Query Regarding audio url playback and Concurrency in ACS

[smriti_ms]

I am looking for answer of 2 questions.

1. If ACS can support audio url to return response to user over call. My team is working on bot service for PSTN where we take user input and bot returns response as audio url. How can I play this back to user.

2. We want to build this at scale for inbound calls. So what happens if thousands of people are calling the same number at the same time. Basically we want to understand concurrency capability around ACS. 

[#2]

Hi there,

1. Through ACS you can play prompts to callers using the play action provided through Call Automation SDK and APIs. This allows you to play prompts by either Audio File, Text-to-Speech or SSML. Here are a couple links that might be useful https://learn.microsoft.com/en-us/azure/communication-services/concepts/call-automation/play-action and the Text-to-Speech and SSML require you connecting your ACS resource to your Azure AI resource, https://learn.microsoft.com/en-us/azure/communication-services/concepts/call-automation/azure-commun....

2. For scale, please refer to our documentation on service limits - https://learn.microsoft.com/en-us/azure/communication-services/concepts/service-limits