SIP - 2xx: Success Responses

This class of responses is meant for indicating that a request has been accepted. It includes the following responses −

200 OK

• 200 OK is used to accept a session invitation.

• It indicates a successful receipt of a request.

202 Accepted

• 202 Accepted indicates that the UAS has received and understood the request, but that the request may not have been authorized or processed by the server.

• It is commonly used in responses to SUBSCRIBE, REFER methods.