Knowledge Base FAQ Item #7521060

Q7521060: I'm using a GSM modem. The following error comes up: "Error#30351: Unexpected response from modem". In the log file, I see some undisplayable characters received from the modem. What could be the problem?

Most probably, the baud rate causes the problem: COM port and modem are not sending/receiving at the same speed. We strongly recommend to use 9600bps. Two things you need to do:

1. Make sure that your COM port is configured to use 9600bps. To do so, open the Windows Device manager and click on COM1-properties. There you can set it to 9600bps.
2. Set the modem to 9600bps.