NEC Electra Elite 48/192 Features And Specifications Manual page 469

Issue 6
P - 12
General:
Confirmation tone is not heard while dialing.
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When a digit is not dialed within 10 seconds, this feature is
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automatically canceled.
Pauses cannot be entered while dialing.
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A maximum of 24 digits can be displayed.
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A call originating using this feature is canceled when the Redial key,
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Hold key, Transfer key, or Recall key is pressed.
The LCR feature is in effect when using Prese tDialing.
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Electra Elite
Preset Dialing