Siemens Hicom 100e (112-118) Series
At System Manager Extension (200 or 11 usually)
1.-
Dial *94
2.-
Press Tick to enter
3.-
Scroll to TIME & tick
4.-
Tick to alter time
5.-
Dial In The Time ie HHMM
6.-
Press Tick & lift handset & release
Siemens Hicom Office Series
At System Manager Extension (201 or 21 usually)
1.-
Dial *95
2.-
Display reads "Enter User "
3.-
Dial *95 & tick
4.-
Scroll to TIME & tick
5.-
Tick to alter time
6.-
Dial In The Time ie HHMM
7.-
Press Tick & lift handset & release