Sharp ER-A470

CHAPTER 6. CONTROL SIGNAL SEQUENCE
1. Online transmission
1) Half duplex transmission 2) Full duplex transmission
*Note: In the direct connect mode, same as full duplex control, but
the CI signal is not controlled.
3) Line connection sequence flow
DATASD
DTEDCE
DATARD
RTS
CTS
DSR
DCD
DTR
CI
< 100ms
< 500ms
DATASD
DTEDCE
DATARD
RTS
CTS
DSR
DCD
DTR
CI
< 100ms
< 500ms
*
STARTED BY P.C
INITIAL
CI SENSE ?
CI ON ?
DTR ON
DSR ON ?
FULL DUPLEX ?
RTS ON
LINE ESTABLISHED
NO
NO
NO
NO
NO NO
YES YES
CI SENSE ? TIME OUT ?
YES
YES
YES
Note : The CI signal can be changed over when
so set in the PGM mode, and effective
at ECR side.
30sec
ERROR : NO LINE
DTR OFF
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