Welcome
Initial setup
Digi 5400-RM Cellular Remote Manager User Guide
10
4G LTE algorithm
Determine RSRP, SNR, and RSSI values separately, using the following
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, then use RSSI as the value and run it through the same algorithm described above.
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 are determined, use the lesser of the two. That is the reported
signal strength bars.
3G algorithm
Determine RSSI signal strength.
RSSI > -80, bars=5
-90 < RSSI <= -80, bars=4
-100 < RSSI <= -90, bars=3
-106 < RSSI <= -100, bars=2
RSSI <= -106, if we're connected to the cellular network, bars=1, if not bars=0
bars is then reported as the signal strength bars.
2G algorithm
Determine RSSI signal strength.
RSSI > -80, bars=5
-89 < RSSI <= -80, bars=4
-98 < RSSI <= -89, bars=3
-104 < RSSI <= -98, bars=2
RSSI <= -104, if we're connected to the cellular network, bars=1, if not bars=0
bars is then reported as the signal strength bars.
Initial setup
1. Insert your activated SIM card provided by your cellular network operator. The metal contacts
should be facing down. You will hear a click once the SIM is completely inserted.
2. For maximum performance, attach both of the included antennas. While gripping the metal
connector section with your thumb and forefinger, tighten until secure. Do not tighten the
antenna by holding any part of the plastic antenna housing.
3. Connect the power supply unit to the device.