LevelOne VOI-7100 - Manual (Page 20)

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If you need to add a phone number into the Speed Dial list, you need to enter
the position, the name, and the phone number (by URL type). When you
finished a new phone list, just click
the “Add Phone” button.
If you want to delete a phone number, please select the phone number you
want to delete then click “Delete Selected” button.
If you want to delete all phone numbers, please click “Delete All” button.
Example
Press [2] [#] on telephone to Speed Dial the phone number 2 immediately.