Siemens Hicom Office Range

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