User guide

Troubleshooting Guide
No.
Symptom
Probable Cause
Corrective Action
1
VT-100 cannot login
• CIT cable connection invalid.
• Baud Rate incorrect and com port
incorrectly selected.
• Input wrong account and password
• Check cable link
• Check baud rate and com port
• Check login name and password
2
The equipment screen alarm
indicators are different from
physical indicators.
• Alarm configurations incorrectly set.
• Physical alarm connector faulty.
• Check Tributary Slot parameters and
Ethernet parameters configuration screen.
• Check service mode
• Check Ethernet port contacts
• Check Ethernet cable
• Check duplex matching
• Disable unused ports
3
Ethernet has serious packet
loss.
• RJ45 connector is damaged.
• FUUL/HALF duplex does not Trunk
Ethernet port service.
• Check the duplex matching.
• Check the auto-neg mode.
• Check data forwarding mode.
• Check all Trunk Ethernet port configuration
functions.
4
Ping fails, can’t transfer data, or
can’t remote Telnet.
• Trunk Ethernet port service is off.
• fiber cable failure.
• RJ45 connector is damaged.
• Networking service management telnet
function is off.
• Trunk Ethernet general parameters setting
error.
• Check duplex matching.
• Check all Trunk Ethernet port configuration
functions.
• Check the fiber contacts.
• Test and/or change optical cable
• Check networking service management
function and preform loopback test.
• Execute Autoblk to check optical
connection.
5
The unit is reset or powered off,
all the configuration settings are
lost.
• User did not save configuration.
• Incorrect loading profile was selected
during last startup.
• The iMux will startup according to the last
startup profile loaded.
• Select the correct startup profile on
startup.
• If you loaded the factory default profile
during you last startup, the iMux will
default to the factory setting upon restart.
6
The iMux cannot be managed
• Networking service management SNMP
function is turned off.
• Device IP is incorrect.
• SNMP agent configuration read/write
community is incorrect.
• Check networking service management.
• Check device IP.
• Check SNMP agent configuration.
7
Power indicator is off
• Power supply is not available.
• The power supply switch is not turned on.
• the power supply connections are loose or
faulty.
• Change the power supply.
• Turn on the iMux power switch.
• Check all power connections.
116! Troubleshooting