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135BusinessPhone – Cordless DT590
Troubleshooting
Troubleshooting
This section contains information on how to solve common
operational problems.
Go through the following list if you encounter any problems. If this
check list does not solve the problem, contact your system
administrator. If others have similar problems, there may be a
system error.
Fault check list
Fault Probable cause
Action or
comment
No display Battery low or
phone defect
Charge battery
“Connect battery”
is displayed
Battery not
properly fit or
defect
Check battery or
contact system
administrator
No ringing Ringer off icon on
or phone defect
Off icon on: Adjust
volume
Signal strength
icon off
Out of coverage
area, system or
phone defect
Enter coverage
area or contact
system
administrator
Low battery icon
on
Battery capacity
equal to 10%
Charge battery
Low battery icon
flashes
Battery capacity
equal to or lower
than 5%
Charge battery
4 short beeps every
2minutes
Out of coverage
area or not
connected
Enter coverage
area or contact
system
administrator