Dolby Laboratories DP503 Manuale utente

Model DP503

Two Channel AC-2/AC-3/MPEG

Digital Audio Encoder and

Dolby Fax

System

Users' Manual

MAIN

Users' Manual

For

Model DP503

Two Channel AC-2/AC-3/MPEG

Digital Audio Encoder

and

Dolby Fax

System

Dolby Laboratories Incorporated

U.S.A. 100 Potrero Avenue, San Francisco, CA 94103

Tel: 415-558-0200; Fax: 415-863-1373

www.dolby.com

U.K. Wootton Bassett, Wiltshire SN4 8QJ

Tel: 01793-842100; Fax: 01793-842101

WARRANTY INFORMATION, USA: warranty on the product covered by this manual is subject to the limitations and disclaimers

set forth in the warranty disclaimer originally shipped with the product and also printed on the back of the invoice.

All requests for repairs or information should include the unit serial number to assure rapid service.

Dolby, Dolby Fax, and the double-D symbol are registered trademarks of Dolby Laboratories Licensing Corporation.

Windows Windows NT and Window 95 are registered trademarks for Microsoft Corporation

ISSUE 1

S97/11336

Dolby Part No. 91451

MAIN

TABLE OF CONTENTS

SECTION 1 INTRODUCTION

1.1 Introduction ...............................................................................................1-1

1.2 Features......................................................................................................1-2

1.3 Dolby AC-2 and Dolby Digital (AC-3).....................................................1-2

1.4 Available Algorithms, Data Rates and Sample Rates ...............................1-3

1.5 Regulatory Notices....................................................................................1-4

SECTION 2 APPLICATIONS

2.1 Telecommunications..................................................................................2-1

Dolby Fax............................................................................................2-1

2.2 Cable..........................................................................................................2-1

2.3 Satellite / Terrestrial Radio Communications ...........................................2-2

SECTION 2A DOLBY FAX - AN OVERVIEW

2A.1 Introduction ...............................................................................................2A-1

2A.2 Algorithms and Applications.....................................................................2A-1

2A.3 Quick Start for Equipment Installation......................................................2A-2

2A.4 Quick Start for ISDN Setup.......................................................................2A-3

2A.5 Quick Start for Developing a Phone Directory..........................................2A-3

2A.6 Quick Start for Placing Dolby Fax Calls...................................................2A-4

2A.7 Receiving Dolby Fax Calls........................................................................2A-4

2A.8 Some Specific Applications ......................................................................2A-5

SECTION 3 PRE-INSTALLATION

3.1 Unpacking..................................................................................................3-1

3.2 Inspection ..................................................................................................3-1

3.2.2 Claims for Shipping Damage ..................................................3-1

3.3 Fusing Information....................................................................................3-1

Main Fuse:...........................................................................................3-1

Internal Fuse........................................................................................3-2

3.4 Configuring Jumper Settings.....................................................................3-3

Removing the Top Cover ....................................................................3-3

3.4.1 Clock Termination Jumper J12 [terminated]...........................3-3

3.4.2 Analog Audio Input Termination J13/J14 [10k ohms] ...........3-3

3.4.3 Signal Ground-to-Chassis Link J15 [open].............................3-3

3.5 Configuring the Rear Panel DIP Switch S101...........................................3-4

3.5.1 Switch nos. 1-5 - Unit Address................................................3-4

3.5.2 Switch no. 6 - Mode of Operation: Normal/Download...........3-5

3.5.5 Switch nos. 7 & 8 - Baud Rate Set..........................................3-6

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SECTION 4 INSTALLATION and LEVEL CALIBRATION

4.1 Mounting...................................................................................................4-1

4.2 Audio Connections....................................................................................4-1

4.2.1 S/PDIF Input............................................................................4-1

4.2.2 AES/EBU Input.......................................................................4-1

4.2.3 Analog Input............................................................................4-1

4.3 Data / Status / Control Connections..........................................................4-2

4.3.1 Encoded Data Out and Timing................................................4-2

4.3.2 Auxiliary Data.........................................................................4-2

4.3.3 Terminal Adapter Control.......................................................4-3

4.3.4 Remote Control.......................................................................4-3

4.3.5 Status.......................................................................................4-3

4.4 Power.........................................................................................................4-3

4.5 Level Calibration (Analog Inputs).............................................................4-3

Calibration Procedure..........................................................................4-4

