SIP 183 Session Progress vs 302 Moved Temporarily
SIP 183 (Session Progress) is a 1xx Provisional response, while 302 (Moved Temporarily) is a 3xx Redirection response. 183 indicates that used to convey information about the progress of the call that is not otherwise classified. Often carries early media (ringback tones, announcements) via SDP. In contrast, 302 means that the callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
Deskripsi
Used to convey information about the progress of the call that is not otherwise classified. Often carries early media (ringback tones, announcements) via SDP.
Ketika Anda Melihatnya
During call setup, especially in PSTN interworking scenarios. The response may contain SDP for early media like custom ringback tones or IVR prompts.
Cara Memperbaiki
No fix needed — this is informational. If early media is not playing, check codec negotiation and SDP handling in your UA.
Deskripsi
The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
Ketika Anda Melihatnya
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
Cara Memperbaiki
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
Perbedaan Utama
183 is a 1xx Provisional response, while 302 is a 3xx Redirection response.
SIP 183: Used to convey information about the progress of the call that is not otherwise classified. Often carries early media (ringback tones, announcements) via SDP.
SIP 302: The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
You encounter 183 when during call setup, especially in PSTN interworking scenarios. The response may contain SDP for early media like custom ringback tones or IVR prompts.
You encounter 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
Kapan Menggunakan Yang Mana
For 183 (Session Progress): No fix needed — this is informational. If early media is not playing, check codec negotiation and SDP handling in your UA. For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests.