Signal strength readings: Interpretation

Hi,

We’re sometimes getting confusing signal strength readings from our BG96 modems:

qmicli /dev/cdc-wdm0 --nas-get-signal-strength

output:

[/dev/cdc-wdm0] Successfully got signal strength
Current:
        Network 'lte': '0 dBm'
RSSI:
        Network 'lte': '0 dBm'
ECIO:
        Network 'lte': '-31.5 dBm'
IO: '-106 dBm'
SINR (8): '9.0 dB'
RSRQ:
        Network 'lte': '-3 dB'
SNR:
        Network 'lte': '-4.4 dB'
RSRP:
        Network 'lte': '-140 dBm'

The ‘current’ and ‘RSSI’ numbers look like something went wrong. The ‘RSRQ’ indicates excellent signal strength while the ‘RSRP’ suggests we have no signal at all. This is in an area with good coverage where, a couple of seconds before and after, the command returns reasonable values. How should we interpret these numbers?

To query the quality of BG95/Bg96 , pls use the below at

AT+Qcsq?

+QCSQ: “CAT-M1”,0,-140,116,-3

the below is the benchmark of signal strength under catm and NB mode
image

Hi,

Can the above interpretation also be applied to BG77 andt BC66/BC660?