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Pinouts
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
64
DTR4+
CD(B)
23
Port 4 Data Terminal Ready
65
TXD4-
BA(A)
2
Port 4 Transmit Data
66
TXD4+
BA(B)
14
Port 4 Transmit Data
67
RTS4-
CA(A)
4
Port 4 Request To Send
68
RTS4+
CA(B)
19
Port 4 Request To Send
69
TXC4-
DA(A)
24
Port 4 Transmit Clock
70
TXC4+
DA(B)
11
Port 4 Transmit Clock
71
TXCI4-
DB(A)
15
Port 4 Transmit Clock In
72
TXCI4+
DB(B)
12
Port 4 Transmit Clock In
73
DCD4-
CF(A)
8
Port 4 Data Carrier Detect
74
DCD4+
CF(B)
10
Port 4 Data Carrier Detect
75
DSR4-
CC(A)
6
Port 4 Data Set Ready
76
DSR4+
CC(B)
22
Port 4 Data Set Ready
77
CTS4-
CB(A)
5
Port 4 Clear To Send
78
CTS4+
CB(B)
13
Port 4 Clear To Send
79
RXC4-
DD(A)
17
Port 4 Receive Clock
80
RXC4+
DD(B)
9
Port 4 Receive Clock
N/A
Shield
Shield
1
Port 4, See Note
Note: There is a shield conductor; the shield connects the metal shell of each 25-pin D-Sub
connector together. It also connects to pin 1 of each 25-pin D-Sub connector. This provides a
continuous metal barrier around the signal wires that helps to contain the common mode noise
that radiates from the cable. Additionally, the cable has a shield layer to provide this barrier.
The cable also has a "trace" wire that touches the shield and attaches to pin 1 of each 25-pin
D-Sub connector. The trace wire is not assigned to a pin at the interface of the PCB (80-pin
AMP connector).
V.35 Supported Signals
This configuration supports the V.35 standard in a DTE or DCE format. The V.35 Standard is
also supported through a “Hydra” cabling option. The signals supported and their positions in
both of the 80-pin connectors are shown in Table 6-5 (DTE) and Table 6-6 on page 138 (DCE).
Note: Some of the 80 pins in the connector may not be included in the table. For each electrical
standard, the pins that are not included in the table for that standard MUST BE LEFT
UNCONNECTED.
135
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