iR1200 Modem
www.telusmobility.com 43
TROUBLESHOOTING
This chapter describes typical configuration problems and provides instructions on how to troubleshoot issues with the iR1200
modem.
Common Problems Page 43
Error Messages Page 44
Diagnostic Commands
Extended AT Command
Extended Error Result Codes
Page 45
Page 45
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Common Problems
The following table identifies the most common problems that may occur while setting up and using your modem for data calls.
!
IMPORTANT INFORMATION: Customers cannot ping a Non Routable IP address
when provisioned due to the NAT (Network Address Translator) Server. This server
attaches a Class C Public IP Address to a Private Class A Non Routable IP address
for a specific period of time to browse the public internet. This Class C address is
needed in order to route on the public internet, as Non-Routable IPs are for internal
routing only (Intranet).
Symptom Troubleshooting Tips
The modem does not respond
to AT commands.
Make sure that:
• The modem is powered on.
• The cable is properly connected to the modem.
• The cable is connected to the correct port.
• The correct port is specified in your communication software.
• The modem is set to the same baud rate specified in the communication software.
The NO CARRIER message
displays when the modem
attempts data calls.
Make sure that the S7 register contains a value greater than or equal to 60 by issuing an AT&V
command or by explicitly setting ATS7=’x’ (where x is, enter any number between 1 and 255).
Modem does not auto-answer
incoming data calls (not
default operation).
Make sure that the S0 register contains a value other than 0 (zero) by issuing the AT&V
command. You can also explicitly set ATS0=x from the software’s command mode (where x is
any number between 1 and 255).
Received data is
unrecognizable.
Make sure that the flow control is set to RTS/CTS (hardware flow control is enabled) in the
communication software and is set to &K3.
Data is being intermittently
lost.
Make sure that the flow control is set to RTS/CTS (hardware flow control is enabled) in the
communication software and is set to &K3.
Modem seems to respond
slower than usual.
Check the signal strength icon to be sure the signal is not weak.
Modem keeps dropping
connection.
Check the signal strength and signal quality icon to be sure the signal is not weak or poor.
