Nokia 30 GSM 사용자 설명서

Copyright ©2002 Nokia. All rights reserved.

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1. Check that the data cable is firmly connected to the terminal and to the compatible PC or other 

compatible device.

2. Check that the power supply is firmly connected to the terminal and to an AC wall outlet.

3. Disconnect the power supply from the AC wall outlet before you check that the SIM card is installed 

properly.

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If there are problems with reception, for example interruptions in the service, the signal may be too 
weak. Check the signal strength with the following AT command for example in the HyperTerminal 
connection window: at+csq.

The response is +csq: <rssi>, 99. The parameters for <rssi> are from 0 through 31 at 2 dBm intervals:

0 ... 6

-101 dBm or less -> Unacceptable coverage

7 ... 11

-100 dBm ... -91 dBm -> Weak coverage

12 ... 16

-90 dBm ... -81 dBm -> Moderate coverage

17 ... 31

-80 dBm or greater -> Good coverage

99

Not known or not detectable