Mitel LDP7008D - Manual (Page 35)

Ring
7008D User Guide | Ring 34
CO Ring
This feature allows you to differentiate the way that your phone
rings on intercom calls to the way it rings on inbound external
calls
1. Press the button and select option [1] RING followed
by option [9] CO RING. (Your display should look as per
Fig.34
2. Select options 1-15 (Display shows current settings). RING TONE
DIAL 01-15: 03
Fig.34