Chapter 4 – Troubleshooting and Frequently Asked Questions
When I try to make a data call using ‘ATD<number>’, I get a NO CARRIER response.
•Check ‘AT+CEER’ for NO CARRIER reason and look it up in Reference Guide.
•Check the number that you are dialing.
•Make sure you have CSD service.
•Check registration and signal to make sure modem is registered and getting good signal: +CREG, +CSQ.
•Make sure you went through the activation procedures correctly.
How do I make a CSD
•Create a
•You must have CSD service.
Does this modem support
•No, our CDMA modems do not support HSCSD.
The modem will not answer.
•Set the modem to autoanswer with ‘ATS0=1’ and ‘AT&W’ to store the setting.
•Send ‘ATA’ to the modem once the RING is indicated on the terminal screen.
•You may need to set the modem to ignore DTR, ‘AT&D0’, if your system doesn’t provide DTR.
The modem answers, but does nothing.
•Modem is answering in voice mode.
•Voice: Need a voice cable; such as our “Y” cable.
•Data: Make sure you set ‘AT+CICB=0’ to make the modem answer in data mode.
How does faxing work?
•The CDMA modems only support Class 2.0 Group 3 faxing.
•Need fax services setup on the account.
•Need fax software that supports the modem; e.g., WinFax Pro v10.0.
•Need to set ‘AT+CICB=1’ for modem to answer in fax mode.
When I set the S0 command, store it with &W; then send “ATZ” to the modem, the command goes back to the default of 0?
•This is a bug in the modem. S0 will store just fine, as long as “ATZ” doesn’t get sent to the modem.
After I set the E and &D commands followed by &W, it looks to be stored okay, but as soon as I recycle power on the unit the E and &D commands get set back to default of E1 and &D2.
•This is a bug in the modem. These commands will not store correctly. If modems are powered back up and an “ATZ” is sent to the modem, then &D and E will load to your stored settings correctly.
•Firmware versions 210 and above fixes the storage or the E command.
After I set the Q, V, and &S commands followed by &W, if I recycle power or send ATZ to the modem the settings will get set back to default.
•Bug in the modem. These commands will not store.
What is the max supported serial baud rate?
•230,400 bps is the max.
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