X.21 Interface

(DB-15 Female Connector)

(DTE /DCE Configuration)

Pin #

Signal

 

 

1

Frame Ground

2

T (Transmit Data-A)

 

 

3

C (Control-A)

 

 

4

R (Receive Data-A)

 

 

5

I (Indication-A)

 

 

6

S (Signal Element Timing-A)

 

 

7

BT (Byte Timing-A)

 

 

8

SGND (Signal Ground)

 

 

9

T/ (Transmit Data-B)

 

 

10

C/ (Control-B)

 

 

11

R/ (Receive Data-B)

 

 

12

I/ (Indication-B)

 

 

13

S/ (Signal Element Timing-B)

 

 

14

BT/ (Byte Timing-B)

 

 

26

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Image 26
Patton electronic 2073RC user manual Frame Ground