Hello,
Apologies for the delay in response here.
The timeout to retrieve media from the specified URL is 10 seconds. Naturally, the path that Sinch takes to retrieve the media from your URL may have higher latency than you experience locally, dependent on where the URL is hosted.
If you continue to experience the error, please do raise a support ticket via support@sinch.com and we will then be able to investigate further to see the Roundtrip time from the perspective of the media injection.
Kind Regards.
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