ashtech HDS800, Reference Manual

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Ethernet Connection
The IT Manager may also create a host name for the receiver.
The choice of using or not using the DHCP mode within the
local network, and the consequence of this choice on which
information to provide to the remote system for the
connection are also the decision and responsibility of the IT
Manager. When DHCP is used, an account may be opened on
DynDNS.com to track the dynamic IP address assigned by the
ISP to the receiver’s public access point. See Creating an
Account on Dyn.com on page 91.
TCP/IP Connection
Through the Public
Internet
In this case of use, the receiver and the remote system are
connected to different local networks. Here the
communication will necessarily take place through the public
Internet.
The connection diagram typically is the following.
Ethernet cable
Hub or
Switch
Public IP address
Local Network
Local Network
P/N 702426
Ethernet cable
RJ45
Hub or
Switch
Public Internet
HDS800
Gateway
or ADSL
Modem
Gateway
or ADSL
Modem
Remote
System
Ethernet port