Call2Teams - Customer
Microsoft PSTN gateways are the servers that sit at the edge of the Microsoft Teams cloud service and route calls between Direct Routing services and the Microsoft platform
It is important to factor in the locations of the Microsoft PSTN gateways for decisions regarding data sovereignty and privacy management. Since there are a limited number of gateways it is possible that the voice traffic for customers will cross international boundaries on its journey across the Microsoft network.
Network routing generally means that from a customer service location (sip trunk or PBX), the voice traffic will take the shortest route onto the Microsoft network, and will then transit to the nearest designated PSTN gateway. The benefit of this is that the voice traffic is safely within the Microsoft cloud and quality and performance is optimised.,
For example, a call from customer in Canada will transit to the USA before ingress to the Microsoft Teams PSTN gateway, although the actual data traffic may hop-on to the Microsoft network within Canada as shown in the diagram below:
Location of gateways
This is the current list of Microsoft PSTN gateways as published on this page at microsoft.com
22.214.171.124 Washington US West
126.96.36.199 Virginia US East
188.8.131.52 Amsterdam Netherlands
184.108.40.206 Dublin Ireland
220.127.116.11 Hong Kong
18.104.22.168 Sydney Australia
22.214.171.124 Melbourne Australia
126.96.36.199 Osaka Japan
188.8.131.52 Tokyo Japan
The service gateways are provisioned to be adjacent to these Microsoft gateways, within the Microsoft Azure cloud so it is aligned to Microsoft's approach to global voice routing
Customers looking at data management and sovereignty should factor-in Microsoft's regional approach used by both the service and Microsoft; customer voice traffic may cross international boundaries to reach the Microsoft Teams service.
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