Axnes AS
Document number
Revision
Date
AX-PNG-UMAN-1219
Issue C
2018-Jun-05
Page 2-2
Confidential document and information
through PTT/VOX, but it is possible to configure transmit to a secondary group through
configuration and use of the secondary PTT on the handheld.
When the PNG system is set up, one or more configurations are defined, see section 2.2
Configurations.
2.2 Configurations
Both the handhelds and the PNG Base Station use configurations to control the behaviour of
the devices. They can hold a number of configurations, with different operational parameters.
A configuration contains a minimum of the following parameters:
•
Logical name of the configuration
•
Radio parameters (frequency, modulation, and channel bandwidth)
•
Group subscriptions for receive
•
Group subscriptions for transmit
•
Configuration of remote PTT control (handheld activation of PTT from the PNG Base
Station to the intercom)
The different pre-programmed configurations can be selected at start or during mission from
the PNG Control Panel. Typically, there will be several configurations when different radio
channels shall be made available. There can also be different configurations for different
mission types as e.g. SAR and EMS missions.
The different configurations are selected on the PNG Control Panel with a rotary push button,
and identified by the logical name. When selected, all relevant parameters are loaded.
On the handheld, the configuration is selected with the up/down arrows, and identified with a
short two letter name and a long logical name (scrolling display).
Pre-programmed configurations can either be pre-ordered from the equipment vendor, or
changed by a qualified equipment operator with a PC based programming tool.
2.2.1 Encryption
With the PNG system all user data are encrypted according to the AES-256 encryption
standard before they are transmitted over the air. When delivered from factory, the PNG
Base Station uses a default encryption key called “AXNES DEFAULT”. Changing this
encryption key requires the user to acquire an encryption key programming kit. Note that the
PNG Base Station and all handhelds in a system must use the same encryption key in order
to connect and communicate with each other.