6. Troubleshooting

First things to check

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

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

3Check that the antenna is firmly connected to the terminal.

4Disconnect the power supply from the AC wall outlet before you check that the SIM card is installed properly.

Reception is poor

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

The response is +csq: <rssi>, 99. The parameters for <rssi> are:

0-113 dBm or less, poor coverage

1-111 dBm, medium coverage

2...30

-109... -53 dBm at 2 dBm intervals, good coverage

31

-51 dBm or greater, excellent coverage

99

not known or not detectable

Troubleshooting

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