120APPENDIX D: CABLING REQUIREMENTS

Table 31 Serial Port Pinout and Their Functions

Pin

Signal

Meaning

 

 

 

1

RTS

Request to Send

2

TxD

Transmit Data

3

RxD

Receive Data

4

DSR

Data Set Ready

5

GND

Ground

6

DTR

Data Terminal Ready

7

CTS

Clear to Send

8

RTS

Request to Send

9

NC

Not Connected

Shell

 

Protective Ground

 

 

 

Table 32 correlates the cable pinouts between the CoreBuilder 7000 and a 9-pin and 25-pin PC-AT serial interface. Unspecified pins are unused.

Table 32 Cable Pinouts To a 9-Pin and 25-Pin Serial Interfaces

CoreBuilder 7000

 

 

 

 

Serial Port

To PC-AT Serial Port

To PC-AT Serial Port

9-pin Male

9-pin Female

25-pin Female

 

 

 

 

 

 

Screen

Shell

Shell

Only req. if

Shell

Only req. if

 

 

 

screen

 

screen

TxD

2

2

RxD

3

RxD

RxD

3

3

TxD

2

TxD

GND

5

5

GND

7

GND

RTS

1

 

 

 

 

CTS

7

7

RTS

4

RTS

RTS

8

8

STS

5

CTS

DSR

4

4

DTR

20

DTR

DTR

6

6

DSR

6

DSR

 

 

 

 

 

 

Table 33 correlates cable pinouts between the CoreBuilder 7000 and a modem interface.

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3Com 7000 manual Pin Signal Meaning, Pin Male Pin Female

7000 specifications

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