The following are time adjustment instructions for several Phone/Voice Mail Systems.  Choose your system and follow the step by step instructions.

Classic ESI-IVX

1. handset on hook
2. press Prog/Help
3. press Park 3
4. enter the Administrator's Password
5. press 1
6. press 4
7. enter time (HH:MM)
8. select AM or PM by pressing Park 3
9. press # to confirm
10. hang up by pressing speaker

ESI-IVX 128 or 20

1. handset on hook
2. press Prog/Help
3. press Park
4. enter the Administrator's Password
5. press 1
6. press 4
7. enter time (HH:MM)
8. select AM or PM by pressing a scroll key (up arrow or down arrow)
9. press # to confirm
10. hang up by pressing speaker

ESI IVX 42S, 56S, 72E, 128E, 128X, CS-50, CS-100, CS-200, CS-600, CS-1000

1. press Program
2. press Hold
3. enter administrator password
4. press 1
5. press 4
6. press 1
7. enter the time in a 12 hour format
8. select AM or PM by pressing a scroll key (up arrow or down arrow)
9. press # to confirm
10. hang up by pressing speaker