User's Manual

GENERAL OPERATION

Secure Communication

General

This transceiver may be optionally equipped to provide secure

communication on some or all channels. This feature encrypts your voice

so that it can be understood only by someone using a transceiver

equipped with a similar encryption device and encryption codes. If your

transceiver has this feature, consult your system operator for more infor-

mation on how it functions in your application.

When a secure call is received or transmitted, is indicated in the

display. Secure communication can be programmed on a per channel

basis to operate in various ways. If equipped with the

C/S (Clear/Secure)

option switch and the current channel is programmed to allow switch

selection, secure communication can be manually enabled and disabled

by that switch. In the receive mode, secure calls may be autodetected or

only calls coded like the transmit signal may be received.

Hardware Key Select

With SecureNet encryption, up to sixteen hardware keys can be

programmed into the transceiver, and then each encrypted channel is

programmed to select a specific hardware key. The hardware key is actu-

ally the location in the transceiver of the encryption key that is used for a

call. The same encryption key may need to be selected in both the trans-

mitting and receiving transceivers for secure communication to occur.

If multiple keys have been programmed, the Hardware Key Select

option switch (if available) can be used to change the key associated with

a channel. This permanently changes the key for the channel (cycling

power or selecting another channel does not re-select the original key).

Therefore, to switch back to the original key, it must be manually

reselected. Proceed as follows to change a key:

1. Select the desired channel. Then press the Hardware Key Select option

switch and “HWKEY x” is displayed. The “x’ indicates the currently

selected key from 0-15.