Voltage Valet PDT User Manual

Protect Your Modem!

Recently many businesses and
hotels began using digital phone
systems in place of analog phone
systems. These digital systems
provide high-current phone lines
that can damage most computer
modems. Since both safe analog
lines and dangerous digital lines
use the same type of connectors,
it is impossible to visually
determine if a phone line is safe.
Use Voltage Valet’s Digital Phone
Line Tester before you plug in to
detect high-current digital
telephone lines that can damage
your computer modem.
Model PDT

• Detects Dangerous Digital
Phone Lines Or Safe Analog
Lines

• Surge Suppression Circuit
Protects Against Voltage
Spikes And Surges

• Tests 2-Line

• Tests For

• Uses Standard RJ11 Jack And
Plug NOTE: A Voltage Valet
International Phone Adaptor
may be required when used
outside North America.

Voltage Valet Division

Santa Rosa, CA 95407

Phone Systems

Polarity

Hybrinetics, Inc.

225 Sutton Place

©1999 HYBRINETICS, INC.

DIGITAL
PHONE LINE
TESTER

Detects dangerous digital phone

lines and protects your computer

modem from voltage spikes and

surges.

Digital Phone Line Tester

Model PDT

Instructions

IMPORTANT: Always test the phone line before connecting your computer

modem.

RJ11 J

ACK

MO DEM

TE ST

Step 1. Test line 1 by setting the Line Switch to position “1”. Position “1” on
Line Switch tests the inside wire pair. Position “2” on Line Switch tests the
outside wire pair.

Step 2. Connect the RJ11 plug at the LINE end of “Digital Phone Line Tester” to
the RJ11 phone line jack you want to test. NOTE: Outside North America you
may need an International Telephone Outlet Adaptor to convert a foreign
telephone jack to an RJ11 jack. See country list in Voltage Valet’s Foreign
Electricity Guide for proper adaptor.

Step 3. Press the “TEST” button.

RED light indicates a digital line. DO NOT USE LINE.
GREEN light indicates a safe analog line.
YELLOW light indicates a safe analog line with reversed polarity. Phone line

is safe but reversed polarity may slow data transmission rates.

NO LIGHT indicates no signal present on the phone line. Set line switch to
position “2” and repeat steps above.

Step 4. To use the surge suppression circuit, leave the “Digital Phone Line
Tester” plugged into the phone line jack as described in Step 2 and connect the
RJ11 plug from the computer modem to the RJ11 jack at the MODEM end of
“Digital Phone Line Tester.”

One Year Warranty

We guarantee each new Digital Phone Line Tester to be free from defects in material or
workmanship and to perform under normal use and service. This guarantee shall run for a
period of one year from the date of purchase, and obligations under this guarantee are
limited to remedying any defect or replacing any defective part and shall be effective only if
the defective unit is returned to us within 12 months after purchase. Damage due to abuse,
misuse, or overloading is not covered by this guarantee. We shall not be responsible for
any other loss or damage that may arise through the use by a purchaser or others of this
device, and the purchaser assumes such responsibility and will hold Hybrinetics, Inc.
harmless in respect to all such loss or damage.
Important: This is a factory direct warranty. Do not return defectives to your retailer. All
defectives must be returned to the factory accompanied by a sales receipt with the original
date of purchase.

225 Sutton Place, Santa Rosa, CA 95407 Tel: [phone] Fax: [phone]

Voltage Valet Division, Hybrinetics, Inc.

e-mail: [e-mail] Web site: www.voltagevalet.com

1

2

LINE SWITCH

Red Yellow Green

RJ11 PLUG

LI NE

�

