The mobile router's cellular WAN disconnects and cannot reconnect automatically

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Zyxel_JoyLee
Zyxel_JoyLee Posts: 68  Zyxel Employee
Friend Collector
edited June 24 in Nebula Mobile Router

For initial troubleshooting, please try the following steps:

  1. go to Network Setting > Broadband > Cellular WAN to enable the network monitoring feature.
    This will help detect connection stability issues. monitor.png

2. Check 5G Band Support:
a. Verify with your ISP which 5G bands are supported in your area. Then,

adjustthe Cellular Band setting on your router from Auto to Manual, selecting

the specific band for improved stability.
b. Alternatively Check local 5G signal via nperf website

(https://www.nperf.com/en/map/AT/-/-/signal?

ll=47.71671679243703&lg=13.35000000000001&zoom=7)

Select the appropriate Country,City/ province,District and Carrier(Operator).

3. Check Cellular band signal quality

Metric

Value Range

Signal Level

Interpretation

RSRP

> -80 dBm

★★★★★ Excellent

Very strong signal; ideal for LTE connection

-80 to -90 dBm

★★★★☆ Good

Stable signal; good performance

-90 to -100 dBm

★★☆☆☆ Fair to Weak

Usable but may affect speed or stability

< -100 dBm

★☆☆☆☆ Poor

Very weak signal; likely unstable or dropped connection

RSRQ

> -10 dB

★★★★☆ Good

Low interference; good signal quality

-10 to -13 dB

★★☆☆☆ Average

Acceptable but affected by interference/load

-13 to -15 dB

★☆☆☆☆ Poor

High interference; degraded performance

< -15 dB

☆☆☆☆☆ Very Poor

Severe interference; high latency, dropped sessions

SINR

> 20 dB

★★★★★ Excellent

Excellent signal-to-noise ratio

13 to 20 dB

★★★★☆ Good

Good throughput expected

0 to 13 dB

★★☆☆☆ Average to Poor

Noticeable performance drop

< 0 dB

☆☆☆☆☆ Very Poor

Signal buried in noise; very poor data performance

RSSI

> -60 dBm

★★★★★ Excellent

Strong total signal power

-60 to -75 dBm

★★★★☆ Good

Acceptable signal strength

-75 to -85 dBm

★★☆☆☆ Weak

Often indicates distance or indoor blockage

< -85 dBm

★☆☆☆☆ Poor

Very weak; may result in disconnection

If the signal quality is too poor, it indicates that your device is located at the edge of the coverage area. It is recommended to improve the device placement or consider installing an external antenna.