Table of Contents
Advertisement
APPENDIX B: MG-SIP Session Initiated Protocol (SIP) Message
Support
B-1 Provisional 1xx
Provisional responses, also known as informational responses, indicate that the server contacted is performing some
further action and does not yet have a definitive response. A server sends a 1xx response if it expects to take more
than 200 ms to obtain a final response. Note that 1xx responses are not transmitted reliably. They never cause the
client to send an ACK. Provisional (1xx) responses MAY contain message bodies, including session descriptions.
100 Trying (MG-SIP Support = Yes)
180 Ringing (MG-SIP Support = Yes)
181 Call Is Being Forwarded (MG-SIP Support =No)
182 Queued (MG-SIP Support =No)
183 Session Progress (MG-SIP Support =Yes [Receive Only])
B-2 Successful 2xx
The request was successfully received, understood, and accepted.
200 OK (MG-SIP Support =Yes)
B-3 Redirection 3xx
3xx responses give information about the user's new location, or alternative services that might be able to satisfy the
call(further action needs to be taken in order to complete the request). Note that the MG-SIP does not support
sending of the 3xx messages. It will properly acknowledge receiving 3xx messages from the SIP server.
300 Multiple Choices (MG-SIP Support = No)
301 Moved Permanently (MG-SIP Support = No)
302 Moved Temporarily (MG-SIP Support = No)
305 Use Proxy (MG-SIP Support = No)
380 Alternative Service (MG-SIP Support = No)
B-4 Request Failure 4xx
4xx responses are definite failure responses from a particular server. The client SHOULD NOT retry the same
request without modification (for example, adding appropriate authorization).However, the same request to a
different server might be successful.
400 Bad Request (MG-SIP Support = Yes)
401 Unauthorized (MG-SIP Support = Yes [but not as response to INVITE])
402 Payment Required (MG-SIP Support = No)
403 Forbidden (MG-SIP Support = Yes)
MG-SIP
Page 74 of 75
5/8/2009
Hide quick links:
Advertisement
Table of Contents
