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6866537D87-F Chapter 3 - MTM800 Product Information Manual September 2008
Turn the check box on or off by clicking in the check box.
15.25 Enter Pinlock-Menu Tone
This feature is Enabled/Disabled by clicking in the check box.
16 End to End Encryption
End to End (E2E) encryption, unlike the TEA encryption types, is not an air interface encryption and
is seamless to a system, i.e. it will pass through a system without being decrypted.
As its name implies it is an encryption used between terminal users, both individual and groups.
If TEA encryption is used, the receiving base station must decrypt the incoming message to
determine its destination, but with E2E encryption only the information packet is encrypted, the
addressing information is not. This means that with E2E encryption there is no possibility to
compromise the encrypted information.
16.1 Periodic End-To-End Key Failure Notice
If this box is checked, the user is alerted when ever key failure occurs. The alert is repeated at a
time interval set by the ‘Key Fail Indication Timer’.
16.2 Clear Reception Alert Tone
There are 3 possible options for this feature, including ‘None’ (no tone alert). An alert can either be
sounded at the beginning only, or continually whenever a non-encrypted (clear) call is received.
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