User manual

NTD Clocks User Manual - Rev 2.2.2 Jan-10
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© Masterclock
®
, Inc
Reset Device
The network clock may be reset with a soft reset to allow the device to clear its current communications
buffer and re-initialize its processing, includes re-requesting of a DHCP address. This feature is
intended to allow the user to remotely reset the unit. This feature does not restore the unit to its factory
default state. Simply right click on the clock you are interested in a select “Reset Device”.
Soft Restarts
A soft restart may periodically be performed by the network clock to automatically attempt to rectify a problem it may be
experiencing. A soft restart is essentially the same as performing a manual soft reset device as described above.
The NTD clock will perform a soft restart under the following conditions:
• If the clock is not receiving an NTP poll response or an NTP broadcast response depending on which mode the NTD
clock is in.
• If the clock is set to use DHCP and no DHCP server can be found.
The timeout before doing a soft restart is no less than every 10 minutes. Several factors can increase the time between these
soft restarts.
• The soft restart will be delayed by two hours if a connection is made by telnet or a discovery by WinDiscovery.
• The soft restart is delayed if the user changes the default parameters for NTP poll retries/timeouts or the NTP
broadcast timeout. For example, if the NTP broadcast timeout is increased to 60 minutes the soft restart timeout will
also be increased to 60 minutes.
Telnet Terminal Configuration
A terminal-style configuration interface is available via Telnet. To connect with the NTD in this manner
use any standard Telnet client application, specifying the IP address of the clock as the server with
which to connect. The factory default port is well-known telnet server port 23.
Configuration via Telnet may not be convenient for devices operating with a factory default
configuration since the IP address is not known. Use the WinDiscovery application or the RS-232
interface to establish first-time networking configuration.
[Helpful Hint: If a DHCP server is available on the network, The DHCP server can be utilized to
provide the IP address of the associated device name that is registered.]
The following sections provide basic descriptions of using the Telnet interface of the network clock.
Please refer to the previous Using WinDiscovery sections for additional details and important
operational information regarding the special features and modes of the network clock.
[Note: for security purposes, the Telnet interface can be disabled. When disabled, you will no longer be
able to access the device with Telnet. To re-enable the Telnet feature, one of the other configuration
methods must be used, or the clock must be reset to factory default configuration. ]
If you are not familiar with the Telnet application, ask your network system administrator for assistance.