Robustel M1000 User Guide - Manual (Page 45)

Robustel GoRugged M1000 User Guide
RT_UG_M1000 _v.2.0.0
20.12.2013 44 / 83
Confidential
Center unless it the modem cannot read it from the SIM Card.
2. Click “Read” to refresh the “Network” and “Rx Level” status.
Values of received signal strength (RSSI)
Value of received signal strength indication (RSSI)
Interpretation of the received signal strength
0 to 12 Insufficient or weak
13 to 19 Average
20 to 31 Good
99 No signal
Note: RSSI should remain higher than 12 to create/accept GSM CSD data calls or establish a GPRS connection. Users
can only transmit/receive by SMS (short message) if the RSSI is less than or equal to 11.
A better way of verifying the RSSI signal (instead of using the Modem Configuration) is to check the “SIGNAL” LEDs on
the front panel directly. See
2.2 LED Indicators for more information.
Antenna selection guide
Value of received signal strength indication (RSSI)
Antenna selection
0 or 1 GSM/GPRS is not good solution in the area
1 Select antenna gain > 10 dBi
12 Select antenna gain > 3 to 5 dBi
≥21 Select antenna gain > 0 to 3 dBi
3.2.17 Init. String
User could enter the initial string in the text input box.
The preset Init. String will take effect under “Normal Mode”.
Note: Maximum 39 characters for each initial string.