4.6 Dolby Fax Connections—Additional Procedures.....................................4-4

4.6.1 Mounting.................................................................................4-4

4.6.2 Audio Connections..................................................................4-4

4.6.3 Encoded Data Out and Timing................................................4-4

4.6.4 Auxiliary Data.........................................................................4-5

4.6.5 Terminal Adapter Control.......................................................4-5

4.6.6 Remote Control.......................................................................4-5

4.6.7 Status.......................................................................................4-5

4.6.8 Power.......................................................................................4-5

4.6.9 Level Calibration.....................................................................4-6

4.6.10 ISDN Connections...................................................................4-6

SECTION 5 OPERATION

5.1 Introduction to the User Interface..............................................................5-1

5.1.1 Push-button Key Description ..................................................5-1

5.1.2 Operational Modes..................................................................5-3

5.1.3 Operational Hierarchy.............................................................5-3

5.2 Encoder Configuration..............................................................................5-4

5.2.1 To change Algorithm Type .....................................................5-5

5.2.2 To change Data Rate ...............................................................5-5

5.2.3 To change Channel Mode........................................................5-6

5.2.4 To change Sample Rate...........................................................5-6

5.2.5 To change Aux Rate (auxiliary data rate)................................5-7

5.3 ISDN Setup (for Dolby Fax applications only).........................................5-8

5.3.1 Entering ISDN Setup Mode ....................................................5-8

5.3.2 To choose Switch Type...........................................................5-9

5.3.3 To configure Line 1 (L1).........................................................5-10

5.3.4 To configure Line 2 (L2), Line 3 (L3), Line 4 (L4) ................5-12

5.3.5 Concluding ISDN Setup..........................................................5-12

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5.4 Using the DIRectory: Dolby Fax Applications..........................................5-13

5.4.1 Entering DIRectory Mode .......................................................5-13

5.4.2 Creating New Directory Entries ..............................................5-14

5.4.2.1 Using the COPY ENTRY? Feature.............................5-18

5.4.3 Using Directory Entries...........................................................5-19

5.4.4 Editing Directory Entries.........................................................5-20

5.4.5 Deleting Directory Entries.......................................................5-20

5.5 Using the DIRectory: Encoder-only Applications.....................................5-20

5.5.1 Entering DIRectory Mode .......................................................5-21

5.5.2 Creating New Directory Entries ..............................................5-22

5.5.2.1 Using the COPY ENTRY? Feature.............................5-24

5.5.3 Using Directory Entries...........................................................5-25

5.5.4 Editing Directory Entries.........................................................5-25

5.5.5 Deleting Directory Entries.......................................................5-25

APPENDIX A INTERFACE SPECIFICATIONS AND DESCRIPTIONS

APPENDIX B SOFTWARE DOWNLOADING PROCEDURE

APPENDIX C DP503 USER INTERFACE STRUCTURE

APPENDIX D ISDN ORDERING GUIDE (North America)

APPENDIX E GLOSSARY OF ISDN TERMS

MAIN

SECTION 1

INTRODUCTION

1.1 Introduction

The Dolby Model DP503 is a digital audio encoder supporting up to two channels

of Dolby AC-2, Dolby Digital (AC-3), and MPEG Layer-II digital audio coding

algorithms at data rates from 40 kbps to 448 kbps. Single channel, dual channel,

and joint stereo configurations are selectively available, depending on the chosen

data rate. A front panel menu and directory system provides convenient access to

the desired operating modes and to recall frequently used encoder settings.

This front panel user interface is also able to control an ISDN terminal

adapter/inverse multiplexer when combined with other equipment as part of a

Dolby Fax installation. The result is a flexible, multi-unit solution for real-time,

high-quality digital audio transmission on ISDN that does not require a computer,

terminal, or palmtop unit for its control. The built-in directory system, in Dolby

Fax applications, also stores ISDN settings and frequently dialed phone numbers.

