SIP 200 OK vs 488 Not Acceptable Here
SIP 200 (OK) is a 2xx Success response, while 488 (Not Acceptable Here) is a 4xx Client Failure response. 200 indicates that the request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully. In contrast, 488 means that the request was understood but the session description (SDP) is not acceptable. The response may contain a list of acceptable media parameters.
Açıklama
The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
Gördüğünüzde
When a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
Nasıl Düzeltilir
No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions.
Açıklama
The request was understood but the session description (SDP) is not acceptable. The response may contain a list of acceptable media parameters.
Gördüğünüzde
When codec negotiation fails — the callee cannot handle any of the codecs offered in the SDP. Common in interop scenarios.
Nasıl Düzeltilir
Check the Warning header or SDP in the response for acceptable parameters. Add compatible codecs (e.g., G.711 as a fallback) to your offer.
Temel Farklar
200 is a 2xx Success response, while 488 is a 4xx Client Failure response.
SIP 200: The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
SIP 488: The request was understood but the session description (SDP) is not acceptable. The response may contain a list of acceptable media parameters.
You encounter 200 when when a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
You encounter 488 when when codec negotiation fails — the callee cannot handle any of the codecs offered in the SDP. Common in interop scenarios.
Hangisini Ne Zaman Kullanmalı
For 200 (OK): No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions. For 488 (Not Acceptable Here): Check the Warning header or SDP in the response for acceptable parameters. Add compatible codecs (e.g., G.711 as a fallback) to your offer.