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3.4.1 Microsoft Windows Firewalls
The Microsoft Windows® Firewall on the PC may interfere with Vision communication. To assure
communication, follow these steps:
• Enter Control Panel, Security Center.
• On the “General” Tab, be sure that “exceptions” are allowed. (Un-click “Don’t allow
exceptions”.)
• On the “Exceptions” Tab, click “Add Program”.
• Select Vision from the list of programs – click on it. (Vision must be installed to appear on the
list.)
• Click on “OK” at each window to exit Control Panel.
3.4.2 Network Evolution Issues
This document is as correct as possible at the time or writing. However, network management is an
evolving discipline, and conditions will change. Some of the drivers for change include network
security, authentication, and data integrity. Technology changes factor into all of these issues.
Because the network communication environment is complex and ever-changing, we have tried to
provide the basic information needed for connection of the XDS instrument. 95% of users will have
no connection problems, if these instructions are followed.
In the rest of the cases, there may be network issues, corporate restrictions, or other issues which
inhibit easy connection. The troubleshooting section covers some of the most common problems.
In all cases, we recommend minimal tampering with computer settings. This can cause instability, and
may be prohibited by company policies.
At this time, we recommend Microsoft Windows® XP as the easiest operating system by which to
establish network communication. We strongly recommend that Windows 95, 98, and NT 4.0 be
avoided, as they require considerable expertise in network configuration.
3.4.3 Quick Glossary of Terms:
DHCP:
The Dynamic Host Configuration Protocol (DHCP) is an Internet protocol for automating the
configuration of computers that use TCP/IP.
DNS Server:
A Domain Name Server. DNS Servers run special-purpose software, as part of the Domain Name
System, for managing enterprise networks.
IP:
An Internet Protocol (IP) address is a numerical identification and logical address that is assigned to
devices participating in a computer network utilizing the Internet Protocol for communication
between its nodes.
IPv4:
IPv4 refers to “Internet Protocol version 4” which is the fourth revision in the development of the
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