Multi-Tech Systems RJ-9 Benutzerhandbuch
Chapter 2 – Getting Started
Multi-Tech Systems, Inc. MultiModem Wireless Modem with Ethernet Interface (S000375B)
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Step 6. Using AT Commands to Verify Signal
Strength and Network Registration
Important Note:
Before you can use these commands, you must complete the previous steps in this chapter.
Prerequisite Setup
In order to communicate directly with the internal cellular module with AT commands, you first must disable PPP
by logging into the Web Management software of the router:
by logging into the Web Management software of the router:
1.
From the workstation, open a Web browser.
2.
Type the default Gateway Address: http://192.168.2.1
3. Login
After entering the Address, the Login screen displays.
•
Type the default User name: admin (all lower-case).
•
Type the default password: admin (all lower-case).
Note:
The User name and Password are case-sensitive (both must be typed in lower-case). If
Windows displays the AutoComplete screen, you may want to click No to tell the Windows OS not
to remember the password; this helps maintain PC security.
to remember the password; this helps maintain PC security.
•
Click the Login button. The Web Management Home screen displays.
4.
Select Wizard Setup.
5.
On the Wizard Setup screen under PPP Configuration, disable PPP.
6.
Click the Submit button.
7.
Click Save & Restart.
Open the Command Window
1.
From the workstation, open the command window by clicking the Start button and selecting Run.
2.
Type
CMD to open the command window. Click OK.
3.
When the command window opens, type Telnet 192.168.2.1 5000
Note:
5000 is the port number.
3.
At Login, enter the user name admin.
4.
At Password, enter the password admin.
Once logged in, you can use AT commands to
communicate with the cellular module.
Verify Signal Strength
1.
In the command window, type AT+CSQ
2.
The modem responds with the received signal strength (rssi) and the channel bit error rate (ber).
RSSI ranges from 0 to 31. BER ranges from 0 to 7 (7 is the highest error rate).
RSSI ranges from 0 to 31. BER ranges from 0 to 7 (7 is the highest error rate).
Signal Strength – RSSI
10 - 31
Sufficient
0 - 9
Weak or Insufficient
99 Insufficient
Note:
Sprint models will respond differently. Please refer to the CDMA AT Command Reference Guide.