Black Box DRD-4 User Manual

CUSTOMER

SUPPORT

INFORMATION

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FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [e-mail]

JULY 1992

FX140A

DRD-4

DRD-4

2

DRD-4

FEDERAL COMMUNICATIONS COMMISSION

RADIO FREQUENCY INTERFERENCE STATEMENT

This equipment generates, uses, and can radiate radio frequency energy and
if not installed and used properly, that is, in strict accordance with the
manufacturer’s instructions, may cause interference to radio communication.
It has been tested and found to comply with the limits for a Class A
computing device in accordance with the specifications in Subpart J of Part 15
of FCC rules, which are designed to provide reasonable protection against
such interference when the equipment is operated in a commercial
environment. Operation of this equipment in a residential area is likely to
cause interference, in which case the user at his own expense will be required
to take whatever measures may be necessary to correct the interference.

Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

“This digital apparatus does not exceed the Class A limits for Radio noise
emission from digital apparatus set out in the Radio Interference Regulation
of the Canadian Department of Communications.”

“Le présent appareil numérique n’émet pas de bruits radioélectriques
dépassant les limites applicables aux appareils numériques de la classe A
prescrites dans le Règlement sur le broiullage radioélectrique édicté par le
ministère des Communications du Canada.”

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TABLE OF CONTENTS

Contents

Chapter Page

1. Specifications ......................................................................................... 4

2. Introduction........................................................................................... 5

2.1 General ......................................................................................... 5

2.2 Ports on the DRD-4 ...................................................................... 5

2.3 Functions of the DRD-4 ............................................................... 7

3. Installing the DRD-4.............................................................................. 8

3.1 Installing the DRD-4 on a Single Line ........................................ 8

3.2 Installing the DRD-4 on a Single Line with Multiple

Phones and Maintaining Exclusion............................................10

3.3 Installing the DRD-4 on Two Lines with Single-Line and
Two-Line Phones (with the DRD-4 connected to one

extension) ....................................................................................11

3.4 Installing the DRD-4 on a KSU/PBX System .............................14

4. Using the DRD-4....................................................................................16

5. Troubleshooting ....................................................................................17

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DRD-4DRD-4

1. Specifications

Connectors — (5) RJ-11 female,
(1) power

Power — 115 VAC, 60 Hz

Size — 1.75"H x 5.6"W x 6"D (4.4 x

14.2 x 15.2 cm)

Weight — 3 lb. (1.4 kg)

Speed — Transparent

Operation — Transparent

Diagnostics — None

FCC Registration —

BEQUSA-18976-KX-N

Ringer Equivalency — 0.6 B

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DRD-4CHAPTER 2: Introduction

2. Introduction

NOTE: The name “Distinctive Ringing

Service” may vary with each
telephone company. This service
may not be available in some
locations. Contact your local
telephone company to verify that the
service is available in your area.

The DRD-4 is compatible with any
telephone device that responds to
a standard phone company ring
signal. This guide defines a few of
the more popular combinations
used with the DRD-4.

2.2 Ports on the DRD-4

The rear panel of the DRD-4 includes
five modular ports and a power input
port, as shown in Fig. 2-1.

2.1 General

The DRD-4 deciphers the
“Distinctive Ringing Service”
provided by the telephone company.
This service uses a single phone line
for multiple phone numbers and
assigns a unique ring identity to each
number. Working with this service,
the DRD-4 identifes and directs each
of the four ring types to a designated
telephone device. You can connect
up to four different telephone
devices to a single telephone line,
giving you automatic operation and
eliminiating the need to flip switches
and turn machines on or off.

TEL LINE-IN

STYLE 1 STYLE 2 STYLE 3 STYLE 4

12 VAC

Fig. 2-1. Rear View of the DRD-4.

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DRD-4DRD-4

STYLE 4 port—This port rings with
a short-long-short ring cadence. Use
this port for any telephone device
that you wish to respond to the

the phone company.

• The DRD-4 recognizes each ring
cadence and automatically
directs each call to its intended
destination.

• The DRD-4 allows any phone
directly connected to the unit to
answer all phone calls during the
ring signal. Once you answer a
call, the DRD-4 will not allow any
of its ports to interrupt a call to
another port. This feature
ensures your privacy during
phone calls and guarantees data
integrity when you use data
equipment.

NOTE: Only the phones connected to a port

will ring when calls are directed to
that port, but you can answer those
calls from other phones.

STYLE 4

fourth phone number.

Fig. 2-6. Style 4 Port.

NOTE: The dashed lines above each port

correspond to the port’s unique ring
cadence.

2.3 Functions of the DRD-4

The DRD-4 is compatible with any
type of telephone device that
responds to a standard phone­company ring signal. It functions as
follows:

• The DRD-4 monitors the
telephone line for the four
distinctive ring cadences from