Azure comms, multiple numbers....

Question

I've built an application with integrated telephony that has users in Ireland, so we have an Irish call number in our communications service. So far, so good. The telephony works fine. However, the app is being extended to have users in Chicago too, so we bought and added a Chicago based number to the the comms service. Irish users will not be calling the US, nor vice versa. My query is this: for outgoing calls from the application, how does the comms service know which calling number to use? Must it be explicitly stated in the API request that initiates the call, or does it automatically figure it out based on the recipient number?

Answer 1

Hi @Dylan Olney which Azure Communication Services API are you using for making calls (Calling SDK, Voice SDK)? Are you using direct calling or PSTN calling?

The outbound caller ID (the number shown to the recipient) needs to be explicitly specified in the API call. It doesn't automatically determine which number to use based on the recipient's location.