User`s guide
Table Of Contents
- Figure 2.1: VMR Series - Front Panel (Model VMR-16HD20-1 Shown)
- Figure 2.2: VMR Series - Back Panel (Model VMR-16HD20-1 Shown)
- Figure 2.3: NPS Series - Front Panel (Model NPS-16HD20-1 Shown)
- Figure 2.4: NPS Series - Back Panel (Model NPS-16HD20-1 Shown)
- Figure 5.1: Boot Priority Example 1
- Figure 5.2: Boot Priority Example 2
- Figure 9.1: The Help Menu (Administrator Mode; Text Interface - VMR Shown)
- Figure 14.1: Web Access Parameters (Text Interface Only)
- Figure B.1: RS232 SetUp Port Interface
- 1. Introduction
- 2. Unit Description
- 3. Getting Started
- 4. Hardware Installation
- 5. Basic Configuration
- 5.1. Communicating with the VMR or NPS Unit
- 5.2. Configuration Menus
- 5.3. Defining System Parameters
- 5.4. User Accounts
- 5.5. Managing User Accounts
- 5.6. The Plug Group Directory
- 5.7. Defining Plug Parameters
- 5.8. Serial Port Configuration
- 5.9. Network Configuration
- 5.10. Save User Selected Parameters
- 6. Reboot Options
- 7. Alarm Configuration
- 8. The Status Screens
- 9. Operation
- 10. SSH Encryption
- 11. Syslog Messages
- 12. SNMP Traps
- 13. Operation via SNMP
- 14. Setting Up SSL Encryption
- 15. Saving and Restoring Configuration Parameters
- 16. Upgrading VMR/NPS Firmware
- 17. Command Reference Guide
- Appendix A. Specifications
- Appendix B. Interface Descriptions
- Appendix C. Customer Service
- Index

5-8
Basic Configuration
• NTPEnable: When enabled, the VMR or NPS will contact an NTP server (defined
via the NTP Address prompts) once a day, and update its clock based on the NTP
server time and selected Time Zone. (Default = Off.)
Notes:
• The VMR/NPS will also contact the NTP server and update the time whenever
you change NTP parameters.
• To cause VMR or NPS to immediately contact the NTP server at any time,
make certain that the NTP feature is enabled and configured, then type /F
and press [Enter]. When the System Parameters menu appears, press
[Esc]. The VMR or NPS will save parameters and then attempt to contact the
server, as specified by currently defined NTP parameters.
• PrimaryNTPAddress: Defines the IP address or domain name (up to 64
characters long) for the primary NTP server. (Default = undefined.)
Note: In order to use domain names for web addresses, DNS parameters must
first be defined as described in Section 5.9.5.
• SecondaryNTPAddress: Defines the IP address or domain name (up to 64
characters long) for the secondary, fallback NTP Server. (Default = undefined.)
Note: In order to use domain names for web addresses, DNS parameters must
be defined as described in Section 5.9.5.
• NTPTimeout: The amount of time in seconds, that will elapse between each
attempt to contact the NTP server. When the initial attempt is unsuccessful, the
VMR/NPS will retry the connection four times. If neither the primary nor secondary
NTP server responds, the VMR/NPS will wait 24 hours before attempting to contact
the NTP server again. (Default = 3 Seconds.)
• TestNTPServers: (Text Interface Only) Allows you to ping the IP addresses or
domain names defined via the Primary and Secondary NTP Address prompts, or to
ping a new address or domain defined via the Test NTP Servers submenu in order
to check that a valid IP address or domain name has been entered.
Note: In order for the Test NTP Servers feature to function, your network and/or
firewall must be configured to allow ping commands.