Changing the Time on the Vertical Summit, LG IPECS 80 & 800
System Attendant
1.    Press the [TRANS/PGM] button.
2.    Dial "041", the Attendant Station Program code.
3.    Dial six (6) digits for the Date (MM/DD/YY) or [HOLD/SAVE] 
to skip the Date setup.
4.    Dial four (4) digits for the time (HH/MM) or [HOLD/SAVE] to 
skip the Time setup.
5.    Press the [HOLD/SAVE] button, a confirmation tone is heard 
and the Attendant station returns to idle.