Specifications

Chapter 5 Troubleshooting and Diagnostics Installation and Operation Manual
5-8 Troubleshooting ASMi-52CQ Ver. 2.12
5.4 Troubleshooting
Using LEDs
You may locate and correct some failures by using the front panel LEDs (see
Table 5-3). Table 5-4 lists the alarm buffer messages, seen on the ASCII terminal
or the RADview SNMP management tool.
Table 5-3. Using LEDs for Troubleshooting
Symptom Possible Failure Corrective Action
POWER LED is OFF Blown fuses Replace fuses (remove ASMi-52CQ from
the hub)
SYNC is red (modem is not
synchronized)
Line connection
between modems
Check line and line connection between
modems
Modems are synchronized but
DATA LED is OFF (information is not
transferred)
Modem to DTE
connection
Check connection between modem and
DTE
ALM LED is On See Table 5-4
Using the Alarm Buffer
³ To use the alarm buffer for troubleshooting:
1. When the ALM LED is ON, connect the RADview management tool or an ASCII
terminal to view the alarm buffer messages.
2. Enter the Modem Alarm Status screen and watch the alarm states.
ON indicates an active alarm.
Table 5-4. Using Alarm Buffer for Troubleshooting
Symptom Possible Failure Corrective Action
ALM LED is ON and SYNC LOSS
LINE A alarm is stored in the
alarm buffer
Line between modems is
not properly connected
Verify and connect the line properly; verify
the units’ clock type
ALM LED is ON and NO
MANAGEMENT LINK alarm is
stored in the alarm buffer
Line between modems
has exceeded its
maximum range; or the
line quality is poor
Replace unit or contact RAD’s Technical
Support
ALM LED is ON and
SELF TEST FAILED alarm is stored
in the alarm buffer
Hardware failure Replace unit
ALM LED is ON and
NO MODEM PORT alarm is stored
in the alarm buffer
Digital interface is
missing, or digital
interface is not supported
by modem
Mount required digital interface on the
ASMi-52CQ module