Specifications

Chapter 5 Troubleshooting and Diagnostics Installation and Operation Manual
5-12 Troubleshooting ASMi-52CD Ver. 1.0
5.5 Troubleshooting
Using LEDs
You may locate and correct some failures by using the front panel LEDs
(see
Table 5-6). Table 5-7 lists the alarm buffer messages, seen on the ASCII
terminal or the RADview SNMP management tool.
Table 5-6. Using LEDs for Troubleshooting
Symptom Possible Failure Corrective Action
POWER LED is OFF Blown fuses Replace fuses
SYNC is red (modem is not
locked)
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 5-7
Using the Alarm Buffer
 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 5-7. Using Alarm Buffer for Troubleshooting
Symptom Possible Failure Corrective Action
ALM LED is ON and SYNC LOSS
A/B 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
line quality is poor
Replace unit or contact RAD
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-52CD module