SIP Response Messages
B-3
SIP Response Messages
SIP Response
Messages
Category
The VOCAL system supports all SIP response messages:
• 1xx Responses - Information Responses
• 2xx Responses - Successful Responses
• 3xx Responses - Redirection Responses
• 4xx Responses - Request Failures Responses
• 5xx Responses - Server Failure Responses
• 6xx Responses - Global Failure Responses
For More
Information
Refer to the SIP RFC 2543 for a list of the status codes and their reason
codes:
http://www.ietf.org/rfc/rfc2543.txt
1xx and 2xx
Responses
1xx SIP response message are informational responses:
• 100 Trying
• 180 Ringing
• 181 Call Is Being Forwarded
• 182 Queued
• 183 Session Progress
• 200 OK
3xx Responses 3xx SIP response message are redirection responses:
• 300 Multiple Choices
• 301 Moved Permanently
• 302 Moved Temporarily
• 303 See Other
• 305 Use Proxy
• 380 Alternative Service
4xx Responses 4xx SIP response message are client error responses:
• 400 Bad Request
• 401 Unauthorized
• 402 Payment Required
• 403 Forbidden
• 404 Not Found
• 405 Method Not Allowed
• 406 Not Acceptable
• 407 Proxy Authentication Required
• 408 Request Timeout