Please follow the steps below for your particular Iwatsu system.
ADIX
From the Operator DSS when idle:
Press [ICM] + [FEAT] + [6] + [4]
Enter the time [HH MM] using the 24 hour military clock
Press [SPKR]
From the Attendant Console when idle:
Press [ETC] + [ETC] + [ETC] + [F1]
Enter the time [HH MM] using the 24 hour military clock
Press [RLS]
ZT-D
From the operator only when idle:
Go off-hook and press [FEAT] + [SPKR] + [3]
Enter the time [HH MM] using the 24 hour military clock
Go on-hook
ZT-S
From the Master KT only, when idle:
Go off-hook and press [FEAT] + [#] + [2]
Enter the time [HH MM] using the 24 hour military clock
Go on-hook
IDS-128
From Console:
Press [PROG] then [3] then [SET]
Enter the time as HH + [SP] + MM + [SP] + [*AM] or [*PM]
Press [SET] then [PROG]
EX-816/824/1648 - Versions 1 and 2
From the Station 20 when idle:
Go off-hook and press [FEAT] + [5]
Enter the time [HH MM] using the 24 hour military clock
Go on-hook
EX-816/824/1648 - Version 3
EX-1232/2464 - Versions 1 and 2
From the Station 20 when idle:
Go off-hook and press [FEAT] + [8] + [1]
Enter the time [HH MM] using the 24 hour military clock
Go on-hook
TXX-616 and EX-616
From the Station 20 when idle and on-hook:
Press [0] + [3 digit password] + [program number 00]
Enter the time [HH MM] using the 24 hour military clock
Press [FWD] + [FLASH] + [FLASH]