Hello, how can i configure 3cx to allow different outgoing DID numbers? We do have one voip account with our voip provider (so cannot simply change outgoing routes depending on number dialed, etc.). Using Cisco SPA504G phones. It should be possible to assign ext keys from phone's web interface, but then after fw updates, etc. it would take config from 3cx again. Is there a way to do use different outgoing DID numbers depending on prefix dialed?