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6.3 Connection to a Network
Ngara can be connected directly to a free Ethernet port on a Local Area Network (LAN). This is the preferred
connection method.
Special care must be taken in setting up the network settings on Ngara to ensure there are no conflicts with other
devices on the network. The simplest way to achieve this is to set Ngara to DHCP IP mode. See Section 4.4.3.2.
When using this method of connectivity, the suggested configuration options are show in Table 26.
Linking to Ngara is then achieved by entering the IP address allocated to the unit. The address allocated by Ngara
can be viewed through the LCD, refer to Section 4.4.3.3. See Section 5.3 for details on using the Remote Host
application to link to a Ngara.
6.4 Connection to 3G/4G
Ngara can be connected to a modem, providing communication over 3G or 4G.
Special care must be taken in setting up the network settings on Ngara to ensure there are no conflicts with other
devices on the network. The simplest way to achieve this is to set Ngara to DHCP IP mode. See Section 4.4.3.2.
When powered from a battery source, the 3G modem will be required to use the Ngara AUX output connector. This
will ensure the modem can be powered off in the event that the battery voltage drops to critical levels.
When using this method of connectivity, the suggested configuration options are show in Table 27.
System
Ngara
Modem
Linking to Ngara is then achieved by entering the IP address allocated to the modem.
There are a number of different ways to determine this IP address, either through a third party dynamic name
resolution service, or by using a static IP address. In both instances it is imperative that the SIM card provided is
capable of obtaining a public IP address
there is no requirement to obtain a public IP address
The local IP address provided to Ngara by the modem must also remain constant to ensure the configured port
forwarding rules remain valid.
Additional settings must also be provided to the modem to ensure that each Ngara is capable of interrogating current
status over a standard telnet session.
4
When using Telstra SIM cards, access to their extranet network must be granted.
5
Ngara will not be accessible using the Remote Host in this configuration.
Version — 25-7cd7566
Table 26: Direct Connection Settings
System
IP Setting
Ngara
Set to DHCP mode. See Section 4.4.3.2.
Desktop PC
No configuration changes required
Table 27: Direct Connection Settings
IP Setting
Set to DHCP mode. See Section 4.4.3.2.
DHCP Enabled, address assigned by MAC, interrogation allowable via
telnet to a preconfigured ngara user, and port forwarding configured
as per details in Section 6.1.
4
. If connection to Ngara is not required, in the case of Noise Cloud only,
5
.
Ngara
User Manual
Page — 70 of 80
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