HwMuseum | Index

WESTERMO TELEINDUSTRI AB

MD-21

Card Type

Modem

Chip Set

Unidentified

I/O Options

9-pin serial port (RS-232), terminal blocks (3)

Maximum Modem Rate

19.2Kbps

Data Modulation Protocol

ITU-T V.24/V.28

Error Correction/Compression

Unidentified

Data Bus

External

CONNECTIONS

Function

Label

Function

Label

DCE serial port (terminal block)

CN1

Network interface (terminal block)

CN3

Power connector (terminal block)

CN2

9-pin serial port

CN4

INVERTED TRANSMITTER/RECEIVER SELECTION

Setting

S1/1

S1/2

»

Transmitter and receiver normal

Off

Off

 

Transmitter inverted, receiver normal

On

Off

 

Transmitter normal, receiver inverted

Off

On

 

Transmitter and receiver inverted

On

On

RECEIVER ACTIVE/PASSIVE SELECTION

Setting

S3/1

S3/2

S3/3

S3/4

S3/5

S3/6

»

Passive

On

On

Off

Off

Off

Off

 

Active

Off

Off

On

On

On

On

TRANSMITTER ACTIVE/PASSIVE SELECTION

Setting

S4/1

S4/2

S4/3

S4/4

S4/5

S4/6

»

Passive

On

On

Off

Off

Off

Off

 

Active

Off

Off

On

On

On

On

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

PWR

Unidentified

On

Power is on

PWR

Unidentified

Off

Power is off

RD

Unidentified

On

Modem is receiving data

RD

Unidentified

Off

Modem is not receiving data

TD

Unidentified

On

Modem is transmitting data

TD

Unidentified

Off

Modem is not transmitting data