SIP 180 Ringing vs 403 Forbidden
SIP 180 (Ringing) is a 1xx Provisional response, while 403 (Forbidden) is a 4xx Client 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, 403 means that the server understood the request but is refusing to fulfill it. Authorization will not help. The request should not be repeated.
विवरण
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.
जब आप इसे देखें
During call setup when the callee's phone is ringing. You should hear a ringback tone after receiving this response.
कैसे ठीक करें
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.
विवरण
The server understood the request but is refusing to fulfill it. Authorization will not help. The request should not be repeated.
जब आप इसे देखें
When the server policy denies the request regardless of credentials. Common for blocked numbers, restricted routes, or ACL violations.
कैसे ठीक करें
Check server ACLs and routing policies. Verify the caller is permitted to make this type of call. Contact the server administrator if the block is unexpected.
मुख्य अंतर
180 is a 1xx Provisional response, while 403 is a 4xx Client 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 403: The server understood the request but is refusing to fulfill it. Authorization will not help. The request should not be repeated.
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 403 when when the server policy denies the request regardless of credentials. Common for blocked numbers, restricted routes, or ACL violations.
कब किसका उपयोग करें
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 403 (Forbidden): Check server ACLs and routing policies. Verify the caller is permitted to make this type of call. Contact the server administrator if the block is unexpected.