- Does the serial port be occupied by other serial communication tools when dialing?
- Are the baud rate of module, modem and dial up the same?
- Is the APN configuration right or wrong in the modem?
- Is the device five-wire designed or three-wire designed? Does the device open or close the hardware flow control?
- Is the tested SIM card being PIN locked? Is SIM card in arrearage?
Is there any difference between module and modem?
As for example I am using EC25 mini PCIe, should I call it a module or modem?