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Chapter 6: Pinouts and Rear Transition Modules
Table 6-4: EIA-530 Connector Pin Assignments (Continued)
80-Pin Amp.
Pin No.
Signal
Name
EIA-530
Mnemonic
EIA-530 DB-25
Pin No.
Description
35
DSR2-
CC(A)
6
Port 2 Data Set Ready
36
DSR2+
CC(B)
22
Port 2 Data Set Ready
37
CTS2-
CB(A)
5
Port 2 Clear To Send
38
CTS2+
CB(B)
13
Port 2 Clear To Send
39
RXC2-
DD(A)
17
Port 2 Receive Clock
40
RXC2+
DD(B)
9
Port 2 Receive Clock
N/A
Shield
Shield
1
Port 2, See Note
41
RXD3-
BB(A)
3
Port 3 Receive Data
42
RXD3+
BB(B)
16
Port 3 Receive Data
43
DTR3-
CD(A)
20
Port 3 Data Terminal Ready
44
DTR3+
CD(B)
23
Port 3 Data Terminal Ready
45
TXD3-
BA(A)
2
Port 3 Transmit Data
46
TXD3+
BA(B)
14
Port 3 Transmit Data
47
RTS3-
CA(A)
4
Port 3 Request To Send
48
RTS3+
CA(B)
19
Port 3 Request To Send
49
TXC3-
DA(A)
24
Port 3 Transmit Clock
50
TXC3+
DA(B)
11
Port 3 Transmit Clock
51
TXCI3-
DB(A)
15
Port 3 Transmit Clock In
52
TXCI3+
DB(B)
12
Port 3 Transmit Clock In
53
DCD3-
CF(A)
8
Port 3 Data Carrier Detect
54
DCD3+
CF(B)
10
Port 3 Data Carrier Detect
55
DSR3-
CC(A)
6
Port 3 Data Set Ready
56
DSR3+
CC(B)
22
Port 3 Data Set Ready
57
CTS3-
CB(A)
5
Port 3 Clear To Send
58
CTS3+
CB(B)
13
Port 3 Clear To Send
59
RXC3-
DD(A)
17
Port 3 Receive Clock
60
RXC3+
DD(B)
9
Port 3 Receive Clock
N/A
Shield
Shield
1
Port 3, See Note
61
RXD4-
BB(A)
3
Port 4 Receive Data
62
RXD4+
BB(B)
16
Port 4 Receive Data
63
DTR4-
CD(A)
20
Port 4 Data Terminal Ready
134
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