Codan 2110 series Reference Manual page 298

CES-128 voice encryptor option
Switching between Corporate secure indexes
NOTE
To switch between Corporate secure indexes while using the CES-128 voice encryptor:
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1
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The default secure mode must be set to Corporate (see
Changing a setting in the Control
secure keys programmed into the transceiver in order to see the Select
Key entry.
Hold SEC, then scroll to Select Key.
The currently selected secure index is shown, followed in brackets by
NOTE the range of Corporate secure indexes that are programmed with a
secure key.
Press .
Enter, or scroll to, the number of the Corporate secure index that you want to use.
List), and you must have at least two
Manpack Transceiver 2110 series Reference Manual
page 112,