Summary
- 1xx: Provisional response
- SIP request has been received and we are continuing to process the reques
- Provisional responses indicate that we are performing some further action and do not have a definitive response yet.
- For example, a 100 Trying response means that we have received an INVITE and are finding a route for the call. This will immediately be followed by a 180/183 RINGING which may or may not contain message bodies, including session descriptions for audio connections
- 2xx: Success
- An action was successfully received, understood, and accepted
- 3xx: Redirection
- Further action needs to be taken by the initiating party in order to complete the request
- For example, a 302 redirect will direct the party to go somewhere else for the next request
- 4xx: Client Error
- We can not process the request due to bad syntax or it cannot be fulfilled at this server
- This can be seen if an invite is sent to a location which does not know where to route the call.
- 404 NOT FOUND can be returned when a PBX does not have a route for an inbound call
- 5xx: Server Error
- The carrier is unable to fulfill an apparently valid request
- 503 route advance will instruct a client to try the next route
- 6xx: Global Failure
- This is provided if the request cannot be fulfilled
- 603 DECLINED can mean that the account is suspended or out of credit
Resources
Comments
0 comments
Please sign in to leave a comment.