For the ultimate in flexibility, the DP503 can be remotely controlled via a Windows

-

based PC for use as a stand-alone encoder or as part of a Dolby Fax system.

Both digital (AES/EBU and S/PDIF) and analog audio inputs are provided. Analog

to digital conversion is performed at 18 bit resolution. Digital inputs include a

built-in sample rate converter.

The encoder will operate in synchronization with an externally provided clock or

from its own internal time base reference. Once converted to a digital data stream

(at an internal sampling rate of 32, 44.1 or 48 kHz), the 18-bit PCM serial input

data representing both audio channels is processed using the selected algorithm and

formatted into a single serial output data stream at the selected bit rate. An

industry-standard RS-449/422 data connection simplifies incorporation into a

variety of digital communications systems, including the Dolby Fax system for real

time transmission over ISDN.

RS-232 ports are provided for remote control via a PC; software download

capability for field-upgrade of the algorithm software; auxiliary data input; and

ISDN terminal adapter/inverse multiplexer control.

The encoder provides front panel system status indicators as well as a rear-panel

connector with TTL logic levels for remote status monitoring. A digitally generated

test signal is provided for system alignment and troubleshooting and can be

activated from the front panel or via a remote control.

Rear panel analog input trimmers are provided, along with calibration LEDs on

both the front and rear panels. Front panel overload LEDs are also provided.

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1-2

This manual includes installation procedures, descriptions of Model DP503

operation, installation details, and interface specifications.

The complementary DP524 decoder unit features automatic algorithm detection to

provide foolproof operation in conjunction with the DP503. The DP524 is provided

with its own user manual.

1.2 Features

Dolby AC-2, Dolby Digital (AC-3), and MPEG Layer-II audio

coding algorithms from 40 kbps - 448 kbps

*

Mono, dual-mono, or joint stereo modes

*

Algorithm operation at 32, 44.1, 48 kHz sampling rates

*

Analog inputs with 18-bit A/D converters

Digital inputs (AES/EBU and S/PDIF)

Built-in sample rate converter and selectable internal sample rate

*

Selectable auxiliary data rates (0 - 9.6 kbps)

*

RS-449 data interface (EIA-530, V.35, and X.21 compatible)

Internal or external clock reference

RS-232 port for auxiliary data

RS-232 port for remote control via PC

RS-232 port for telco control (terminal adapter/inverse multiplexer)

Download capability for software upgrades

Front panel user interface with alphanumeric display

Ideal for use in a Dolby Fax system

Built-in test tone generator

Status indicators with rear-panel logic tallies

*

Certain restrictions apply. See product brochure.

1.3 Dolby AC-2 and Dolby Digital (AC-3)

Dolby AC-2 combines spectrum-efficient data compression with professional-

quality audio performance. Two-channel modes excel at conveying different

material such as audio and time code or separate language programming.

Despite the low, spectrum-efficient data rate, Dolby Digital yields very high audio

quality and is suitable for the most demanding of professional and consumer

distribution applications. First demonstrated to the film industry in May of 1991,

Dolby Digital audio coding technology has evolved into a very sophisticated and

flexible system for the digital representation of high quality sound. Dual channel

implementations of the Dolby Digital algorithm can be user-configured to operate

in dual mono or joint stereo modes.

Both the Dolby AC-2 and Dolby Digital algorithms are compatible with Dolby

Matrix Surround decoding. A wide range of bit rates and audio coding modes are

MAIN

1-3

supported with this audio coding technique, and are summarized in the product

brochure.

1.4 Available Algorithms, Data Rates and Sample Rates

Please refer to the product brochure packed with the unit for the most current

information.

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1-4

1.5 Regulatory Notices

FCC

This equipment has been tested and found to comply with the limits for a Class A

digital device, pursuant to part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference when the equipment is

operated in a commercial environment. This equipment generates, uses, and can

radiate radio frequency energy and, if not installed and used in accordance with this

instruction manual, may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause harmful

interference in which case the user will be required to correct the interference at his

or her own expense.

