Forum Discussion
Outbound calls. couldn't complete the call, check you are using the correct number format
Hi all,
I can't make outbound calls to PSTN, I get this error:
couldn't complete the call, check you are using the correct number format... check with admin blah blah blah
I get the similar error when I call that user number via PSTN from an Australian number.
- I'm on an Australian tenant, user location Australia. User location was set to US so a US number could be assigned then set back to Australia. Have tried setting user back to US, made no difference.
- E1 + Phone System + Domestic and International Calling Plan.
- US phone assigned to the user, since we can only get Australian service numbers. Only using the number as users required to have a number to make PSTN calls.
- I can call my Australian service numbers and the call flow works as expected and the user can take those calls.
- I don't have any dialling plans setup. I didn't think I would need any.
Anyone got any ideas what the problem is?
By documentation an integration needs to be done first with Telstra PSTN service for you to make outbound\inbound PSTN call from Microsoft 365 (S4B\Teams):
- https://docs.microsoft.com/en-us/microsoftteams/country-and-region-availability-for-audio-conferencing-and-calling-plans/availability-in-australia
- https://www.telstra.com.au/business-enterprise/products/unified-communications/collaboration/calling-and-productivity/telstra-calling-for-office-365
Not sure if this is completed prior to your testing, but I'd suggest to contact first Telstra for integration process as you've already provisioned services\user on your end.
Detailed Instruction:
Polite as usual,
BFN
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