Sharp ER-A440 Service Manual page 19

2. Connection between the terminal and
MODEM
25PIN D-SUB
MODEM
SD 2
3
RD
RTS
4
DCD 8
DTR 20
DSR
6
CTS
5
SG
7
CI 22
FG 1
SD : TRANSMITTED DATA
RD : RECEIVED DATA
DTR : DATA TERMINAL READY
DSR : DATA SET READY
RTS : REQUEST TO SEND
DCD: DATA CARRIER DETECTOR
CTS : CLEAR TO SEND
CI : CALLING INDICATOR
FG : FRAME GROUND
9PIN D-SUB
TERMINAL
3 SD
2
RD
RTS
7
1 DCD
4 DTR
DSR
6
CTS
8
SG
5
9 CI
FRAME GROUND is connected
to the shield of the cable.
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