Mitel (Inter-Tel) 5000 and Axxess
Control from the administration extension only, which is the phone that controls day/night mode switching
Leave receiver down
Dial 8800
If this is not successful dial 9800 or 19800 in case you do not have a standard internal numbering plan
Press # to confirm date
Enter time in HHMM
Press AM or PM
Please contact us should you require any further assistance