SIP 302 Moved Temporarily vs 420 Bad Extension
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 420 (Bad Extension) is a 4xx Client Failure response. 302 indicates 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. 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.
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.
Deskripsi
The server did not understand the protocol extension specified in a Require or Proxy-Require header. The Unsupported header lists the unknown extensions.
Ketika Anda Melihatnya
When the request includes a Require header with SIP extensions that the server does not support.
Cara Memperbaiki
Check the Unsupported header in the response. Remove the unsupported extension from the Require header or make it optional via Supported.
Perbedaan Utama
302 is a 3xx Redirection response, while 420 is a 4xx Client Failure response.
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.
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 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
You encounter 420 when when the request includes a Require header with SIP extensions that the server does not support.
Kapan Menggunakan Yang Mana
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. 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.