Hello there
I'm trying to initiate a call to a PSTN phone using this example from the communications part of the MS Graph API.
using this example: Create peer-to-peer PSTN call with application hosted media . But I always get a: "Call source identity invalid."
I have made a detailed explanation in this Github Repo
Trying other types of identity, we have been able to establish a call, only to have et quickly declined with a:
Rejected call as reverse number lookup for global user failed.. DiagCode: 403#10144
More info could be found here on an issue comment
Best regards
Søren Lund