User A in the SoftCo enables the One Number Link You (ONLY) service and binds user B. User C calls user A. After a short period (several seconds), user A's phone stops ringing and user C hears the announcement indicating that the called user is busy.
Step 1 Check whether user B has enabled the automatic answer function or other supplementary service functions that causes the fault.
The fault also occurs when user A sets the user B for simultaneous ringing and user B has enabled the automatic answer function.
Step 2 If the fault persists, contact Huawei technical support engineers.
The possible cause is that user B has enabled the automatic answer function.