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PHONE LINK 300

3COM CORPORATION

PHONE LINK 300

Card Type

Modem (asynchronous)

Chip Set

U.S. Robotics

Maximum Data Rate

300bps

Data Bus

External

Data Modulation Protocol

WE 103/113

54167

CONNECTIONS

Function

Label

Function

Label

Line out

CN1

DC power

CN4

Line in

CN2

Power switch

SW1

RS-232/422

CN3

   

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Originate enabled

SW2/A

Off

Answer enabled

SW2/A

On

Local echo disabled

SW2/B

Off

Local echo enabled

SW2/B

On

DIAGNOSTIC LED(S)

LED

Color

Status

Condition

ON

Red

On

Power is on

ON

Red

Off

Power is off

CD

Red

On

Carrier signal detected

CD

Red

Off

Carrier signal not detected

TS

Red

On

Test mode enabled

TS

Red

Off

Test mode disabled

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: Transmit level adjustment, this can be made by looking under the Phone Link for a screw potentiometer. Turning the screw clockwise will increase transmit level and turning the screw counterclockwise will decrease transmit level. This should be done if you are experiencing errors receiving data or the remote receiving data from the Phone Link.

Diagram not available.