Accton Technology 12i, 12mi SNMP manual DB9 Serial Port Pin Description, Ccitt

Fast EtherHub 3500 System User’s Guide

DB9 Serial Port Pin Description

Figure B-2

DB9 Serial Port

(on the Hub Side)

The DB9 serial port on the front panel is used to connect the hub to a management device. The on-board menu-driven configuration program can be accessed from a terminal, a PC running a terminal emulation program, or from a remote location via a modem connection. In-band management software (which usually provides a graphical interface) can also be used to manage the hub from a remote location via a modem connection, by running SLIP over TCP/IP. You can use the managment port to configure port settings (e.g., enabled or disabled), or to update device firmware. The pin assignments used to connect various device types to the hub’s managment port are provided in the following tables.

EIA

Circuit

CF

BB

BA

CD

AB

CC

CA

CB

CE

CCITT

Signal

109

104

103

108.2

102

107

105

106

125

Description

DCD (Data Carrier Detected)

RxD (Received Data)

TxD (Transmitted Data)

DTR (Data Terminal Ready)

SG (Signal Ground)

DSR (Data Set Ready)

RTS (Request-to-Send)

CTS (Clear-to-Send)

RI (Ring Indicator)

Hub’s

DB9 DTE

Pin #

1

2

3

4

5

6

7

8

9

PC DB9

DTE

Pin #

1

2

3

4

5

6

7

8

9

Modem

DB25 DCE

Pin #

8

3

2

20

7

6

4

5

22

Signal

Direction

DTE -DCE

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Table B.2 DB9 Port Pin Assignments

B-2 Pin Assignments