13.3.4.6. Announcement for Automatic Camp-on on Busy Station 
Synchronized announcements are only possible for incoming digital
trunks. Synchronized announcements are also possible for analog trunks,
if the busy station is an Anate or Digite.
- Has the COT parameter ABNA been set for the connecting line?
- Are you sure that the COT parameter IFR is NOT set for the connecting line?
- Has the COT parameter KNDI been set for the connecting line?
- Does any other station camp-on this busy station?
- Has "Call forwarding when busy" not been activated for the busy station?
- Can the busy station be camped on?
- If the busy station is a functional terminal, has the COS parameter MULTRA not been set?
- Is the announcement reason (ANKNOCK) entered in the ANNTONE branch in the AMO-SYNCA?
- Have the correct entries been made in the announcement reason/announcement
type table, ANNMITR? (SYNCA)
- For direct dialing to the busy station, the appropriate announcement type must be entered for the ANNBUSY announcement reason in the ANNMITR table for the ITR number of the busy station.
- For direct dialing to the busy station via internal FWD/FBSY, the appropriate announcement type must be entered for the announcement reason ANCAMPON in the ANNMITR table for the ITR number of the forwarding party. However, this only works for forwarding stations in the same node as the announcement unit or in homogeneous OS4k networks, where the partner node can provide the ITR group information for the redirecting station. Otherwise, the ITR number of the called, busy station user applies.