Tyco Electronics MM102014V1 - Manual (Page 47)

MM102014V1, Rev. G
The key must be pre-determined by the users prior to making a manually encrypted call on
a talk group. It can be between one and sixteen (1 - 16) digits and it is entered into the
radio using the keypad on the DTMF microphone.
If two communicating radios have different (manually-defined) keys, receive audio at
each radio will sound garbled.
With manual encryption enabled, unencrypted radio users on the talk group can still make standard voice
(unencrypted) calls on the talk group. However, if an unencrypted user attempts to transmit on the talk
group when one of the encrypted users is already transmitting on the talk group, the unencrypted radio
will sound a deny tone and “No Access” will appear in the display. Also, the encrypted user can hear
standard unencrypted calls, but cannot respond while still manually encrypted.
CAUTION
Do not set a talk group for manual encryption if it has been set for encryption by
the network administration personnel.
Perform the following to transmit or receive manually encrypted calls:
1. Press *32 on the DTMF microphone keypad.
2. Enter the key (up to 16 digits).
3. Press the # key.
There is a two (2) second delay between entering the encryption key and manual
encryption feature taking affect.
4. To end manual encryption, press *33#.
If a user is engaged in a call on a talk group that has been manually encrypted at the radio level, the user
will see “Secure Call” on the bottom of the dwell display.
If a secure (encrypted) call is in progress, and the user has not entered the key, the bottom of the dwell
display will alternate between “No Access” and the alias of the radio that is currently engaged in the
secure call.
Once the user has terminated manual encryption, “UnSecure” appears temporarily in the bottom line of
the dwell display.
5.20 PRESET BUTTONS
The front panel contains three buttons labeled A, B, and C. By holding one of these buttons down for
approximately three (3) seconds, the following current information is saved to the function of that button:
• Selected talk group
• Selected profile
• Selected priority talk group
• Lockouts
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