Hi @jw
Teams Phone tag is mainly focused on the general issue of Microsoft Teams Phone troubleshooting. According to your description, your question is related to Graph API which is not in our support scope. To better help you solve your problem, please add the Graph API tag to your post.The following suggestion is for your reference:
callType Indicates the type of the call. Possible values are: unknown
, groupCall
, peerToPeer
, unknownFutureValue
.
Please refer to this: Supported call types
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