8.11.1.3. Visual Call Forwarding notification for key system lines 
To have visual call forwarding notification for keyset lines that
have an active forward:
- Activate CFUI in ZAND ALLDATA3:CHANGE-ZAND:TYPE=ALLDATA3,CFUI=YES; (this change also removes Fixed Call Forwarding from the phone menu)
- Ensure ZAND LEDTYPE has a configuration for CALLFWD e.g. CHANGE-ZAND:TYPE=LEDTYPE,CALLFWD=VERYFAST;
INFO:
The feature only works for station (not system) forwarding i.e. via phone
interface or AMO ACTDA.