Hughes DiRECWAY DW7700, Дополнительное руководство пользователя

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Chapter 2 • DW7700 component and feature descriptions
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1036332-0001 Revision C
Port forwarding
The port forwarding feature allows a user to configure the
DW7700 to forward specific TCP and UDP traffic from the
Internet to servers on a LAN. The user accesses the Port
Forwarding Configuration page on the System Control Center to
define the rules for allowing the traffic to reach the servers. For
details, see
Port Forwarding Configuration page on page 28.
Serial devices
The DW7700 remote terminal has one DCE/DTE RS-232 serial
port that supports any type of serial device. Common serial
devices that may be connected to the DW7700 include:
• Point of Sale (POS) devices
•
Credit card readers
•
Automatic Teller Machines (ATMs)
The serial port is programmable for synchronous or asynchronous
operation. A single serial device can be connected to the port. A
DIRECWAY Serial Appliance connected to a remote terminal
Ethernet port can support multiple serial devices.
The serial port supports a variety of protocols. See the service
provider for a list of supported protocols.
Figure 5 illustrates a typical serial device connection to the
DW7700. The figure is for illustrative purposes only and may not
reflect the DW7700 configuration at your site.
Note: HNS recommends the installer work with a point of sale
(POS) technician to verify the physical connection between the
POS device and the serial appliance port. There are many serial
port parameters that must be verified to ensure the POS device and
the serial appliance port are communicating properly. At a
minimum, baud rate, parity, character bits, and stop bits need to be
matched. HNS suggests using a break-out box with 25-pin ribbon
cables to verify the POS device and the serial appliance are
communicating through the physical leads RTS, CTS, CD, DSR,
and DTR.