Forum Discussion
Graph API: create a PSTN call and invite a PSTN participant
Hello everybody, We are using the MS Graph API within a C# project. After successful creating a PSTN call from our bot like described here https://docs.microsoft.com/en-us/graph/api/application-...
Sayali-MSFT
Microsoft
Microsoftadrianpopa - We are confirm with the engineering team ,if bot wants to invite another PSTN to join, the P2P call will be escalated into a group call. So far we don't support escalation by adding PSTN. We are working on this feature now and it will be ready soon.
So, here are some scenarios:
1. P2P call between Bot and another peer (Teams user, PSTN), bot invites another PSTN: Not supported.
2. P2P call between Bot and another peer (Teams user, PSTN), bot invites another Teams user: Supported.
3. P2P call between Bot and another peer (Teams user, PSTN), bot invites another bot: Supported.
So, here are some scenarios:
1. P2P call between Bot and another peer (Teams user, PSTN), bot invites another PSTN: Not supported.
2. P2P call between Bot and another peer (Teams user, PSTN), bot invites another Teams user: Supported.
3. P2P call between Bot and another peer (Teams user, PSTN), bot invites another bot: Supported.
I would like to add to the scenario adrianpopa, there is a difference in how the group call was created.
A) When having a group call where the 'escalation part' is done by inviting a Teams user, you cannot invite a PSTN participant.
B) When having a group call where the 'escalation part' is done by inviting a PSTN user, you can invite another PSTN participant.
I noticed there is a slight difference in the calls (by requesting info via graph) before requesting the 4th particpant depending on the scenario:
A ChatInfo null,
B ChatInfo not null
A meetingCapability null
B meetingCapability not null
A pstnDetails null
B pstnDetails not null (altough the values are guid's with all '0' and dialinUrl null)
The only difference here is that A uses POST /participants/invite with a azure id, and B with a phone number (before requesting an additional participant with PSTN)
A) When having a group call where the 'escalation part' is done by inviting a Teams user, you cannot invite a PSTN participant.
B) When having a group call where the 'escalation part' is done by inviting a PSTN user, you can invite another PSTN participant.
I noticed there is a slight difference in the calls (by requesting info via graph) before requesting the 4th particpant depending on the scenario:
A ChatInfo null,
B ChatInfo not null
A meetingCapability null
B meetingCapability not null
A pstnDetails null
B pstnDetails not null (altough the values are guid's with all '0' and dialinUrl null)
The only difference here is that A uses POST /participants/invite with a azure id, and B with a phone number (before requesting an additional participant with PSTN)