Sierra Wireless 20070914 - Manual (Page 84)

Data Communication and Host Modes
Rev 3.0B Feb.08 71
Data Communication
Note: The PinPoint X forwards
messages to and from the
cellular network for only ONE
device per port. The PinPoint X
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 PinPoint X 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 PinPoint X obtains its IP address from AT&T, it also
obtains the network routing information necessary to forward
messages to their routers which can then forward on from
there. The PinPoint X 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 Ethernet port and 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.
Public and Private Mode
In Public Mode, the PinPoint X 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 PinPoint X.
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 PinPoint X will
use NAT to forward packets to the end device.
Tip: When using Public mode, Sierra Wireless recommends
connecting the modem directly to the computer or other end device.
Using a hub or switch may prevent the PinPoint X 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.