Problems Concerning The Network And Appropriate Countermeasures (When Communications Are Unstable) - Sharp JW-20FL5 User Manual

[2] Problems concerning the network and appropriate countermeasures (when
communications are unstable)
Symptom Check points
Communication
route
Unable to
communicate,
or unstable
communication
Participating
stations
equipment
settings
Check details
Make sure the external conductive
shields of all the coaxial cables are
connected to ground at one point
Are the shield wires of the AUI
cables properly connected to
ground?
Does each station respond properly
to a Ping command?
Is the collision lamp lit frequently?
Are repeaters used in less than 4
layers
Is each segment within the
maximum length?
Are termination resistors installed at
both ends?
Is the number of devices connected
in each segment within the specified
range?
Are 3 or fewer segments used to
connect the equipment?
Is power to the repeaters turned on?
Are the IP addresses for the network
set properly?
Are the station numbers of the
equipment set properly?
Are the equipment parameters set
properly?
Are the CD (carrier detection)
indicators lit consecutively or
intermittently?
Are the SD (send) indicators lit
consecutively or intermittently?
Are the LK (link) indicators lit
consecutively?
13-3
Chapter 13: Troubleshooting
Countermeasures
Ground properly, according
to section 15-6.
Ground according to the
manufacturer's instruction
manuals
Check the power and
cables of any station that
doesn't respond properly.
Check the contacts in
cables and connectors.
Check for abnormalities
using an analyzer.
Review the configuration
according to section 15-6.
Check the power supply
and power cable, as well
as the voltage.
Check the IP addresses
and support tools using an
analyzer.
Check the IP addresses
and support tools using an
analyzer.
Check the equipment
parameters using support
tools.
Check the communication
cables, and the AUI power
supply.
Re-check the equipment
settings.
Re-check the equipment
parameter settings
13