TrueTime IRIG NTS-100, Руководство пользователя

Страница: 60 / 75

1/20/97
N N T T S S - - 2 2 0 0 1 1 . . M M A A N N 7 7 - - 1 1 1 1 R R e e v v . . A A
7.7.2 The -c command line switch specifies the community name and the -h switch specifies
the IP address of the SNMP host agent. Note: the invocation of SNMP will vary from one
operating system to the next, but this will give you the idea. Please note: the Enterprise
OID addresses; these represent the input and output string buffers in TrueTime's
Enterprise MIB and are formally defined below. The first SNMP set command places the
function string into the timeserver's command buffer and the following SNMP get
command reads the result of the set command. It is important to note that any TrueTime
function string parameter can be issued using this method. Also note: that only one
function string set may be issued at a time. Do not issue another until the response
string is set to something other than an null string. Remember it takes time to process
these commands and operating the commands in this fashion ensures that they perform
without undesirable effects. Thus, the entire timeserver setup can be done with SNMP.
If these commands are issued from a script or batch file, the setup procedure for an
entire timeserver is repeatable and automatic. Another advantage of this facility is that
the TrueTime Service Department can now help to check the configuration of a
timeserver if it is connected to the Internet. As a security precaution, the timeserver can
turn on/off the remote configuration feature only through the keypad.
ntpControlInput OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
7.7.3 This variable emulates TrueTime's serial function command strings. The same
commands issued to the serial port can be sent to this string. Use this variable for
SNMP sets of functions strings. Note, setting this variable clears ntpControlOutput to the
null string. See ntpControlOutput below.
::= { trapMsg 1 }
ntpControlOutput OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-only
STATUS mandatory
7.7.4 This variable emulates TrueTime's serial function command strings. The same
commands issued to the serial port can be sent to this string. This variable holds the
output result string from the last setting of the above ntpControlInput variable. Use this
variable for SNMP gets of function strings. See ntpControlInput above.
::= { trapMsg 2 }
7.8 GPS GROUP VARIABLES
7.8.1 The GPS group is present in all TrueTime network products. However, only products
synchronized by GPS will have meaningful data in this group. This group reports on the
number of satellites that are currently tracked, the current GPS tracking mode, the
strongest signal strength of the tracked satellites in Trimble units, elevation of the GPS
antenna in centimeters and the longitude and latitude of the GPS antenna in normalized
binary units that can be easily converted to radians or degrees. GPS is a satellite base