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Section 3  Engineering Guidelines

TRACER 6420 System Manual

 28

Copyright © 2005 ADTRAN, Inc.

612806420L1-1A

The 

 connector provides a female DB-9 terminal connection (wired as a DCE interface), which is 

used for terminal access to the TRACER system. Table 4 shows the pinout. A null modem cable is 
necessary for connecting the 

 port to a modem for remote dial-up access. Table 5 shows the pinout 

for a null modem cable.

Figure 2 on page 29 identifies the features of the TRACER rear panel, and Table 6 on page 29 provides a 
brief description of each interface. 

1

CD

TRACER

Carrier detect

2

RXDATA

TRACER

Received data (to attached equipment)

3

TXDATA

Attached Equipment

Transmit data (from attached equipment)

4

DTR

Attached Equipment

Data terminal ready (unused)

5

GND

Common

Signal ground

6

DSR

TRACER

Data set ready

7

RTS

Attached Equipment

Request to send (unused)

8

CTS

TRACER

Clear to send

9

RI

TRACER

Ring indicator (unused)

1 (CD)

unconnected

2 (RXD)

3 (TXD)

3 (TXD)

2 (RXD)

4 (DTR)

6 (DSR)

5 (GND)

5 (GND)

6 (DSR)

4 (DTR)

7 (RTS)

8 (CTS)

8 (CTS)

7 (RTS)

9 (RI)

unconnected