User`s manual

100-M0171X3 29 of 95
GMS Inc. doing business as Cobham Tactical Communications and Surveillance
www.cobham.com/tcs
Note: If only one audio channel is active and the other is OFF then only the volume
adjustment for the active channel can be made. If both audio channels are active then
continue with step 4 below to switch to the other audio channel.
4) Use the left and right keys, “→ ←”, to change between the different active audio channels which
are displayed in the Numbered LEDs section ( 1&2, or 3&4), depending upon the group
configuration).
5) Use the up and down keys, “↑↓”, to increase/decrease the audio volume. Zero (0) value indicates
volume is at lowest power and nine (9) is at maximum.
6) Press the ENTR key to accept the new value.
 NOTE: Settings will not change until the ENTR key is pressed. If the current setting is re-
selected, if the panel times out, or if the mode key is pressed then the M2TE will keep to the old
setting without any disturbance to the M2TE operation.
6.6.4 ENCRYPTION (THE “KEY” Green LED)
 NOTE: There are a few guidelines associated with encryption which the user needs to be
aware of to have a better understanding of how the encryption MODE “ “LED works:
A. Encryption is a purchased option. If it hasn’t been purchased then in the LAN GUI under the
“Encrypt” tab in the Configuration Groups/ Setup menu the encryption mode & key buttons
are grayed out. If this is the case then the encryption MODE ” “ key LED is skipped
over when pressing the “MODE” button.
B. Encryption must be set to either “AES/128” or “AES/256”(this is a generic term, AES
encryption modes will vary depending on which AES options have been purchased; the
modes are listed under the “Encrypt” tab in the Configuration Groups/Setup menu) using
the LAN GUI interface. Once the AES ENCRYPTION MODE has been activated from the LAN
GUI the STATUS encryption “ ” key (yellow LED) on the front panel lights. The
encryption keys (up to 5 keys) should also be pre-set using the LAN GUI.
C. If the encryption MODE key “ ” LED lights the user is then able to change to a pre-
defined key, up to 5 different keys using the control panel arrow keys (↑↓→ ←). In addition
the user is also able to turn the current AES mode to OFF by selecting the zero (0) value using
the control panel arrow keys (↑↓→ ←). Or if the current mode is OFF the user can turn it back
ON by selecting one of the 5 pre-defined keys. Keep in mind the functions described here in
step C depend on step B above to be true.
With an understanding A, B & C above the following is the basic operation of the Encryption MODE
using the front control panel:
1) Press the MODE key until the KEY “ ” LED is blinking. The value which appears in the
Numbered LEDs section indicates the current encryption key or if a zero (0) value the current
encryption mode is OFF (in which case the STATUS LED “ ” is also OFF).
2) Use the arrow keys, “→ ←↑↓” to select a different encryption key (1 through 5). The STATUS LED
next to the key” ” turns ON if a value other than zero (0) is selected. If zero (0) value is
selected then the STATUS LED turns OFF.