USER MANUAL, MSD-4, PT# 101012
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8
EAST COAST DATACOM, INC.
4.0 - APPENDIX
4.1
Serial
Port
Pinouts
MASTER
PORT
IS
A
DTE
–
Connect
to
a
DCE
Pin No.
CCITT
Circuit
Circuit
Name
Signal Description
To DTE
To DCE
1
‐‐‐
‐‐‐
Shield
‐‐‐
‐‐‐
2
103
BA
Send
Data
X
3
104
BB
Receive
Data
X
4
105
CA
Request
To
Send
X
5
106
CB
Clear
To
Send
X
6
107
CC
DCE
Ready
X
7
102
AB
Signal
Ground
‐‐‐
‐‐‐
8
109
CF
Receive
Line
Detector
X
15
114
DB
Send
Timing
X
17
115
DD
Receive
Timing
X
20
108.2
CD
Terminal
Ready
X
22
125
CE
Ring
Indication
X
24
113
DA
External
Timing
X
SUB
‐
CHANNEL
PORT
IS
A
DCE
–
Connect
to
a
DTE
Pin No.
CCITT
Circuit
Circuit
Name
Signal Description
To DTE
To DCE
1
‐‐‐
‐‐‐
Shield
‐‐‐
‐‐‐
2
103
BA
Send
Data
X
3
104
BB
Receive
Data
X
4
105
CA
Request
To
Send
X
5
106
CB
Clear
To
Send
X
6
107
CC
DCE
Ready
X
7
102
AB
Signal
Ground
‐‐‐
‐‐‐
8
109
CF
Receive
Line
Detector
X
15
114
DB
Send
Timing
X
17
115
DD
Receive
Timing
X
20
108.2
CD
Terminal
Ready
X
22
125
CE
Ring
Indication
X