Ethernet Link And Activity; Signal Quality Bars Explained - Digi IX30 User Manual

Digi IX30 hardware reference

Ethernet Link and Activity

The LEDs on the WAN/ETH1 and ETH2 ports indicate that the Ethernet network interface is up and
there is activity on the network interface.
Left LED (at the bottom of the port connector)
Off: No Ethernet link detected.
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Solid green: Ethernet link detected.
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Blinking green: Indicates Ethernet traffic.
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Right LED (at the bottom of the port connector)
Off: No Ethernet link detected.
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Solid amber: 10/100 Mbps link detected.
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Signal quality bars explained

The signal status bars for the Digi IX30 measure more than simply signal strength. The value reported
by the signal bars is calculated using an algorithm that takes into consideration the Reference Signals
Received Power (RSRP), the Signal-to-noise ratio (SNR), and the Received Signal Strength Indication
(RSSI) to provide an accurate indicator of the quality of the signal that the device is receiving.
For 3G networks (including HSPA+) and 2G networks, the signal strength bars are determined by the
RSSI value.
4G LTE algorithms
For 4G LTE, the IX30 device determines the RSRP, SNR, and RSSI values separately and uses the
following algorithms to display the signal quality:
RSRP > -85, rsrp_bars=5
-95 < RSRP <= -85, rsrp_bars=4
-105 < RSRP <= -95, rsrp_bars=3
-115 < RSRP <= -105, rsrp_bars=2
-199 < RSRP <= -115, if we're connected to the cellular network, rsrp_bars=1,
if not rsrp_bars=0
If RSRP <= -199, the device uses the RSSI as the value with the same algorithm:
SNR >= 13, snr_bars=5
4.5 <= SNR < 13, snr_bars=4
1 <= SNR < 4, snr_bars=3
-3 < SNR < 1, snr_bars=2
-99 < SNR <= -3, if we're connected to the cellular network, snr_bars=1, if not
snr_bars=0
Once the snr_bars and rsrp_bars values are determined, the device uses the lesser of the two as the
reported signal a bars.
3G algorithm
For 3G, the IX30 determines RSSI signal strength:
IX30 User Guide
IX30 LEDs
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