APPENDIX B

INTERFACE PIN ASSIGNMENT

EIA-530 Interface Pin Description

(DB-25 Female Connector)

(DCE Configuration)

Pin #

Signal

 

 

1

FG (Frame Ground)

2

TD (Transmit Data)

 

 

3

RD (Receive Data)

 

 

4

RTS (Request to Send)

 

 

5

CTS (Clear to Send)

 

 

6

DSR (Data Set Ready)

 

 

7

SGND (Signal Ground)

 

 

8

CD (Carrier Detect)

 

 

9

RC/ (Receive Timing-B)

 

 

10

CD/ (Carrier Detect-B)

 

 

11

XTC/ (External Transmit Clock)

 

 

12

TC/ (Transmit Clock-B)

 

 

13

CTS/ (Clear to Send)

 

 

14

TD/ (Transmit Data-B)

 

 

15

TC (Transmit Clock-A)

 

 

16

RD (Receive Data)

 

 

17

RC (Receive Timing)

 

 

18

LLB (Local Line Loop)

 

 

19

RTS/ (Request to Send)

 

 

20

DTR (Data Terminal Ready)

 

 

21

DL (Remote Digital Loop)

 

 

22

DSR/ (Data Set Ready)

 

 

23

DTR/ (Data Terminal Ready)

 

 

24

XTC (External Transmit Clock)

 

 

25

TM (Test Mode)

 

 

23

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Patton electronic 2701/C, 2701/B, 2701/D user manual Appendix B