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A File data is split into 1024 byte parts, each part wrapped into a DATA command and is sent. <br>

The file is sent in chunks of 1024 bytes, but the server may receive it in various packet sizes depending on a modem and provider packet forming procedures. . <br>

Note: ''if a command with a bad CRC is received, RESUME command should be sent with the last valid file offset, after receiving a RESUME command, the server will stop sending DATA commands and continue communication from'' '''“Resume file transfer”''' ''step.''<br>

Note: ''if a command with a bad CRC is received, RESUME command should be sent with the last valid file offset, after receiving a RESUME command, the server will stop sending DATA commands and continue communication from'' '''“Resume file transfer”''' ''step.''<br>

CRC polynomial expression: 0x8408

CRC polynomial expression: 0x8408