Regions

To ensure optimal call quality and support mixed channel calls within applications and PSTN, it is necessary to utilize the closest regional data center. Vonage offers three geo locations:

• US
• EU
• APAC

Each of these locations has two regional endpoints. Calls originating from different geo locations cannot be merged, and user data from one geo-location is not accessible in another due to compliance requirements. Calls processed in the different regions within a geo location can be merged, but it is advised to keep them within a single region whenever feasible to minimize latency.

Application Configuration

You can use the following steps to ensure your phone (PSTN) and SIP calls are being processed in a specific data center:

1. Open the Developer Dashboard and go to Applications.
2. Create a new application, or find an existing voice application and select Edit.
3. Under Capabilities, ensure that Voice is enabled.
4. Under Voice, find the Region setting and select the appropriate regional endpoint:

5. Save your changes.

All inbound calls to the LVN or Programmable SIP domains assigned to that application will be handled in the selected region.

Outbound calls created with the Voice API or Client SDKs will be handled in the region corresponding to the endpoint used. If api.nexmo.com is used, the call leg will be established in Virginia by default.

Regional URLs

If a call is created with a geo or region specific URL, it will be processed in the region corresponding to the endpoint used:

• api-us.vonage.com: Virginia, or Oregon in case of fallback
  • api-us-3.vonage.com: Virginia
  • api-us-4.vonage.com: Oregon
• api-eu.vonage.com: Dublin, or Frankfurt in case of fallback
  • api-eu-3.vonage.com: Dublin
  • api-eu-4.vonage.com: Frankfurt
• api-ap.vonage.com: Singapore, or Sydney in case of fallback
  • api-ap-3.vonage.com: Singapore
  • api-ap-4.vonage.com: Sydney

For in-app calls, the Client SDK can be configured to send and receive calls in a particular region using the same regional URLs.