Quectel WCDMA UG FTP Series At Command Manual page 42

4
Summary of Error Codes
The error code <err> indicates an error related to mobile equipment or network. The details about <err>
are described in the following table.
Table 1: Summary of Error Codes
<err> Meaning
0 Operate successfully
601 Unknown error
602 FTP service would block
603 FTP service busy
604 DNS parse fails
605 Network error
606 Control connection closed.
607 Data connection closed
608 Socket closed by peer
609 Timeout error
610 Invalid parameter
611 Fail to open file
612 File position invalid
613 File error
614 Service not available, closing control connection
615 Open data connection fails
616 Connection closed; transfer aborted
617 Requested file action not taken
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