Product specifications

Appendix
100
A.2 Troubleshooting Guide
No. Symptom Probable Cause Corrective Actions
1 VT-100 can not login
￭Serial cable connection invalid.
￭Baud Rate set incorrect or COM
port selected incorrectly
￭Input wrong account or password
￭Check cable link.
￭Check Baud Rate and COM port
￭Check account and password
2 The equipment screen
alarm indicators are
different from physical
indicators or network
hang
￭Check related configuration and
physical connectors
User can confirm tributary slot
parameters configuration and trunk
Ethernet parameters configuration
item by item :
￭Check service mode
￭Ethernet port contact
￭Change the Ethernet cable
￭Check the duplex matching
3 Ethernet transmit has
serious data package
loss
The RJ-45 connector has a bad
contact
FULL/HALF duplex is not matching
Trunk Ethernet port service off
￭Check the duplex matching
￭Check Auto-neg mode
￭Check Data forwarding mode
￭Check Trunk Ethernet port all
configuration function
4 Ping fail or can't
transfer data or cannot
remote Telnet
￭Trunk Ethernet port service off
￭Fiber fail
￭The RJ-45 connector has a bad
contact
￭Networking service management
telnet function turned off
￭Trunk Ethernet general parameters
setting error
￭Check the duplex matching
￭Check Trunk Ethernet port all
configuration function
￭Check the fiber contact
￭Change optical cable
￭Check networking service
management function, diagnostic ＆
loopback test item :
(service mode must be on)
￭Execute Autolbk to check optical
connection
5 The unit is reset or
powered off, all the
configuration settings
are lost
￭ The user selected wrong save
configuration or select incorrect
profile load.
￭This equipment will reboot
according your last saved state by
loading the profile.
￭ If your last boot was loading factory
default value, when you restart unit, it
will still load factory default .