Casio IT-2000W - Manual (Page 61)

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3.10 YMODEM Utility
Function
Used to achieve a file transfer via the COM cable.
Communication can be established either between an AT-compatible machine (PC) and an
IT-2000 (main unit), referred to as "PC-to-HT communication". A dedicated 9-pin DSUB-8-pin
cross-type cable (DT-9689AX) is required to connect both the terminals. This utility does not have
functions to allow communication between HT and HT. Use the FLINK function for the HT-to-HT
communication.
Fig. 3.9
Fig. 3.10 Fig. 3.11