TFTP не помогло, Discovery тоже.
tftp> put firmware_ac.bin
sent WRQ <file=firmware_ac.bin, mode=octet>
sent WRQ <file=firmware_ac.bin, mode=octet>
sent WRQ <file=firmware_ac.bin, mode=octet>
sent WRQ <file=firmware_ac.bin, mode=octet>
sent WRQ <file=firmware_ac.bin, mode=octet>
Transfer timed out.