IBM 1000-90 ユーザーズマニュアル

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COMM.EXE
This device
cable configured as
cable part #
LI-6200
Male DCE
LI-6000
Male DCE
LI-1000
Female
DCE
1000-09
LAI-2000
Female
DTE
2000-02
LI-3000A
Male
DTE
1800-04
LI-1800 terminal port
Male
DTE
1800-04
LI-1800UW terminal port 
Male
DTE
1800-04
LI-6252 & LI-6262
Male
DTE
1800-04
The cable would then plug directly into the instrument.  If you wish
to build your own, here's how:
9 pin
25 pin DTE
25 pin DCE
1
CD
8
8
2
RD
3
2
3
TD
2
3
4
DTR
20
6
5
GND
7
7
6
DSR
6
20
7
RTS
4
4
8
CTS
5
5
9
RI
22
22
If you use 9-conductor cable, you can connect all 9 pins as shown.
Alternatively, you can use 5 conductor cable, connect only pins 2, 3,
4, 5 and 6 of the 9 pin connector, and jumper some pins on each
connector:
On Connector
Short these pins:
9 pin:
(1,6,8)
25 pin: 
(5,6,8) (4,20)