Comtech EF Data OM20 - Manual (Page 143)

OM20 Universal Outdoor Modem Maintenance and Troubleshooting
MN-OM20– Revision 5 7–5
7.2.1.5 Drop and Insert Alarms
Alarm Possible Cause
Multiframe Lock The insert framer is not in sync.
CRC Lock An Insert CRC Fault occurred. Valid in T1-ESF, PCM-30, or PCM-
30C Modes.
T1 Signaling An Insert T1 Yellow Fault occurred. Valid in T1-ESF, T1D4, or
SCL-96 Modes.
E1 FAS (E1 Frame
Acquisition Sync) An E1 FAS Fault occurred. Valid in PCM-30, or PCM-30C, PCM-
31, or PCM-31C Modes.
E1 MFAS (E1 Multi-
Frame Acquisition Sync) An E1 MFAS Fault occurred. Valid in PCM-30, or PCM-30C,
PCM-31, or PCM-31C Modes.
7.2.1.6 Common Major Alarms
Alarm Possible Cause
TERR FPGA CFG Indicates an Interface Card FPGA configuration failure probably
caused by a missing, or wrong file.
CODEC FPGA CFG Indicates Turbo Codec Card FPGA configuration failure probably
caused by a missing, or wrong file.
+1.5V RX SUPPLY Displays the measured voltage of the 1.5 Volt Rx power bus located
inside the modem.
+1.5V TX SUPPLY Displays the measured voltage of the 1.5 Volt Tx power bus located
inside the modem.
+3.3V SUPPLY Displays the measured voltage of the +3.3 Volt power bus located
inside the modem.
+5V SUPPLY Displays the measured voltage of the +5 Volt power bus located
inside the modem.
+12V SUPPLY
Displays the measured voltage of the +12 Volt power bus
located inside the modem.
+20V SUPPLY
Displays the measured voltage of the +20 Volt power bus
located inside the modem.
7.2.2 Alarm Masks
The OM20 performs a high degree of self-monitoring and fault isolation. The alarms for these
faults are separated into the following three categories:
 Active Alarms
 Common Equipment Alarms
 Backward Alarms