Using a PC Terminal Emulator to Solve Problems 129
Abnormal Indications
from Traffic Counts
Tab l e 19 provides a quick reference to problem identification by using
frame counts:
Error Messages There are two types of error messages that appear on the management
terminal screen:
■Advisory
The only error message of this type is Wrong enter! It appears when
the user enters the wrong response to a menu. The user solves the
problem by re-entering his response.
When a user disconnects the management terminal from an LMI port and
later reconnects to the same port, the LMI menu system stays in the same
state and expects the same user input after reconnect. During reconnect
the user may press the wrong sequence of keys and cause Wrong enter!
to be displayed on the screen. Press the ENTER key a few times until a
menu appears.
■Fatal
Almost all error messages that do appear are fatal. Contact Technical
Support when an error message, except for Wrong enter!, appears. The
most common fatal error messages are listed in Tabl e 20 .
Table19 Summary of Problems Indicated by Counts of Errored Frames
Problem Solution
Errored frame count of one of the following
Ethernet traffic counters differs from zero:
CRC error, Overrun, Alignment error, Frame
too long, or Frame too short.
Use an alternative VCN AC port or
replace the RJ-45 cable, or replace
the Ethernet switch. (in this order)
Errored frame count of one of the following
HDLC traffic counters differs from zero:
Retransmission, Tx error, Overrun, Not mine,
or DPLL error. Or errored frame count of the
following HDLC traffic counters are frequently
incremented: Abort sequence, Nonaligned,
CRC error, Frame too long.
Use an alternative VCN AC port or
replace the VCN AC unit.
Table20 Fatal Error Messages
Error message Significance User Action
FATAL ERROR: SDRAM test
failed!
Hardware error during
boot-up
Contact Technical Support.
FATAL ERROR: failed FLASH
access!
Hardware error during
boot-up
Contact Technical Support.