Multitech GFU19 User's Guide download pdf (Page 18)

CONFIGURING AND COMMUNICATING WITH YOUR DEVICE

■ Type AT and press Enter.

If the device responds with OK, you are communicating with the device.

Verifying Signal Strength

To verify the device signal strength, enter:

AT+CSQ

The command indicates signal quality, in the form:

+CSQ: <rssi>,<ber>

Where:

<rssi> Received signal strength indication.

0 (-113) dBm or less

1 (-111) dBm

2-30 (-109) dBm - (-53) dBm / 2 dBm per step

31 (-51) dBm or greater

99 Not known or not detectable

<ber> Bit error rate, in percent

0 Less than 0.2%

1 0.2% to 0.4%

2 0.4% to 0.8%

3 0.8% to 1.6%

4 1.6% to 3.2%

5 3.2% to 6.4%

6 6.4% to 12.8%

7 More than 12.8%

99 Not known or not detectable

Note: Signal strength of 10 or higher is needed for successful packet data sessions.

Example

A example response to AT+CSQ:

+CSQ: 15,1

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Multitech GFU19 User's Guide Page 18