UL

Troubleshooting must be performed by trained technicians. Do not attempt to

service this equipment unless you are qualified to do so.

WARNING:

Check that the correct fuses have been installed. To reduce the risk

of fire, replace the fuses only with the same type and rating. See manual Section

3.3 for detailed fusing information.

Exposed portions of the power supply are electrically "hot". In order to reduce the

risk of electrical shock, the power cord MUST be disconnected when the cover of

this equipment is removed.

UK

Connections for the United Kingdom:

WARNING: THIS APPARATUS MUST BE EARTHED

As the colours of the cores in the mains lead may not correspond with the coloured

markings identifying the terminals in your plug, proceed as follows:

The core which is coloured green and yellow must be connected to the terminal in the

plug which is marked with the letter

E

or by the earth symbol

or coloured green or

green and yellow.

The core which is coloured blue must be connected to the terminal which is marked

with the letter N or coloured black.

The core which is coloured brown must be connected to the terminal which is marked

with the letter L or coloured red.

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1-5

IEC NOTICES

This unit complies with the EMC requirements of of EN55103-1 and EN 55103-2 when installed in an E2

environment in accordance with this manual.

IMPORTANT SAFETY NOTICE

This unit complies with the safety standard IEC65. To ensure safe operation and to guard

against potential shock hazard or risk of fire, the following

must

be observed:

o Ensure the

voltage selector

is set to the correct mains voltage for your

supply

.

o Ensure

fuses

fitted are the

correct rating and type

as marked on the unit.

o The unit

must be earthed

by connecting to a correctly wired and

earthed

power outlet.

o The

power cord

supplied with this unit must be wired as follows:

Live—Brown Neutral—Blue Earth—Green/Yellow

IMPORTANT – NOTE DE SECURITE

Ce materiel est conforme à la norme IEC65. Pour vous assurer d'un fonctionnement sans danger et de prévenir

tout choc électrique ou tout risque d'incendie, veillez à observer les recommandations suivantes.

o Le selecteur de tension doit être placé sur la valeur correspondante à votre alimentation réseau.

o Les fusibles doivent correspondre à la valeur indiquée sur le materiel.

o Le materiel doit être correctement relié à la terre.

o Le cordon secteur livré avec le materiel doit être cablé de la manière suivante:

Phase—Brun Neutre—Bleu Terre—Vert/Jaune

WICHTIGER SICHERHEITSHINWEIS

Dieses Gerät entspricht der Sicherheitsnorm IEC65. Für das sichere Funktionieren des Gerätes und zur

Unfallverhütung (elektrischer Schlag, Feuer) sind die folgenden Regeln unbedingt einzuhalten:

o Der Spannungswähler muß auf Ihre Netzspannung eingestellt sein.

o Die Sicherungen müssen in Type und Stromwert mit den Angaben auf dem Gerät übereinstimmen.

o Die Erdung des Gerätes muß über eine geerdete Steckdose gewährleistet sein.

o Das mitgelieferte Netzkabel muß wie folgt verdrahtet werden:

Phase—braun Nulleiter—blau Erde—grün/gelb

NORME DI SICUREZZA – IMPORTANTE

Questa apparecchiatura è stata costruita in accordo alle norme di sicurezza IEC 65. Per una perfetta

sicurezza ed al fine di evitare eventuali rischi di scossa êlettrica o d'incendio vanno osservate le

seguenti misure di sicurezza:

o Assicurarsi che il selettore di cambio tensione sia posizionato sul valore corretto.

o Assicurarsi che la portata ed il tipo di fusibili siano quelli prescritti dalla casa costruttrice.

o L'apparecchiatura deve avere un collegamento di messa a terra ben eseguito; anche la connessione rete deve

avere un collegamento a terra.

o Il cavo di alimentazione a corredo dell'apparecchiatura deve essere collegato come segue:

Filo tensione—Marrone Neutro—Blu Massa—Verde/Giallo

AVISO IMPORTANTE DE SEGURIDAD

Esta unidad cumple con la norma de seguridad IEC65. Para asegurarse un funcionamiento

seguro y prevenir cualquier posible peligro de descarga o riesgo de incendio, se han de observar

las siguientes precauciones:

o Asegúrese que el selector de tensión esté ajustado a la tensión correcta para su alimentación.

