User Guide

CTM-110/120 Installation & Operation Manual

Page 21

1702-0037 Rev 3.2

Situation The power LED is flashing slowly and I can’t communicate with the

modem.

Solution: The modem is in low power standby mode. Make sure that the standby

signal is connected to greater than 9VDC AND the RS232 port is active.

Situation: The USB to serial converter isn’t working.

Solution: Make sure that the CTM-110/120 modem has been installed in Windows

to use the same comms. port as that used by the USB to serial converter.

Situation: DUN makes a connection but no Internet applications work.

Solution: Make sure that any firewall clients running on your computer have been

disabled (especially if you use your computer in an office LAN

environment).

Situation: How do I check to see if my modem is registered on the network?

Solution: Use the Chameleon Controller software and from the Tools menu select

Modem Status. This provides the following information:

Current band (PCS or CDMA)

Current channel

SID

NID

Modem temperature in degrees Celsius

Pilot acquired (or not)

Modem registered (or not)

Alternatively, from the Tools menu select Terminal and enter the

command AT!STATUS

Situation: I need to find the ESN of the modem but I can’t access the label on its

base.

Solution: Use the Chameleon Controller software and from the Tools menu select

Modem Status. This will return the modems ESN in an 11 digit decimal

format.

Alternatively, from the Tools menu select Terminal and enter the

command AT+GSN. This will return the modems ESN in an 8 digit

hexadecimal format. Convert this to decimal format by separating the

hex number into two parts prior to performing the conversion:

hh-hhhhhh

Trouble shooting