Once the EC/IO is above ~ -7.0 dB, your connection is going to suffer. In a perfect world, where there is no true interference, the interference level is equal to the noise level resulting in an EC/IO = 0 dB. The EC/IO is a measure of the quality/cleanliness of the signal from the tower to the modem and indicates the signal-tonoise ratio (the ratio of the received/good energy to the interference/bad energy). When this value gets close to 0, performance will drop drastically Reliable data speeds may be attained, but marginal data with drop-outs is possible. When this value gets close to -20, performance will drop drastically When this value gets close to -100, performance will drop drastically There is a point at which trying to obtain more signal delivers diminishing returns, because the quality of the connection is defined by more values than just RSSI (you will find more information on the other measurements in the Mobile Signal Strength Recommendations page).ĢG and 3G signal levels Excellent ( >= -70 dBm)įair but useful, fast and reliable data speeds may be attained, but marginal data with drop-outs is possible The closer to 0 dBm, the stronger the signal. However, -70 dBm and higher values usually equate to the modem being in an excellent coverage area. The exact numbers vary between cellular carriers. The higher the number, the better the signal. This value relates to the signal strength of the cellular signal from the tower to the modem.
The RSSI of the modem is indicated by a negative dBm value. In telecommunications, Received Signal Strength Indicator (RSSI) is a measurement of the power present in a received radio signal.
RSSI (Received Signal Strength Indicatior) - 단위 dBm (절대크기)
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