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MICRO LINK 300

U.S. ROBOTICS, INC.

MICRO LINK 300

Card Type

Modem (asynchronous)

Chip Set

U.S. Robotics

Maximum Data Rate

300bps

Data Bus

External

Data Modulation Protocol

Bell 103/113

V2251

CONNECTIONS

Function

Label

Function

Label

Line out/in - unidentified

CN1

DC power

CN4

Line in/out - unidentified

CN2

Power switch

SW1

RS-232/422

CN3

Analog loopback switch

SW2

RS232C

Setting

SW3/A

SW3/B

SW3/C

SW3/D

Pin 2 receive/Pin 3 send

On

On

Off

Off

Pin 2 send/Pin 3 receive

Off

Off

On

On

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

ON

Red

On

Power is on

ON

Red

Off

Power is off

AL

Red

On

Modem is in analog loopback test mode

AL

Red

Off

Modem is not in analog loopback test mode

SD

Red

On

Modem is transmitting data

SD

Red

Off

Modem is not transmitting data

RD

Red

On

Modem is receiving data

RD

Red

Off

Modem is not receiving data

MISCELLANEOUS TECHNICAL NOTES

Note: Diagram not available.