SIP 183 Session Progress vs 608 Rejected
SIP 183 (Session Progress) is a 1xx Provisional response, while 608 (Rejected) is a 6xx Global Failure 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, 608 means that an intermediary machine or process rejected the call attempt. Similar to 607 but the rejection comes from the network rather than the end user.
คำอธิบาย
Used to convey information about the progress of the call that is not otherwise classified. Often carries early media (ringback tones, announcements) via SDP.
เมื่อคุณพบเห็น
During call setup, especially in PSTN interworking scenarios. The response may contain SDP for early media like custom ringback tones or IVR prompts.
วิธีแก้ไข
No fix needed — this is informational. If early media is not playing, check codec negotiation and SDP handling in your UA.
คำอธิบาย
An intermediary machine or process rejected the call attempt. Similar to 607 but the rejection comes from the network rather than the end user.
เมื่อคุณพบเห็น
When a network element (not the callee) blocks the call. Used by analytics engines and call-blocking services in the network path.
วิธีแก้ไข
This is a network-level block. Contact the network administrator or carrier to understand why the call was blocked.
ความแตกต่างหลัก
183 is a 1xx Provisional response, while 608 is a 6xx Global Failure 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 608: An intermediary machine or process rejected the call attempt. Similar to 607 but the rejection comes from the network rather than the end user.
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 608 when when a network element (not the callee) blocks the call. Used by analytics engines and call-blocking services in the network path.
ควรใช้อันไหนเมื่อไร
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 608 (Rejected): This is a network-level block. Contact the network administrator or carrier to understand why the call was blocked.