Chapter 1 • Introduction
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1037073-0001 Revision E
a national network of dial access numbers, which serve as Virtual
Private Network (VPN) entry points into your network or the
Internet.
VADB introduces no additional load on the HN7700S, does not
affect other HN7700S features, and all applications will work, but
data is sent and received at a slower rate.
Optional protection module
Some countries may require installation of a protection module
between the HN7700S remote terminal and the public switched
telephone network (PSTN) telephone line. As of the date of this
manual, only Brazil requires the use of this optional protection
module.
For installation instructions for the optional VADB protection
module, contact your service provider.
Using the HN7700S with serial
devices
The HN7700S 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 HN7700S 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 as
shown in Figure 5. A Hughes serial appliance connected to a
remote terminal Ethernet port can support multiple serial devices.
Figure 5: Typical serial device application
DCE serial cable
with 25-pin male
connector
Serial
device
T0156005
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