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title Troubleshooting call end response codes for Calling SDK, Call Automation SDK, PSTN, Chat SDK, and SMS SDK - Azure Communication Services
description Use call end response codes to diagnose why a call ended for Calling SDK, Call Automation SDK, PSTN, Chat SDK, and SMS SDK.
services azure-communication-services
ms.date 07/14/2025
author slpavkov
ms.service azure-communication-services
ms.author slpavkov
manager aakanmu
audience ITPro
ms.topic troubleshooting
zone_pivot_groups acs-calling-automation-pstn

Troubleshooting call end response codes for Calling SDK, Call Automation SDK, PSTN, Chat SDK, and SMS SDK

This article describes troubleshooting call end response codes for Calling SDK, Call Automation, and PSTN calling.

::: zone pivot="calling,callend,automation,pstn,chat"

Troubleshooting tips

Consider the following tips when troubleshooting:

  • Your application isn't receiving an IncomingCall Event Grid event: Make sure the application endpoint is validated with Event Grid when creating an event subscription. The provisioning status for your event subscription is marked as succeeded if the validation was successful.
  • For error The field CallbackUri is invalid: Call Automation doesn't support HTTP endpoints. Make sure the callback URL you provide supports HTTPS.
  • The PlayAudio action doesn't play anything: Currently only Wave file (.wav) format is supported for audio files. The audio content in the wave file must be mono (single-channel), 16-bit samples with a 16,000 (16 KHz) sampling rate.
  • Actions on PSTN endpoints aren't working: For CreateCall, Transfer, AddParticipant, and Redirect to phone numbers, you need to set the SourceCallerId in the action request. Unless you're using direct routing, the source caller ID must be a phone number owned by your Communication Services resource for the action to succeed.

For more information about issues tracked by the product team, see Known issues.

::: zone-end

Note

Message and Result Categories listed in the following tables are in public preview. For more information, see Supplemental Terms of Use for Microsoft Azure Previews.

::: zone pivot="calling" [!INCLUDE Calling SDK] ::: zone-end

::: zone pivot="callend" [!INCLUDE Call end] ::: zone-end

::: zone pivot="automation" [!INCLUDE Call Automation] ::: zone-end

::: zone pivot="pstn" [!INCLUDE PSTN] ::: zone-end

::: zone pivot="chat" [!INCLUDE Chat SDK] ::: zone-end

::: zone pivot="sms" [!INCLUDE SMS SDK] ::: zone-end

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