ADTRAN 1200214L1 User Manual
Page 134
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110
IQ Probe User Manual
61200214L1-1
Appendix A. Pinouts
Table A-E
Pin Assignments for DB-25 to X.21 (DB-15) Adapter Cable
DB25 Pin#
X.21 Pin#
Function
1
1
SHIELD
2
2
TX (A)
3
4
RX (A)
4
3
CONTROL (A)
7
8
GROUND
8
5
INDICATION (A)
9/12
13
SIGNAL TIMING (B)
10
12
INDICATION (B)
19
10
CONTROL (B)
14
9
TX (B)
15/17
6
SIGNAL TIMING (A)
16
11
RX (B)
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