Comtech EF Data CRS-300 - Manual (Page 210)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Front Panel Operation Revision 19
6–16
6.2.4.2 MONITOR: SW-ALARM
The following are examples of possible Switch status displays, along with suggestions to assist
you in diagnosing the reason for the fault.
SWITCH ALARM: NONE
There are no faults. The “Unit Status” front panel LED should be GREEN.
SWITCH ALARM: -12V PS-B

IS UNDERVOLTAGE
There is a fault. Power supply “B” is under voltage. The “Unit Status” front panel LED will be
RED.
Suggestions:
• Ensure power supply power cord is connected and the power switch is ON.
• Replace defective power supply module.
If the second power supply module is not needed, you can mask this Alarm.
SWITCH ALARM: RM TIMEOUT
RM I/O TIMEOUT
There is a fault. Communication has been lost to the Redundant Modem. The “Unit Status”
front panel LED will be RED.
Suggestions:
• Check cable connections – see Chapter 4. CABLES AND CONNECTIONS.
• Check modem configurations – see Chapter 5. MODEM, RMI/TMI, AND SWITCH
CONFIGURATION.
SWITCH ALARM: RM TIMEOUT
MGC refused, code:12 TFT
There is a fault. COMMs are good to the Redundant Modem, but the configuration of the
bridged Traffic Modem cannot be configured into the Redundant Modem. The “Unit Status”
front panel LED will be RED.
Suggestion: Ensure the most capable modem – with regard to FAST options, installed options,
e.g. Turbo card, firmware version, and hardware revision – is used as the Redundant Modem.