What do the call statuses mean?
Every Twilio call has a Status value which describes the current state of the call. The call Status may change over the course of the call, and it’s value is submitted to your server in realtime with each TwiML request Twilio makes to your server.
When placing calls with the REST API this is a typical sequence of Status values:
All new calls are created with a status of
queued, indicating Twilio plans to make the dial
A short time later Twilio dials the call, and the status is updated to
When the call is answered the status becomes
After an answered call ends it has a
completedstatus. Since the call is over the Status will always remain in this state
Although the above represents a common call flow, other Status values are possible:
Twilio dialed the number and received a busy signal
Twilio dialed the number but no one answered before the Timeout value elapsed
The call was canceled using the REST API
Twilio’s carriers could not connect the call, most likely because the phone number was entered incorrectly
If a call has a Status of
canceled, you should not be charged for the call. If a call is
completed, you will be charged.
completed indicates that a connection was established and audio data was transfered. Most of the time this means that someone answered the phone, but it could also mean that the a connection was made to a voicemail system, or that something else happened that required the transfer of audio.
The documentation also provides a list of the possible values for the Status parameter.