Call forwarding and simultaneous ring are connected in terms of function but not synonymous. Call forwarding is a feature of call management where incoming calls are forwarded to a specific number or department once the receiver of the incoming call is unavailable. On the other hand, a simultaneous ring is a type of call forwarding, wherein if inbound calls are flocking a phone number and can't be answered by the receiver, then it's directed to other phone numbers assigned to handle the influx of calls, all at the same time. With RingCentral, the simultaneous ring function is called 'Ring all at once.'