IBM -4900 - Manual (Page 12)

Idle Display
Low Battery Display
The telephone will indicate that the batteries are low (or not installed) by displaying a low battery indi-
cator, on the display.
Dialing Display
As you dial
the display shows the numbers dialed and begins the call timer.
If you dial more than I5 digits, then all the digits will shift to the left:
1
Programming Display
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