GE 29880 User Manual page 34

You may need to adjust the duration of the pause. It can be adjusted from
1 to 9 seconds. The default setting is four seconds.
1. Pick up the handset.
2. Press the Store button.
3. Press the Redial (Pause) button.
4. Press 1-9 (1=1 second, 2=2 seconds, etc.)
5. Press the Store button to save.
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