Mitel networks 5240 User Manual page 26

Diverting your calls using SETTINGS
To divert all your calls to an external destination using SETTINGS:
Diverting your calls using a programmed key
To divert all your calls to an external destination using the EXTERNAL DIVERT key:
Diverting your calls using the feature access code
To divert all your calls to an external destination using the External Divert feature access code:
Diverting your calls to the last External Divert destination dialled
To divert your calls to the destination you dialled when you last used External Divert