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LEAD DEFINITIONS E-7
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Table E-6. EIA RS-232C (V.28) LEADS SUPPORTED FOR AT&T TERMINALS
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PIN PC 6300/ DTDM/ PDM/ TDM/ ADU/MADU
NO. PLUS
PC 7300
7404D MPDM MTDM (NOTE 1)
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1 X X X X X X
2 O O I I O I
3 I I O O I O
4 O I I O I
(Note 2)
5 I I O O I O
(Note 3)
6 I I O O I O
(Note 3) (Note 3)
7 X X X X X X
8 I I O O I O
(Note 3) (Note 3)
9 O O
10 O O
11
12 O I
(Note 4) (Note 4)
13
14
15 I I O O I
(Note 5)
16
17 I I O O I
(Note 5)
18 I I I O
19
20 O O I I O I
21 I O
(Note 6)
22 I I I O I
(Note 7) (Note 7) (Note 7) (Note 8)
23 I O
(Note 9) (Note 9)
24 O O I I O
(Note 5)
25 I O/I I/O
(Note 10) (Note 11) (Note 12)
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LEGEND:
X = Bidirectional
I = Input
O = Output
(Number) = Indicates a reference note (see next page).