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1. Press the Prefix Configuration button to enter the configuration table.
2. Enter the index number. Put the prefix numbers you will dial in the
prefix table, enable (disable) the drop function and enter the numbers
you want to insert.
The usage is as same as the drop, insert function of the Phone Book.
Input (Prefix) Drop Insert Output
100 Disable X 100
200 Disable 0 0200
300 Enable X X
400 Enable 500 500
3. Press the Prefix Configuration button to reload the configuration table