RingCentral is a cloud-based virtual PBX system. You can integrate your RingCentral account to initiate calls from TeamGram and get screen popups for incoming calls.
Connecting User’s RingCentral Accounts to TeamGram
Users must connect their RingCentral accounts to their TeamGram accounts before they can initiate calls or receive call notifications in TeamGram.
Ask your users to go to Control Panel > Integrations > User Integrations > RingCentral and follow the instructions.