endif } } public class PushToTalkManagerImp: PushToTalkManager { public let onPushToTalkDelegationEvent: AnyPublisher<PushToTalkDelegationEvent, Never> public let onPushToTalkAudioSessionChange: AnyPublisher<PushToTalkManagerAudioSessionChange, Never> public let onChannelRestoration: AnyPublisher<UUID, Never> private let ptChannelManager: PTChannelManager private let restorationDelegate: PushToTalkRestorationDelegate private let delegate: PushToTalkDelegate init?() async { self.delegate = PushToTalkDelegate() self.restorationDelegate = PushToTalkRestorationDelegate() self.onPushToTalkDelegationEvent = delegate.pushToTalkDelegationSubject.eraseToAnyPublisher() self.onPushToTalkAudioSessionChange = delegate.audioSessionSubject.eraseToAnyPublisher() self.onChannelRestoration = restorationDelegate.restorationDelegateSubject.eraseToAnyPublisher() do { ptChannelManager = try await PTChannelManager.channelManager(delegate: delegate, restorationDelegate: restorationDelegate) } catch { return nil } } } The crash stack trace is as follows: 0 libsystem_kernel.dylib 0x00000001e903342c __pthread_kill + 8 (:-1) 1 libsystem_pthread.dylib 0x00000001fcdd2c0c pthread_kill + 268 (pthread.c:1721) 2 libsystem_c.dylib 0x00000001a7ed6c34 __abort + 136 (abort.c:159) 3 libsystem_c.dylib 0x00000001a7ed6bac abort + 192 (abort.c:126) 4 libswift_Concurrency.dylib 0x00000001ab2bf7c8 swift::swift_Concurrency_fatalErrorv(unsigned int, char const*, char*) + 32 (Error.cpp:25) 5 libswift_Concurrency.dylib 0x00000001ab2bf7e8 swift::swift_Concurrency_fatalError(unsigned int, char const*, ...) + 32 (Error.cpp:35) 6 libswift_Concurrency.dylib 0x00000001ab2c39a8 swift_task_dealloc + 128 (TaskAlloc.cpp:59) 7 MyApp 0x0000000104908e04 PushToTalkManagerImp.__allocating_init() + 40 (PushToTalkManager.swift:0) 8 MyApp 0x0000000104908e04 closure #1 in PushToTalkDeviceContainer.pushToTalkManager() + 60 9 MyApp 0x00000001041882e9 specialized thunk for @escaping @callee_guaranteed @Sendable @async () -> (@out A) + 1 (<compiler-generated>:0) 10 MyApp 0x0000000103a652bd partial apply for specialized thunk for @escaping @callee_guaranteed @Sendable @async () -> (@out A) + 1 (<compiler-generated>:0) 11 libswift_Concurrency.dylib 0x00000001ab2c2775 completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*) + 1 (Task.cpp:463)

I'm facing an issue where I can't play an audio file stored in my project after receiving a push-to-talk notification. Strangely, I'm able to play the audio file by tapping on a button before receiving the push notification, but it doesn't work afterward without any error messages. I've ensured that I've set up everything correctly in my project's capabilities. Any insights on what might be causing this issue would be greatly appreciated. I set everything in capabilities Set permission in .plist Request permission in app delegate I make connection to the room when app becomes active and received succes Then I setup .halfDuplex for this channel In restoredChannelUUID I activate AVAudioSession After sending the ppt push, I parse speaker and make it activeRemoteParticipant. I see than delegate function channelManager didActivate works good Where I tried to play audio from my player I see this prints in console, but no sound play

Hi. I'm fixing issue of my push to talk app behavior. While I'm joining Push To Talk channel, then I uninstall application, application does not exist but system shows PushToTalk status in status bar with blue button. I want to automatically leave channel after uninstall app, but now I cannot handle this behavior. If there is some expected behavior of apple, I want to know it but I cannot find their expectation in any document. Does anyone know it? best regards.

Hello, We're interested in using the PTT Framework with our PTT capable hardware, as the framework has intended. The problem is activating Siri with any of our specified Intent's doesn't work when the phone is locked. The iPhone always says "You'll have to unlock your iPhone first". Reading up on the problem, it seems pretty common in the fact that Apple doesn't allow Siri Intents to be executed while the phone is locked. It's a sensible precaution by default, but there are countless threads of real use cases that users want to use Siri without unlocking (with PTT, or well, without). There appears to be no options for PTT to enable this, any flags on the Siri Intent to allow benign App actions or queries, user UI configuration through Settings -> Siri & Search to manually allow it even when the phone is locked. Neither are there any entitlements (that I'm aware of) that would allow trivial and non-secure Siri App Intents. The only advice we have for our users (and albeit against the intention of the limitation in the first place) is to: Disable Auto Lock, Disable Face ID and to Disable Passcode. It is in fact 2024, and users do expect a better experience than this with Siri, or am I missing something?