o Asegúrese que los fusibles colocados son del tipo y valor correctos, tal como se marca en la unidad.

o La unidad debe ser puesta a tierra, conectándola a un conector de red correctamente cableado y puesto a tierra.

o El cable de red suministrado con esta unidad, debe ser cableado como sigue:

Vivo—Marrón Neutro—Azul Tierra—Verde/Amarillo

VIKTIGA SÄKERHETSÅTGÄRDER!

Denna enhet uppfyller säkerhetsstandard IEC65. För att garantera säkerheten och gardera mot

eventuell elchock eller brandrisk, måste följande observeras:

o Kontrollera att spänningsväljaren är inställd på korrekt nätspänning.

o Konrollera att säkringarna är av rätt typ och för rätt strömstyrka så som anvisningarna på enheten föreskriver.

o Enheten måste vara jordad genom anslutning till ett korrekt kopplat och jordat el-uttag.

o El-sladden som medföljer denna enhet måste kopplas enligt foljande:

Fas—Brun Neutral—Blå Jord—Grön/Gul

BELANGRIJK VEILIGHEIDS-VOORSCHRIFT:

Deze unit voldoet aan de IEC65 veiligheids-standaards. Voor een veilig gebruik en om het gevaar van electrische

schokken en het risico van brand te vermijden, dienen de volgende regels in acht te worden genomen:

o Controleer of de spanningscaroussel op het juiste Voltage staat.

o Gebruik alleen zekeringen van de aangegeven typen en waarden.

o Aansluiting van de unit alleen aan een geaarde wandcontactdoos.

o De netkabel die met de unit wordt geleverd, moet als volgt worden aangesloten:

Fase—Bruin Nul—Blauw Aarde—Groen/Geel

GB

F

D

I

E

S

NL

MAIN

SECTION 2

APPLICATIONS

The Dolby Model DP503 is suitable for a variety of point-to-point and point-to-

multipoint digital transmission applications, including cable, telecommunications,

and satellite or terrestrial microwave links. The very high audio quality and low,

spectrum-efficient data rates of the Dolby AC-2 or Dolby Digital (AC-3) coding

processes make them particularly appropriate for these applications. The inclusion

of MPEG algorithms provides further flexibility and compatibility with MPEG

installations.

The complementary DP524 decoder unit features automatic algorithm detection to

provide foolproof operation in conjunction with the DP503.

2.1 Telecommunications

The Model DP503 can be used with T1 or ISDN lines for point-to-point

communications. Film and recording studios, as well as mastering facilities, can be

interconnected with audio and control data to enable multi-site, real-time

operations. Broadcast applications include STL, ICR, and backhaul operations.

On T1 networks, only a small portion of the T1 bit stream is used; the residual

capacity remains available for additional audio channels or other services (e.g.,

voice or computer data). Otherwise, fractional service can be ordered. In ISDN

applications, the number of "B" channels needed is determined by the chosen bit

rate.

Dolby Fax

The DP503 is particularly suited to the Dolby Fax system, which provides the

highest quality real time digital audio transmission over ISDN phone circuits.

Originally limited to the Dolby AC-2 audio coding algorithm, the additional

capabilities of the DP503 in incorporating Dolby Digital (AC-3) and MPEG Layer-

II algorithms expands the applications possibilities, including operation at lower

data rates (hence, fewer ISDN lines) and interoperability with other ISDN

telecommunications hardware platforms.

Dolby Fax now permits contribution audio at the highest quality consistent with the

application and budget constraints. Voiceover work may be an application where

the ultimate in quality can be sacrificed for a savings in data rate; conversely,

playback for quality control purposes or mix approvals would dictate higher

quality. More information can be found in Section 2A and in the Appendices.

2.2 Cable

Whether for audio-only services or for an enhanced digital audio service

accompanying video, the DP503 is ideally suited to cable applications. The

availability of low data rates permits efficient use of cable bandwidth as either a

baseband signal or as a subcarrier above video.

