2. Using the Field TestDisplayActivation and deactivationThe Field Test Display is located at the end of the main menu loop.It can be activated (or deactivated) in the following way:1 With the display clear, press Menu to enter the menu facility.2 Scroll in the menu main loop to the Net monitor item and pressSelect.3 Enter the index of the test to be activated at the Group/display:prompt or enter 0 to deactivate the Net monitor. The index isshown on the top left corner of the display. Example: If display03 in group 01 should be activated enter 0103 in the prompt.4 Confirm by pressing OK.The field test data will then appear after a moment. The index of thetest will appear on the top right corner of the display.When the Field Test Display is active, the phone works in almost thesame way as it does when the Field Test Display is inactive, exceptthat the keys and scroll through the various tests,whereas they would scroll through the short code memory when theField Test Display is inactive. There may also be some otherdifferences compared to the operation of the normal NPL-1terminal.The Field Test Display appears as a so-called soft indicator, whichmeans that it is visible only if there is nothing else to display. Forexample, once the first digit of a phone number has been entered,the Field Test Display disappears and the entered digit is shown.After the full number has been dialled, the number disappears andthe Field Test Display reappears on the screen.3