Digi TX40 User Manual page 141

Interfaces
n Poor: -116 dBm to -120 dBm
n No service: < -120 dBm
Signal strength for 3G and 2G connections
For 3Gand 2Gcellular connections, the current RSSI value determines signal strength.
Excellent: > -70 dBm
n
Good: -70 dBm to -85 dBm
n
Fair: -86 dBm to -100 dBm
n
Poor: < -100 dBm to -109 dBm
n
No service: -110 dBm
n
Tips for improving cellular signal strength
If the signal strength LEDs or the signal quality for your device indicate Poor or No service, try the
following things to improve signal strength:
Move the TX40 device to another location.
n
Try connecting a different set of antennas, if available.
n
Purchase a Digi Antenna Extender Kit:
n
Antenna Extender Kit, 1m
l
AT command access
To run AT commands from the TX40 command line:

Command line
1. Select the device in Remote Manager and click Actions > Open Console, or log into the TX40
local command line as a user with full Admin access rights.
Depending on your device configuration, you may be presented with an Access selection
menu. Type admin to access the Admin CLI.
2. At the Admin CLI prompt, type modem at-interactive and press Enter. Type n if you do not
want exclusive access. This allows you to send AT commands to the device while still allowing
the device to connect, disconnect, and/or reconnect to the cellular network.
3. At the Admin CLI prompt, use the
command session:
> modem at-interactive
Do you want exclusive access to the modem?
4. Type n if you do not want exclusive access. This allows you to send AT commands to the
device while still allowing the device to connect, disconnect, and/or reconnect to the cellular
network.
The following is an example interactive AT command:
TX40 User Guide
modem at-interactive command to begin an interactive AT
(y/n) [y]:
Wide Area Networks (WANs)
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