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2-2

Decoder circuitry can be readily incorporated into set-top decoder hardware, or

integrated directly into consumer receiver equipment.

2.3 Satellite / Terrestrial Radio Communications

With suitable digital modulation equipment, the Model DP503 can be used for

various satellite broadcast/distribution applications including subcarrier, band-

edge, and SCPC schemes. It can also provide the basis for a spectrum-efficient

terrestrial radio system (e.g., STL, backhaul, or inter-city relay), either as an audio

link or as part of a combined video/audio link. For these applications, a digital

modem that can accept an RS-449/422 data connection is required. The DP503 can

be used successfully with the BPSK or QPSK digital modulation techniques typical

in the satellite industry, and with any degree of forward error correction (FEC)

desired. Given the variety of available data rates, users are free to determine the

tradeoffs between audio quality, bandwidth, cost, spectrum-efficiency, power, and

robustness in determining their transmission parameters.

MAIN

SECTION 2A

DOLBY FAX - AN OVERVIEW

2A.1 Introduction

The Dolby Fax system allows high quality audio to be sent over ISDN telephone

lines. With a complete encode/decode system, communication is full duplex; i.e.

two high quality audio channels can be sent in both directions at the same time.

Time code can also be sent down an audio channel. An additional auxiliary channel

can be used for signaling and data at 1200 baud. Where bi-directional two-channel

audio and synchronization is required, additional equipment can be used to send

and receive time code via the auxiliary data channel.

Audio inputs to the Dolby Fax are both analog and digital. The signal is converted

to PCM in the Dolby Model DP503 encoder. Three different audio coding

methods—Dolby AC-2 (the de facto standard in film and music) as well as the

Dolby Digital (AC-3) and MPEG Layer II— audio coding is used to reduce the bit

rate of the digital audio to a single bit stream of 56-384 kbps, incorporating 1 or 2

audio channels and the auxiliary data. This bit stream is sent to the ISDN terminal

adapter/inverse multiplexer unit, which interfaces with the public telephone

network, executes dialing, and handles differing call configurations between

countries. If needed, the digital data stream is divided up (inverse multiplexed) and

sent over several phone calls and is reassembled correctly at the destination. The

Dolby Model DP524 decoder converts the bit stream to audio and subsequently

feeds both analog and digital outputs.

2A.2 Algorithms and Applications

The Dolby Fax system has built its reputation as being the de facto standard for

high quality audio using Dolby AC-2. With this reputation, a worldwide network

has been created which includes recording studios, film dubbing stages, record

labels, video post houses and home studios.

One of the most important new features of the Dolby Fax system is its ability to

connect to MPEG codecs, providing compatibility with users outside of the Dolby

Fax network of studios. Now with this addition, you have access to locations

whose work typically includes voice-over and jingle work.

To remain compatible with the existing network of Dolby Fax locations using

Dolby AC-2, two BRI lines—each with two 64 kb B channels—are needed for two

channels of "CD quality" 20 kHz audio. Dolby Fax with AC-2 can also operate at

384 kbps in situations where low coding delay is required. In this format, 3 BRI

lines are required at each location

MPEG locations, using codecs from companies such as Telos, Musicam USA

(formerly CCS) and RE typically operate at 56/112 kbps or 64/128 kbps for voice

over sessions and broadcast remotes. Switched 56 is used for 56/112 type calls,

while ISDN is used for 64/128 sessions. Calls at 56/64 kbps provide a 7-10 kHz

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2A-2

audio bandwidth while 112/128 kbps calls provide 15-20 kHz audio bandwidth.

The 112/128 calls combine or "inverse multiplex" the two switched 56 or 64 kbps

ISDN B channels together to provide a higher bandwidth transmission path. Sites

that conform to the international inverse multiplexing standard Bonding Mode 1

can be accessed with your Dolby Fax system. Refer to the glossary in Appendix E

for more information on inverse multiplexing.

