Ericsson F250m, Руководство пользователя

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Troubleshooting
and FCT indicators
This chapter describes the procedures to identify and,
if possible, correct problems that might occur with
the FCT or its installation. Some problems require
that you call your network operator, but most
problems you encounter you can easily correct
yourself.
Light indicators
The FCT has two light indicators: red and green.
The green light indicates the network signal strength,
according to the following table:
Number of green
Network signal strength
light flashes
0 Unacceptable (no networks)
1 - - - Acceptable
2 - - - - - - Good
3 - - - - - - - - - Very good
Steady --------------- Excellent
Note: if you have the DA20 accessory display
(See “Accessories” on page 38), a
“NO NETWORKS” message will show on your
display when no network is available. If another
network to which your SIM card is locked is
available, the message “EMERGENCY ONLY” will
appear instead, indicating that you will be able to
make emergency calls only.
The red light indicates the FCT power supply situation:
Red light Power supply situation
ON----------- FCT power supply is on
Flashing- - - FCT is powered from battery back-up
OFF FCT power is off (FCT switched off)
When both red and green lights are flashing
simultaneously, it means that the FCT is under
alarm conditions. In this situation, ONLY
EMERGENCY CALLS can be made.
Depending on the number of flashes, the table shows
the type of alarms that may be happening.
Note: if you have the DA20 accessory display
(See “Accessories” on page 38), the specific alarm
status message will show on your display.
32 Troubleshooting and FCT indicators