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SRM-8

RAD DATA COMMUNICATIONS, INC.

SRM-8

Card Type

Modem (synchronous/asynchronous)

Chipset

Unidentified

Maximum Data Rate

19.2Kbps

Data Bus

Serial

Data Modulation

Unidentified

CONNECTIONS

Function

Label

Function

Label

V.24 serial port

CN1

Line out (see pinout below)

SC1

SC1 PINOUT

Function

Screw

Function

Screw

Receive line

1

Transmit line

4

Receive line

2

Transmit line

5

Ground

3

   

USER CONFIGURABLE SETTINGS

Setting

Label

Position

í SW1 position 3 enters remote digital loopback test

J1

Closed

SW1 position 3 enters has no function

J1

Open

í Stop bit shortened by 12.5% in asynchronous mode

SW3/1

Off

Stop bit shortened by 25% in asynchronous mode

SW3/1

On

í CD signal forced high

SW3/4

Off

CD signal follows RTS

SW3/4

On

í Pin 18 of CN1 has no function

SW3/5

Off

Pin 18 of CN1 begins local analog loopback test

SW3/5

On

í Pin 21 of CN1 has no function

SW3/6

Off

Pin 21 of CN1 begins remote digital loopback test

SW3/6

On

CHARACTER LENGTH SELECTION

Setting

SW3/2

SW3/3

8 bits

Off

Off

9 bits

Off

On

í 10 bits

On

Off

11 bits

On

On

TEST MODE SELECTION

Setting

SW1

Start local analog loopback test

Position 1

í Normal operation

Position 2

Start remote digital loopback test

Position 3

LINE SPEED SELECTION

Setting

SW2

1200bps

Position 7

2400bps

Position 6

3600bps

Position 5

4800bps

Position 4

7200bps

Position 3

í 9600bps

Position 2

14.4Kbps

Position 1

19.2Kbps

Position 0

RTS TO CTS DELAY SELECTION

Setting

J2/A

J2/B

J2/C

0 mS

Open

Open

Closed

í 8 mS

Open

Closed

Open

64 mS

Closed

Open

Open

TRANSMIT CLOCK SOURCE SELECTION

Setting

J3/A

J3/B

J3/C

J3/D

Asynchronous mode

Closed

Open

Open

Open

Remote clock source

Open

Closed

Open

Open

í Internal clock source

Open

Open

Closed

Open

External clock source

Open

Open

Open

Closed

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

LED

Red

On

Modem is in test mode

LED

Red

Off

Modem is not in test mode