The DP503 also offers Dolby Digital (Dolby AC-3) in mono, stereo and joint

stereo modes with data rates ranging from 56-384 kbps. With this range of data

rates and their associated audio bandwidths, you can determine the tradeoff you

would like to make in terms of audio quality and call cost; this flexibility is

available when connecting to other Dolby Fax users with the DP503/DP524 codec

equipment. Dolby Digital (Dolby AC-3) is the same technology used in the Dolby

Digital film format, the DVD, US Advanced Television, as well as cable radio and

satellite audio services.

ISDN

256

kbit/s

256

kbit/s

2 Chnls

Audio +

Data

2 Chnls

Audio +

Data

DP503

Encoder

DP524

Decoder

256

kbit/s

256

kbit/s

2 Chnls

Audio +

Data

2 Chnls

Audio +

Data

DP524

Decoder

DP503

Encoder

ISDN TA/

Imux

ISDN TA/

Imux

Dolby Fax - Send and Receive system

Fig 1. Dolby Fax Sample Block Diagram

2A.3 Quick Start for Equipment Installation

Note

:

Refer to Sections 4 and 5 for comprehensive information.

Pre-Installation involves:

Unpacking

Inspection for damage

Checking fusing

Configuring internal jumpers (DP503 & DP524)

Configuring rear panel switches (DP503 & DP524)

Mounting rack ears (ISDN unit)

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2A-3

Installation involves:

Equipment mounting

Audio connections

Data / Status / Control connections

Using the “Y” cable to interconnect the DP503, DP524 and ISDN unit

Applying power

Analog audio calibration

ISDN connections

2A.4 Quick Start for ISDN Setup

Note:

Refer to Section 5 for a comprehensive procedure and details on user interface. Section 6.3 is

devoted to ISDN Setup. Refer also to Appendices D & E for ISDN background information.

1. Select ISDN Setup by pressing SHIFT + DIR

2. Pick the appropriate switch type under the menu heading SW.

3. Enter your phone numbers (and SPIDs, if needed) under the menu headings

L1, L2, L3, L4 as needed (typical Dolby Fax installations use only 2 lines,

so only L1 and L2 will be used.). Leave unused lines disabled.

4. Store ISDN settings by pressing the ESC key and answering Y to the

UPDATE TA? inquiry.

5. Reset the ISDN unit by cycling mains power.

2A.5 Quick Start for Developing a Phone Directory

Notes:

Refer to Section 5.4 for a comprehensive procedure on entering directory items.

Do

not

begin a Dolby Fax directory entry with an asterisk, as that signifies an encoder-only entry (See Section

6.4.2)

1. Press DIR.

2. Select NEW. Use COPY ENTRY if modeling a new entry from an

existing one.

3. Enter required information. Be sure that encoder and ISDN unit parameters

match the capabilities of the site you will be calling. Default Dolby Fax

entries are:

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2A-4

Parameter Value

Algorithm Type AC-2

Data Rate 256

Channel Mode 2C

Sample Rate 48

Aux Rate 12

ISDN (Inverse Multiplexing type) BONDING-1 64

4. Save the directory entry.

2A.6 Quick Start for Placing Dolby Fax Calls

Note

Refer to Section 5.4.3 for a comprehensive procedure on making calls.

1. Press

DIR.

2. Select

USE

.

3. Find the desired directory listing by scrolling with the ÇÈ keys.

4. Press ENTER. The call will be initiated. Look for ÆÆLOCATION on

the display to confirm that the call is established.

Hint:

You will also see the

Lock

LED on the DP524 become green, and the

Mute

LED on the DP524

extinguish.

5. Remember to Hang Up by pressing Shift + È or ESC. Select Y to

confirm.

2A.7 Receiving Dolby Fax Calls

Call setup is automatic: The ISDN unit will automatically answer an incoming call,

and the DP524 decoder unit will automatically configure itself for the proper

algorithm.

But, your DP503 encoder must be manually set to match the incoming call:

1. With the DP503 in the default encoder parameters screen, make

adjustments to the encoder, if necessary, to match the incoming algorithm,

data rate, channel mode, sample rate, and aux rate.

Note:

Refer to Section 5.2 for a comprehensive procedure on changing encoder parameters.

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