Moxa ANT-WSB-ANM-05 Manuel D’Utilisation
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2009 Industrial Wireless Guidebook
Cellular Networks
3
From LAN to WAN
We now switch the role of the Ethernet device from TCP Server to TCP Client:
Now the OnCell device is a gateway for the TCP Client to route its traffic to the public domain through the
cellular network. The NAT function built into the OnCell device allows the WAN and LAN interfaces to direct
traffic to each other. The Ethernet device can now locate the server on the public domain to establish a remote
connection. For example, multiple Ethernet devices at a remote site can act as TCP clients and all connect to
the same server in the control center for central management.
cellular network. The NAT function built into the OnCell device allows the WAN and LAN interfaces to direct
traffic to each other. The Ethernet device can now locate the server on the public domain to establish a remote
connection. For example, multiple Ethernet devices at a remote site can act as TCP clients and all connect to
the same server in the control center for central management.
When the OnCell is acting as a client, its WAN IP address will not be limited to public WAN IP addresses. The
WAN IP address of the OnCell IP modem can be public or private, static or dynamic without any extra settings.
WAN IP address of the OnCell IP modem can be public or private, static or dynamic without any extra settings.
How to configure the OnCell as a gateway to the public domain
For the OnCell G3100 series, you do not need to perform extra settings to use the OnCell as a gateway for
connected Ethernet devices to be able to access the public internet. The built-in NAT function is enabled by
default, so by simply setting the default gateway IP address of the Ethernet device to the OnCell’s LAN IP
address, the Ethernet device will be able to connect to the Internet and initiate TCP connection requests to the
TCP server.
connected Ethernet devices to be able to access the public internet. The built-in NAT function is enabled by
default, so by simply setting the default gateway IP address of the Ethernet device to the OnCell’s LAN IP
address, the Ethernet device will be able to connect to the Internet and initiate TCP connection requests to the
TCP server.
Please note that if you are going to be accessing a domain name on the Internet, not only do you need to set
the OnCell as your default gateway, but a public DNS server is also required for domain name access.
the OnCell as your default gateway, but a public DNS server is also required for domain name access.
The OnCell can be both TCP Server and TCP Client
In some applications, Ethernet devices act in both the server and the client role. In these cases, the OnCell
can play both roles as well. The virtual server settings and gateway settings can be used simultaneously in the
same way a traditional router can forward traffic in both directions. As shown in the network diagram below,
you only need two OnCell devices for two Ethernet devices to communicate with each other. The Ethernet
devices do not need to be located in a hardwire Internet-ready area as long as there is a cellular signal present
and the TCP Server/Client pair of the OnCell device can bridge a LAN connection.
can play both roles as well. The virtual server settings and gateway settings can be used simultaneously in the
same way a traditional router can forward traffic in both directions. As shown in the network diagram below,
you only need two OnCell devices for two Ethernet devices to communicate with each other. The Ethernet
devices do not need to be located in a hardwire Internet-ready area as long as there is a cellular signal present
and the TCP Server/Client pair of the OnCell device can bridge a LAN connection.