Origination is usually referred to incoming call. It is the act of handling the original call and then delivering it to you. You would need a phone number (DID / TFN) in order to receive a call and as your phone number is with provider, they handle the incoming call and then route it to you.

UsVoipSols provide reliable Origination access through SIP-based hand-off. Our DID / TFN origination services provide you with access to numbers in many countries which are available for provisioning.