Model 9289
Spectracom Corporation
NetClock/NTP Network Time Provider Instruction Manual
7-14
Calibrate Settings
Calibrate Now:
Calibrate now is based on the current settings. This will calculate the call latency and adjust all
future calls based on this value. The call latency is based primarily on the phone system.
Therefore, this should be done when the unit is first set up and does not need to be done again
unless it is connected to a different phone system.
Reset Latency Value:
This resets the latency value to the factory default. This can be done if the unit was accidentally
set.
Latency Value/Manually Set Latency:
This box displays the current latency value. If the “manually set latency” box is checked then
this can be edited to set the current latency.
Number of Calibration calls:
This is the number of calibration calls to be made before the modem is declared as calibrated.
The accuracy of the latency calculation depends directly on this number. The more calls that
are made, the more accurate the calculation will be. This should not be lowered from the
default, but it may be safely raised.
Calibration Call Interval:
This is the interval between calibration calls. This value, along with the number of calibration
calls, will determine how long the calibration process will take.
7.1.7 Modem
Testing
The modem can be tested using the Web UI through the Modem Test screen (Figure 7-10).
Test Now:
Tests the modem to make sure it can correctly dial-out. This may only be done while in time
synchronization from another source such as GPS. To test in other states, use the dial now
button. The result of this test will be written to the log file.
Test On Interval:
Enables the modem test interval. If the unit has not made another type of call during this
interval then a test call will be made.
Test Interval:
Sets the modem test interval. In order to set these values, the “Test On Interval” box must be
checked. If the interval expires before another type of call is made then a modem test call will
be made. To schedule a call when not in sync from another time source, use the “Call Interval”
setting in the Dialout Settings page.
Summary of Contents for 9289
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