Hello, I am approaching the recent PTT Framework as my desire is to create a Walkie Talkie app. I watched the video and followed the documentation. I haven't managed to get it working yet, as there are some steps that aren't 100% clear to me. But the biggest doubt right now is: if I manage to create a walkie talkie App that works with PTT Framework on SwiftUI, will I be able to integrate this functionality in some way with the Android version of the same App? I don't know if it's worth mentioning but my backend right now is Firebase.

Our PTT framework app works great but we have now found an interesting scenario where you can get the PTT Framework in a state that is non functional. Here's how it can be reproduced: Start your PTT app ( With PTT framework ) Successfully joined channel and we can transmit and receive incoming transmits. Put app in background. ( PTT framework/GUI symbol present in top) Wait 1 min Restart phone by pressing volume up + right side button Wait 1 min Start phone We can now get two scenarios: "Sceanario *1": In 4 of 5 cases the PTT framework symbol will be present directly when phone is started. If we here start running our app we can see that the channel is restored and everyting works perfectly. "Sceanario *2": In 1 of 5 cases the PTT framework symbol is not present after phone is started, and will not be even if waiting. If we here start running our app we can see that the channel is also here restored (channelDescriptor(restoredChannelUUID channelUUID: UUID) -> PTChannelDescriptor) and we can successfully call "mgr.setTransmissionMode(newTransmissionMode, channelUUID: self.channelUUID)" on our channel ( PTT framework symbol still not present !!!!) If we now try to call "requestBeginTransmitting(channelUUID: UUID)" we will get the PTChannelError error channelNotFound !!!! We are then reacting to this and trying to do leave the channel "leaveChannel(channelUUID: UUID)" but also this is returning PTChannelError error channelNotFound in "channelManager(_ channelManager: PTChannelManager, failedToLeaveChannel channelUUID: UUID, error: Error))" !!!! The interesting thing here is that my log is saying the following: PTTFrameworkImpl: failedToLeaveChannel 6D5AFE96-9389-4CFB-893A-64D51D4542XX error=The operation couldn’t be completed. (com.apple.pushtotalk.channel error 1.), joined=true, activeChannelUUID is=6D5AFE96-9389-4CFB-893A-64D51D4542XX. So we are getting channelNotFound for 6D5AFE96-9389-4CFB-893A-64D51D4542XX but when at the same type checking active channel with channelManager.activeChannelUUID we are getting 6D5AFE96-9389-4CFB-893A-64D51D4542XX. After this we logout our user in our app. If we now try to login again we will get a scenario where "requestJoinChannel(channelUUID: UUID, descriptor: PTChannelDescriptor)" will result in just NO RESPONS in means of "channelManager(_ channelManager: PTChannelManager, didJoinChannel channelUUID: UUID, reason: PTChannelJoinReason)" or "channelManager(_ channelManager: PTChannelManager, failedToJoinChannel channelUUID: UUID, error: Error)" FYI: The fault are occuring on 17.3 also and the syslog I provided here is on 17.3 developer beta One interesting observation we have seen is that we only see this problem when "allow location access" is set to never for our app.

Hello, I am reading up on the documentation and seems to have some discrepancies but wanted to double check. In Overview for PTChannelManager, it states "Multiple calls to channelManager(delegate:restorationDelegate:completionHandler:) result in the system returning the same shared instance, so store the channel manager in an instance variable." https://developer.apple.com/documentation/pushtotalk/ptchannelmanager However if we look at the documentation for creation of a channel manager, in the completionHandler, it states that it will return "A new channel manager instance." https://developer.apple.com/documentation/pushtotalk/ptchannelmanager/4031737-channelmanager So is it a shared instance that gets returned or will a new instance be created? Need to know if we will need to implement a multiDelegate Pattern or not for this scenario for example if someone else called this function, would they take over the callbacks or would they get their own instance? Thank you.

1- Did activate audio session get called in both receiveing and transmiting what the best practice to handle Playback & Recording. 2- how to playback audio after that cuse in background websocket get killed "Software caused connection abort". Thanks in advance.🙏🏻

How to programmatically leave a channel when an app is forced closed? Currently when a user closes the app, the channel remains active and can still talk via the status bar. However i imagine if a user force closes the app, they no longer want to talk. I tried implementing this via  func applicationWillTerminate(_ application: UIApplication) { // leave channel code } but it doesn't seem to work

I am receiving a push through "incomingPushResultForChannelManager" of Push to talk Framework and setting a remote participant through "pushResultForActiveRemoteParticipant" or setting a remote participant using "setActiveRemoteParticipant" directly in the PTT App without receiving a push. When the app establishes a remote participant on a channel, an Audio Session is started anew and will receive an active Audio Session. The problem is that the time to activate this Audio Session is not short. For this reason, there are many cases where the first part of the other party's voice passes without being played. Also, if the app is running in the foreground, even if it doesn't acquire a new audio session, it can play the voice through the app's own audio session. However, by restarting the Audio Session, the Audio Session is changed unnecessarily and the voice playback is delayed. Question. Can I set the Audio Session to not change when setting the remote participant's information? If this is not possible, please advise on a solution for the case where the audio session is activated after the voice starts to be received.

Hello, Do you recommend to use Push to Talk for Voip apps ?