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Cinterion PH8 GSM Mobile Broadband Module Not Responding the AT Command

Question asked by Public Account on Jun 13, 2014

I am currently porting Cinterion PH8 GSM Mobile Broadband Module on SabreSD Linux Kernel 3.0.35 Ubuntu 11.10。

 

I made the follow changes to Kernel Configs:

 

+CONFIG_MD=y

+CONFIG_PPP=y

+CONFIG_PPP_MULTILINK=y

+CONFIG_PPP_FILTER=y

+CONFIG_PPP_ASYNC=y

+CONFIG_PPP_SYNC_TTY=y

+CONFIG_PPP_DEFLATE=y

+CONFIG_PPP_BSDCOMP=y

+CONFIG_PPP_MPPE=y

+CONFIG_PPPOE=y

+CONFIG_USB_SERIAL=y

+CONFIG_USB_SERIAL_GENERIC=y

+CONFIG_USB_SERIAL_OPTION=y

-CONFIG_CRC_CCITT=m

 

and then found the device node at /dev/ttyUSB0 ~ 4.

 

But after echo AT command to /dev/ttyUSB3: "echo -ne "AT+COPS?" > /dev/ttyUSB3", I did not see any response except "AT+COPS?".

 

I used command "lsusb" to check the device info, but I can only see the VID and PID without any information of it.

 

What else can I do now?

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