What is 487 Request terminated?
A “487 request terminated” can be what a UAS will send to the client after the client sends a CANCEL request for the original unanswered INVITE request.
What is a SIP error 487?
The 487 Response indicates that the previous request was terminated by user/application action. The most common occurrence is when the CANCEL happens as explained above. But it is also not limited to CANCEL. There are other cases where such responses can be relevant.
What is SIP rfc3261?
Abstract This document describes Session Initiation Protocol (SIP), an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences.
What are the SIP messages?
SIP messages are of two types − requests and responses. The opening line of a request contains a method that defines the request, and a Request-URI that defines where the request is to be sent. Similarly, the opening line of a response contains a response code.
What does SIP 480 mean?
Temporary Unavailable
What is the meaning of SIP Error 480 – Temporary Unavailable Code? When you receive this error code you can understand that the number is not reachable temporarily.
What does SIP 404 mean?
404 Not Found. The server has definitive information that the user does not exist at the domain specified in the Request-URI. This status is also returned if the domain in the Request-URI does not match any of the domains handled by the recipient of the request. 405 Method Not Allowed.
What is prack in SIP?
SIP PRACK (Provisional Acknowledgement) is a way to enable reliability for SIP 1xx provisional messages (excluding 100 Trying) like 180 ringing and 183 session in progress. PRACK messages are sent from the calling party to to called party, to acknowledge the receipt of a 1xx message.
How many types of SIP messages are there?
There are two different types of SIP messages: requests and responses. The first line of a request has a method, defining the nature of the request, and a Request-URI, indicating where the request should be sent. The first line of a response has a response code.
What error code is 480?
What is the meaning of SIP Error 480 – Temporary Unavailable Code? When you receive this error code you can understand that the number is not reachable temporarily.