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 |