Radio Shack 43-443 Instructions

Cat. No.

43-443

Single Line-Status Indicator

Your RadioShack Single Line-Status Indicator quickly connects

to your telephone line and lets you know when your telephone

line is in use by another device, to avoid interruption of phone

conversations and fax or modem transmissions.

When a telephone device is in use on the same line as the line-

status indicator, its red lightbar lights. If there is an incoming

call, the red lightbar flashes. The lightbar turns off when the line

is free. 

The line-status indicator has been tested and found to comply

with all applicable UL and FCC standards.

This symbol is intended to alert you to the presence of unin-

sulated dangerous voltage within the product’s enclosure

that might be of sufficient magnitude to constitute a risk of

electric shock. Do not open the product’s case.

This symbol is intended to inform you that important operat-

ing and maintenance instructions are included in the litera-

ture accompanying this product.

READ THIS BEFORE INSTALLATION

We have designed your line-status indicator to conform to fed-

eral regulations, and you can connect it to most telephone lines.

However, each device you connect to the phone line draws

power from the phone line. We refer to this power draw as the

device’s 

ringer equivalence number

, or REN. The REN is on the

bottom of your line-status indicator.

If you are using more than one phone or other device on the

line, add up all the RENS. If the total is more than five, your

phones might not ring. In rural areas, a total REN of three might

impair ringer operation. If ringer operation is impaired, discon-

nect one of the devices from the line.

INSTALLATION

Follow these steps to connect the line-status indicator to your

telephone or another telephone device.

1. Disconnect the modular telephone line cord from your tele-

phone.

2. Connect the telephone’s line cord to the line-status indica-

tor’s modular jack.

3. Connect the line-status indicator’s modular line cord to the

telephone’s modular jack.

After you connect the line-status indicator to your telephone,

you can use the supplied double sided foam tape to mount the

indicator near your phone jack. 

CAUTION

RISK OF ELECTRIC SHOCK.

DO NOT OPEN.

CAUTION

: TO REDUCE THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE

COVER OR BACK. NO USER-SERVICE-

ABLE PARTS INSIDE. REFER SERVIC-

ING TO QUALIFIED PERSONNEL.

WARNING: To reduce the risk of fire

or shock hazard, do not expose this

product to rain or moisture.

!

!

©

 1998 Tandy Corporation.

All Rights Reserved.

RadioShack is a registered trademark used by Tandy Corporation.

43-443.fm  Page 1  Friday, August 13, 1999  8:28 AM