Appendix A

Connector / Pin Assignment


MDI-X to MDI Connections

Almost network adapters of end stations use MDI ports. For this reason, FS3-1600 switch uses MDI-X ports for each numbered port that allow you to connect directly to end stations with normal or parallel cables (see Figure A-1).

 

Figure A-1: MDI-X to MDI cable connections

 

MDI : Media Dependent Interface is the IEEE standard for the interface to unshielded twisted pair (UTP) cable.
MDI-X : Media Dependent Interface is the IEEE standard for the interface to unshielded twisted pair (UTP) cable. Where “X” refers to the crossover function.

 


MDI-X to MDI-X Connections

 

Almost switches and hubs use MDI-X ports, therefore, you should use crossover cable to connect both FS3-1600 switch and the party of switches or hubs (see Figure A-2).

 

Figure A-2: MDI-X to MDI-X cable connections

 


Serial RS-232 Connector Pin Assignments

The serial RS-232 connector is a female 9-pin D-sub connector, as shown in Figure A-3. The pin assignments is summarized in Table A-1. The DSR and CTS signal outputs are always no connected. The CD, DTR, RTS, and RI signal inputs are not used. This arrangement allows a management station (a PC or terminal) to directly connect to the switch using a straight-through cable.

Figure A-3: DB-9 Service Port Connector

Table A-1: The Pin Assignments of Serial Connector

Pin

Signal

Description

1

CD

Carrier Detect (not used)

2

TXD

Transmit Data (output)

3

RXD

Receive Data (input)

4

DTR

Data Terminal Ready (not used)

5

GND

Signal Ground

6

DSR

Data Set Ready (not connected)

7

RTS

Request To Send (not used)

8

CTS

Clear To Send (not connected)

9

RI

Ring Indicator (not used)

Shell

-

Chassis Ground

 

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