responses when a user equipment (UE) fails to register. The header may reveal that the failure was due to an SBC policy or a specific CSCF internal state. Call Drops and Cancels:
A code of x-zte-cause: 0 does not mean "no error." In many ZTE firmware versions, 0x0 indicates a "silent reject" – the device deliberately fails without triggering a standard error path. x-zte-cause
The content of the header often follows a format that includes the node type and a string of identifiers: X-ZTE-Cause: "CSCF-6503" X-ZTE-Cause: "SBC-4409" responses when a user equipment (UE) fails to register
: An "X" over the signal bars often indicates a total loss of data or cellular stream. You can try toggling Airplane Mode off and on or performing a Network Settings Reset via the HONOR Support Guide to re-establish connection. The content of the header often follows a
In a complex IMS environment, a standard SIP error code (like 403 Forbidden 500 Internal Server Error