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modem_receive_level_diagnostics

How to check the received signal level of a 3G modem

To find out the modem signal reception level, open the Network Setup → Status → System Log page:

In the appeared log you need to find the AT commands and the answer to the CSQ command:

For example: +CSQ: 23,99^M

The first number in this answer (23) is the signal quality.

Value RSSI dBm Quality
2 .. 9 -109 .. -95 Bad
10 ..14 -93 .. - 85 Normal
15 ..19 -83 .. -75 Good
20 .. 30 -73 .. -53 Excellent