SIP 180 Ringing vs 505 Version Not Supported
SIP 180 (Ringing) is a 1xx Provisional response, while 505 (Version Not Supported) is a 5xx Server Failure response. 180 indicates that the UA receiving the INVITE is trying to alert the user. This response is used to initiate local ringback tone at the caller's end. In contrast, 505 means that the server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
Deskripsi
The UA receiving the INVITE is trying to alert the user. This response is used to initiate local ringback tone at the caller's end.
Ketika Anda Melihatnya
During call setup when the callee's phone is ringing. You should hear a ringback tone after receiving this response.
Cara Memperbaiki
No fix needed — the callee's device is ringing. If the call never connects after ringing, check the callee's device or call forwarding settings.
Deskripsi
The server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
Ketika Anda Melihatnya
Extremely rare. Would occur if a client sends a request with a SIP version other than 2.0.
Cara Memperbaiki
Ensure your UA uses SIP/2.0 in the request line. This is the only standardized version.
Perbedaan Utama
180 is a 1xx Provisional response, while 505 is a 5xx Server Failure response.
SIP 180: The UA receiving the INVITE is trying to alert the user. This response is used to initiate local ringback tone at the caller's end.
SIP 505: The server does not support the SIP protocol version that was used in the request. Currently only SIP/2.0 is standardized.
You encounter 180 when during call setup when the callee's phone is ringing. You should hear a ringback tone after receiving this response.
You encounter 505 when extremely rare. Would occur if a client sends a request with a SIP version other than 2.0.
Kapan Menggunakan Yang Mana
For 180 (Ringing): No fix needed — the callee's device is ringing. If the call never connects after ringing, check the callee's device or call forwarding settings. For 505 (Version Not Supported): Ensure your UA uses SIP/2.0 in the request line. This is the only standardized version.