RCS20 M:N Redundancy Switch
Maintenance
TM056 - Rev. 2.3
6-3
Table 6-2. Major Alarm Matrix
6.2.2 Minor Alarms
Minor Alarms indicate a failure condition that does not immediately result in loss of service on one
or more primary satellite channels. However, a minor alarm may indicate that there is a loss of
redundancy protection for one or more channels. The RCS20 indicates a Minor Alarm by
illuminating the MINOR ALARM LED on the front panel, and closing a relay on the rear panel
ALARM connector. All conditions resulting in an RCS20 Minor Alarm are described in Table 6-3
and a Minor Alarm matrix is shown in Table 6-4. The alarm matrix shows all possible alarm
conditions, and any actions taken by the RCS20 in response to the alarm.
Table 6-3. RCS20 Minor Alarms
PS 1 PRESENT
The slide in power supply module in position PS1 is missing or not
fully-seated.
PS 1 VOLTAGE
The slide in power supply module in position PS1 is supplying the
incorrect voltage.
PS 2 PRESENT
The slide in power supply module in position PS1 is missing or not
fully seated.
PS 2 VOLTAGE
The slide in power supply module in position PS1 is supplying the
incorrect voltage.
COMMUNICATIONS
One or more of the modems connected to the RCS20 have stopped
responding to remote communications from the switch.
FAULTED PRIME
One or more of the modems connected to the RCS20 that are
designated as prime channels have failed.
FAULTED BACKUP
One or more of the modems connected to the RCS20 that are
designated as backup channels have failed.
CONFIGURATION CHANGE
One or more of the modems connected to the RCS20 that are
designated as prime channels have modem configurations that
have changed while the RCS20 is in automatic switch mode.
CDM CLOCK SLIP
One or more of the clock outputs on a Clock Distribution Module
have lost lock with the external reference.
Содержание RCS20
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Страница 62: ...Electrical Interfaces RCS20 M N Redundancy Switch 5 4 TM056 Rev 2 3 Figure 5 4 DDS20 Front and Rear Panels...
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