SIP 300 Multiple Choices vs 493 Undecipherable
SIP 300 (Multiple Choices) is a 3xx Redirection response, while 493 (Undecipherable) is a 4xx Client Failure response. 300 indicates that the address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint. In contrast, 493 means that the request body was encrypted with S/MIME but the server cannot decrypt it. The server may lack the necessary key or certificate.
คำอธิบาย
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
เมื่อคุณพบเห็น
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
วิธีแก้ไข
Select one of the provided Contact addresses and resend the request to that specific URI.
คำอธิบาย
The request body was encrypted with S/MIME but the server cannot decrypt it. The server may lack the necessary key or certificate.
เมื่อคุณพบเห็น
When using S/MIME encryption for SIP message bodies and the recipient does not have the corresponding decryption key.
วิธีแก้ไข
Ensure the recipient has the correct S/MIME certificate and private key. Consider using TLS for transport-layer encryption instead.
ความแตกต่างหลัก
300 is a 3xx Redirection response, while 493 is a 4xx Client Failure response.
SIP 300: The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
SIP 493: The request body was encrypted with S/MIME but the server cannot decrypt it. The server may lack the necessary key or certificate.
You encounter 300 when when a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
You encounter 493 when when using S/MIME encryption for SIP message bodies and the recipient does not have the corresponding decryption key.
ควรใช้อันไหนเมื่อไร
For 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI. For 493 (Undecipherable): Ensure the recipient has the correct S/MIME certificate and private key. Consider using TLS for transport-layer encryption instead.