SIP 301 Moved Permanently vs 420 Bad Extension
SIP 301 (Moved Permanently) is a 3xx Redirection response, while 420 (Bad Extension) is a 4xx Client Failure response. 301 indicates that the user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header. In contrast, 420 means that the server did not understand the protocol extension specified in a Require or Proxy-Require header. The Unsupported header lists the unknown extensions.
คำอธิบาย
The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
เมื่อคุณพบเห็น
When a user has permanently changed their SIP address. All future calls should be directed to the new URI.
วิธีแก้ไข
Update your address book or routing tables to use the new Contact URI provided in the response.
คำอธิบาย
The server did not understand the protocol extension specified in a Require or Proxy-Require header. The Unsupported header lists the unknown extensions.
เมื่อคุณพบเห็น
When the request includes a Require header with SIP extensions that the server does not support.
วิธีแก้ไข
Check the Unsupported header in the response. Remove the unsupported extension from the Require header or make it optional via Supported.
ความแตกต่างหลัก
301 is a 3xx Redirection response, while 420 is a 4xx Client Failure response.
SIP 301: The user can no longer be found at the address in the Request-URI. The client should direct future requests to the new address in the Contact header.
SIP 420: The server did not understand the protocol extension specified in a Require or Proxy-Require header. The Unsupported header lists the unknown extensions.
You encounter 301 when when a user has permanently changed their SIP address. All future calls should be directed to the new URI.
You encounter 420 when when the request includes a Require header with SIP extensions that the server does not support.
ควรใช้อันไหนเมื่อไร
For 301 (Moved Permanently): Update your address book or routing tables to use the new Contact URI provided in the response. For 420 (Bad Extension): Check the Unsupported header in the response. Remove the unsupported extension from the Require header or make it optional via Supported.