Verify module signal strength and quality

If your module appears to be connecting to the network but you are unable to reach it, check the signal strength and quality.

  1. Connect a USB cable between your module and computer.

  2. Open a web browser and go to: http://cell.linktodevice.com.

    TIP:    If the link doesn't work, browse to 192.168.86.1.

  3. Under the Status tab check the values in the Signal Strength and Signal Quality fields. Compare these values to the following tables.

CELL200 series signal strength

Signal Strength

RSSI (3G)

RSRP (4G)

Excellent

–70 dBm or greater

–90 dBm or greater

Good

–70 dBm to –85 dBm

–90 dBm to –105 dBm

Fair

–86 dBm to –100 dBm

-106 dBm to –115 dBm

Poor

< –100 dBm

< –115 dBm

 

CELL200 series signal quality

Signal Quality

ECIO (3G)

RSRQ (4G)

Excellent

0 to -6

> -9

Good

-7 to -10

-9 to -12

Fair to Poor

-11 to -20

-13 or less
NOTE:

These tables can also be viewed in the module web interface by clicking the blue question mark next to the Signal Strength and Signal Quality fields. Signal strength values within the Poor range cannot be relied upon to provide stable connections.

If the Signal Strength and/or Signal Quality is Poor, you may have to redirect or relocate the cellular module antenna to a place with a better cellular signal. Upgrading the antenna or adding a diversity antenna can offer better performance.

TIP: Cellular phone apps, like OpenSignal (https://opensignal.com/ ), can help determine the best direction to point an antenna for optimal signal strength.