EZR33
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Test Signal Strength

Guidance to check the accurate cellular signal strength information receiving on the 4G router.

Signal Quality

The numerical values of 2G and 3G networks are RSSI standards. The LTE network is the RSRP standard, the Reference Signal receiving power. The closer the number is to zero, the better the reception, so -90dB is a stronger signal than -100 dB. ‌

The signal sensitivity of the 4G mobile modem is -101dBm. To acquire a fast and stable 4G internet connection, the router should receive > -101dBm RSRP LTE signals.

General Signal Info

After accessing the router, go to the front page or Status > Overview. You can find the accurate signal strength information in the Device information section. Refer to the signal test on router. Click the Reacquire button to get the updated signal strength information.

Since setting up the cellular connection is the priority, the Device information will take a few minutes to show completely on the first boot.

Instant Signal Info

When using a directional mobile antenna, you can check the instant signal information to locate the antenna with the best signal reception. The EZR33 router has built-in UQMI and QMICLI commands, which are workable with the QMI-Cellular protocol only.

After inserting a SIM card and the router is powered on, go to the command-line interface and use the below commands to check the instant signal information. Refer to Device information to get the meaning of parameters.

i. UQMI

Command uqmi -d /dev/cdc-wdm0 --get-signal-info

root@OutdoorRouter:~# uqmi -d /dev/cdc-wdm0 --get-signal-info
{
        ""type"": ""lte"",
        ""rssi"": -60,
        ""rsrq"": -14,
        ""rsrp"": -88,
        ""snr"": 122
}

ii. QMICLI

Command qmicli -d /dev/cdc-wdm0 --nas-get-signal-info

root@OutdoorRouter:~# qmicli -d /dev/cdc-wdm0 --nas-get-signal-info
[Date] -Warning ** [/dev/cdc-wdm0] 
[/dev/cdc-wdm0] Successfully got signal info
LTE:
        RSSI: '-55 dBm'
        RSRQ: '-11 dB'
        RSRP: '-89 dBm'
        SNR: '7.8 dB'

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

root@OutdoorRouter:~# qmicli -d /dev/cdc-wdm0 --nas-get-signal-strength
[Date] -Warning ** [/dev/cdc-wdm0] 
[/dev/cdc-wdm0] Successfully got signal strength
Current:
        Network 'lte': '-55 dBm'
RSSI:
        Network 'lte': '-55 dBm'
ECIO:
        Network 'lte': '-2.5 dBm'
IO: '-106 dBm'
SINR (8): '9.0 dB'
RSRQ:
        Network 'lte': '-11 dB'
SNR:
        Network 'lte': '11.4 dB'
RSRP:
        Network 'lte': '-89 dBm'

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