Time Change Instructions for IWATSU 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]
From the Station 20 when idle and on-hook: