CHAPTER 4 : GENERAL INFORMATION AND FEATURES
Appendix II: DT-128 DTE Interface DB-25 DIP Assignment Table
ISO 2110
PIN No.
RS-232
(V.24)
EIA 530
V.35 X.21 Electrical
Spec.
Signal
Direction
Circuit Description
1 PG
PG
-
A
-
Frame Ground
2 TD
103
103a, BA (A) P
103a V.11
DCE
DTE Transmitted Data A
3 RD
104
104a, BB (A) R
104a V.11
DCE
DTE Received Data A
4 RTS
105
105a, CA (A) C
105
V.11
DCE
DTE Request to Send A
5 CTS
106
106a, CB (A) D
V.11
DCE
DTE Clear to Send A
6 DSR
107
107a, CC
E
V.10
DCE
DTE DCE Ready
7 SG
102
102, AB
B
102
Signal Common
8 DCD
109
109a, CF (A) F
109a V.11
DCE
DTE Received Line Signal
Detector A
9
115b, DD (B) X
V.11
DCE
DTE DCE Receiver Signal
Element Timing B
10
109b, CF (B)
109b V.11
DCE
DTE Received Line Signal
Detector B
11
113b, DA (B) W
V.11
DCE
DTE DTE Transmit Signal
Element Timing B
12
114b, DB (B) AA
114b V.11
DCE
DTE DCE Transmit Signal
Element Timing B
13
106b, CB (B)
V.11
DCE
DTE Clear to Send B
14
103b, BA (B) S
103b V.11
DCE
DTE Transmitted Data B
15 TC
114
114a, DB (A) Y
114a V.11
DCE
DTE DCE Transmit Signal
Element Timing A
16
104b, BB (B) T
104b V.11
DCE
DTE Received Data B
17 RC
115
115a, DD (A) V
V.11
DCE
DTE DCE Receiver Signal
Element Timing A
18
LL
V.10 DCE
DTE Local Loop-back
19
105b, CA (B)
105b V.11
DCE
DTE Request to Send B
20 DTR
108
108a, CD
V.10
DCE
DTE DTE Ready
21
RL
V.10 DCE
DTE Remote Loop-back
22 107b,
CE
J
V.10
DCE
DTE Ring Indicator
23
108b,
AC
DCE
DTE Signal Common
24 EXC
113
113a, DA (A) U
V.11
DCE
DTE DTE Transmit Signal
Element Timing A
25
TM
V.10 DCE
DTE Test Mode
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Содержание DT-128 Series
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