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Inova OnTime Digital Clock Owner's Manual
All claims based on information publicly available at time of printing. All other product or service names mentioned in this document may be
trademarks of the companies with which they are associated.
© 2007 Inova Solutions. | All rights reserved. 6.12.2007 | page 11
Creating a DHCP Configuration String
The following table describes the five options that can be used in a configuration string
when establishing a private DHCP server option for automatically configuring the clock. The
format used is option name=option value, with the options separated by semicolons in the
configuration string. This string is added to the DHCP server, as described in the next
section. (See Table 4 for example configuration strings).
Option
Name
Option
Value
Configuration
Setting
Description
timeserver
SNTP Time
Server name
or IP address
SNTP Time Server
(sntp –h
command)
Sets the SNTP Time server Host Name or IP
address to use for time synchronization. If a Host
Name is used, then the DHCP server must also
provide a DNS server to use to resolve the Host
Name.
timezone
hh:mm time
offset
Timezone offset
(timezone
command)
Sets the number of hours and minutes to offset
from UTC time when displaying time. This can be
negative. The minutes (:mm) are optional.
dst
none, [rule
specification]
Daylight Saving
Time
(dst command)
• none - Disable the Daylight Saving Time
adjustment.
• Other values parsed based on the DST
rule format. See the dst command for
more information, the format is 8
numbers in the order: startDOW startDay
startMonth startTime endDOW endDay
endMonth endTime
24hour true, false, t, f
Clock hours
display mode
(display -t
command)
If true the clock uses 24hour (military) time format
and disables the AM/PM light, otherwise it uses
12hour time format and enables the AM/PM light.
showcolon true, false, t, f
Clock colon
display mode
(display -c
command)
If true the colon separator between the hours and
minutes is lit.
Table 3: DHCP Private Option String Parameters
Table 4 on the next page contains examples of the configuration strings.