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Call Statuses

This topic explains call statuses like started, ringing, answered, rejected, busy, unanswered, timeout, failed, complete and machine. Since everyone is familiar with the phone, these concepts are pretty straightforward.


Each call goes through a sequence of statuses in its lifecycle:

A call may pass from Started to Ringing to Answered to Complete but there are many different sets of sequences for statuses in a call's lifecycle. Below is a schematic diagram outlining all possible paths.



Here is the list of all call statuses:

These statuses are valid for all 1:1 call combinations such as IP to IP, IP to PSTN, PSTN to IP.


While Nexmo, the Vonage API Platform strives to provide the most accurate status, we have little to no control over statuses like busy, rejected, unanswered and failed, most of which depend in the largest part upon the carriers themselves. More specifically, a call might not be completed because the callee was on another line(busy) but it is relayed as rejected by the carrier.