4-2
RF-7800B
CONFIGURATION
4.2.2 RF-7800B-DU024 Land Portable BGAN Terminal
RF-7800B-DU024 additional capabilities are:
• ISDN Power: The ISDN interface provides power to the connected ISDN device. If there is no operational
device connected to it within five minutes, the ISDN power will be turned off, in order to save power. The
ISDN interface can be re-enabled from the Web interface when an ISDN device is connected.
4.3 BGAN TERMINAL MODES OF OPERATION
BGAN Terminals have three modes of operation:
• NAT Mode (for direct computer connection(s))
• Relay Mode (for direct Router connection)
• Bridge Mode (for direct Harris Radio connection)
4.3.1 NAT Mode
The RF-7800B NAT Mode enables the use of directly connected computers to access the BGAN Network. Up to 11
computers can be directly connected to the BGAN Terminal (when more than one computer is connected, a network
hub/switch will be required). This allows each computer to independently control its own connection to the BGAN
network, enabling each computer to access up to 492 kbps throughput. See Figure 4-1 for the NAT Mode of
operation. In this case, each computer can use the Web interface to create a specific network connection specifically
for data between that computer and the BGAN network.
Each computer will receive an IP address from the BGAN Terminal's DHCP Server, normally providing private non-
routable IP addresses in the 192.168.128.101-199 range. Internally, the BGAN Terminal performs a Network
Address Translation (NAT) on each computer's IP address, and will utilize the public IP address it receives from the
BGAN Service Provider to enable normal Internet access for each connected computer.
Figure 4-1. NAT Mode Connections
CL-0365-4200-0038
NAT MODE
HUB/SWITCH*
BGAN ETHERNET CABLE,
12043-0833-XXX
ETHERNET CABLE
* UP TO 11 DIRECTLY CONNECTED COMPUTERS.
EACH PC CAN ACCESS UP TO 492 KBPS THROUGHPUT.
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