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System Clocking Configuration window 81
Models 2616RC, 3096RC & 3196RC Admin Reference Guide 6 • System Clocking
• wan-15(15)—use WAN port #15 for the clock source
• wan-16(16)—use WAN port #16 for the clock source
• internal(200)—use the internal free-running oscillator for the clock source.
Clocking Status (sysdaxClockFailure)
The Clocking Status parameter indicates which, if any, clocking source has failed. The T-DAC considers a
clocking source failed when:
• The T-DAC can no longer detect a pulse
• The T-DAC detects an incorrect number of clock pulses per frame.
The value of Clocking Status may be one of the following:
• no-failures(0)—The T-DAC has detected no failure in the clocking subsystem
• main-ref-fail(1)—The T-DAC’s primary clocking reference has failed
• fallback-ref-fail(2)—The T-DAC’s fallback clocking reference has failed
• master-system-clock-fail(4)—The clock signal provided by the blade in the cPCI chassis with its clocking
mode defined as Master has failed.
• secondary-system-clock-fail(8)—The clock signal provided by the blade in the cPCI chassis with its clock-
ing mode defined as Secondary has failed.
Fallback Indication (daxFallbackInd)
The Fallback Indication parameter indicates whether the T-DAC has switched to its defined secondary refer-
ence as its clocking source. The value of Fallback Indication may be one of the following:
• noError(0)
• fallbackActive(1)
Clock Status
The Clock Status field indicates alarm conditions relating to the T-DAC’s clocking subsystem. If there are no
alarms, the Clock Status field will indicate No Alarm (see figure 26 on page 77). If an alarm condition exists, an
Alarms Present message will be displayed along with one or more of the following failure descriptions as war-
ranted by the situation (see figure 29):
Figure 29. Clock Status: Alarms Present indication
• Main Local Reference Fail—The T-DAC primary clocking reference has failed
• Fallback Local Reference Fail—The T-DAC’s fallback clocking reference has failed
• Master System Fail—The clock signal provided by the blade in the cPCI chassis with its clocking mode
defined as Master has failed.