Deepgram

Deepgram is a U.S.-based ASR/TTS provider. Its products are specifically optimized for phone call scenarios, offering more accurate speech recognition and extremely fast response times.

First, register an account at: www.deepgram.com. By default, the account includes $200 in free credits.credits.
After the account is created successfully, create an API key in Deepgram, copy it and save it to a text file.

In addition, Deepgram also provides service endpoints in Europe, making it a good choice for users serving the European market.
The European service endpoint is: 

wss://api.eu.deepgram.com/v1/listen

In the EasyCallCenter365 admin portal, go to menu: 
Basic Configuration -> Speech To Text-> Amazon Aws.

Here, you need to modify two parameters: API Key and Server URL.
For users in the United States, you only need to modify the API Key.