RLXIC-SG
♦
Intelligent Cellular
Data Communication and Host Modes
RadioLinx Intelligent Cellular Serial Modem for Global GPRS/GSM
User Manual
Page 60 of 136
ProSoft Technology, Inc.
May 29, 2009
AT Command
Hybrid Mode (MD5)
Hybrid Mode2 (MD6)
MD 3
3
S82 2
2
S0 1
1
*UDPLAST 0
1
7.4 Data
Communication
Note:
The RLXIC-SG forwards messages to and from the cellular network for only ONE device per
port. The RLXIC-SG is a one-to-one gateway, and does not have advanced routing features
required to do one-to-many routing.
The primary purpose of the RLXIC-SG is to forward data from a single device
connected to one of the ports to the cellular network, and, ultimately, under most
circumstances, to the Internet in a
one-to-one
gateway configuration.
When the RLXIC-SG obtains its IP address from your cellular provider, it also
obtains the network routing information necessary to forward messages to their
routers which can then forward on from there. The RLXIC-SG then acts as a
router for the device connected to it, forwarding to or from the cellular network.
Note:
If you have a device connected to the serial port and the USB port, they will not be able to
communicate to each other. Each port is routed separately to the cellular network with one-to-one
routing for each.
7.4.1 Public and Private Mode
In Public Mode, the RLXIC-SG will pass the IP address assigned by the cellular
network to the device connected to its port. Public Mode is the default mode for
the RLXIC-SG.
If you need more control over which gateway address, device address, and
netmask that is given out by the internal DHCP server, you can use the private
host mode, *HOSTPRIVMODE, and set the internal network IP addresses. The
RLXIC-SG will use NAT to forward packets to the end device.
Tip:
When using Public mode, ProSoft Technology recommends connecting the modem directly to
the computer or other end device. Using a hub or switch may prevent the RLXIC-SG from updating
the IP address of the end device when an IP address is received from the cellular network.
In AceManager, the Private mode settings are part of the
PPP/Ethernet
group.
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