User`s manual

Getting Started
NOTE:
If you have the data call indicator set to Yes, the main softkey screen on
the 8510 and 8528 will show the data indicator. For example,
Aug 13, 1992 11:15AM
Data
Press the softkey below Data (only on the 8510 and 8528 display terminal)
to quickly access the data screens.
The Data indicator on the 8520 display terminal screen is only an indicator
to show that a data call is in progress.
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