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DECconcentrator 500

Multimode Option Card Installation

March 1993
This manual describes how to install and check the
DECconcentrator 500 multimode option cards.
Supersession/Update Information: This is a revised manual.

Order Number: EK-DEFCN-MM. C01

CAUTION
People installing the cabling system described in this manual should know local building
codes, fire codes, and any other applicable codes or regulations. The manufacturers or their
distributors and agents will not be responsible for damage due to improperly installed
cabling, neglect, misuse, or improper connection of devices to the cabling system.

CAUTION
This equipment is in the 1st Class category (information equipment to be used in
commercial and/or industrial areas) and conforms to the standards set by the Voluntary Control Council For Interference by Data Processing Equipment and Electronic
Office Machines aimed at preventing radio interference in commercial and/or industrial areas. Consequently, when used in a residential area or in an adjacent area
thereto, radio interference may be caused in radios and TV receivers, etc. Read the
instructions for correct handling.

NOTICE – Class A Computing Device:
This equipment generates, uses, and may emit radio frequency energy. The equipment
has been type tested and found to comply with the limits for a Class A computing device
pursuant to Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable
protection against such radio frequency interference when operated in a commercial
environment. Operation of this equipment in a residential area may cause interference; in
which case, measures taken to correct the interference are at the user’s expense.

DECconcentrator 500

Multimode Option Card Installation

Order Number: EK-DEFCN-MM. C01

EK-DEFCN-MM. C01

The information in this document is subject to change without notice and should not be construed as
a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no
responsibility for any errors that may appear in this document.
Copyright  1993 by Digital Equipment Corporation
All Rights Reserved.
Printed in U.S.A.
The following are trademarks of Digital Equipment Corporation:
DEC
DECbridge
DECconcentrator

DECconnect
DECdirect
DECelms
DECmcc

TK
ULTRIX
VAX
VMS

IBM is a registered trademark of International Business Machines Incorporated.
ST is a registered trademark of American Telephone and Telegraph.

This manual was produced by Telecommunications and Networks Publications.

Contents
Safety

Preface

Multimode Option Cards
1.1
1.1.1
1.1.2
1.2
1.3

Network Management Cards . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optical Bypass Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Management Card Dual Switch . . . . . . . . . . . . . . .
Port Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Laser Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1
1–3
1–3
1–5
1–6

Installing the Option Card
2.1
2.2
2.3
2.4
2.5

Checking the Shipment Contents . . . . . . . . . . . . . . . . . . . . . . . .
Disconnecting the Power and Data Cables . . . . . . . . . . . . . . . .
Removing a Blank Panel or a Previously Installed Option Card
Installing an Option Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Optical Bypass Relay . . . . . . . . . . . . . . . . . . . .

2–2
2–3
2–4
2–5
2–7

iii

Verifying the Installation
3.1
3.2
3.3

Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loopback Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Fiber Optic Cables . . . . . . . . . . . . . . . . . . . . . . . . .

Purchasing Multimode Fiber Optic System Cables
A.1
A.2

Multimode Fiber Optic System . . . . . . . . . . . . . . . . . . . . . . . . .
Multimode Fiber Optic Cabling . . . . . . . . . . . . . . . . . . . . . . . . .

DECconcentrator 500 Unit Identification List

Related Documents
Additional Networking Documentation . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1
3–3
3–6

A–1
A–2

C–2

Part Numbers for Software Updates

Glossary

Index

Figures
1–1
1–2
1–3
1–4
2–1

Multimode Network Management Card . . . . . . . . . . . . . . . . . .
Multimode Network Management Card Dual Switch . . . . . . . .
Types of Network Management Card Switches . . . . . . . . . . . . .
Multimode Port Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the Contents of Your Shipment . . . . . . . . . . . . . . . . .

1–2
1–3
1–4
1–5
2–2

2–2
2–3
3–1
3–2
3–3
3–4
3–5
3–6
B–1

Removing a Blank Panel or a Previously Installed Option Card
Installing Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ANSI MIC Loopback Connection . . . . . . . . . . . . . . . . . . . . . . .
2.5-mm ST-type Loopback Connection . . . . . . . . . . . . . . . . . . .
Port LED Status During Loopback Testing . . . . . . . . . . . . . . . .
ANSI MIC Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LEDs in a Fully Configured DECconcentrator 500 Unit . . . . . .
DECconcentrator 500 Identification List . . . . . . . . . . . . . . . . . .

2–4
2–6
3–4
3–4
3–5
3–6
3–7
3–8
B–2

Network Management Card Switch Settings . . . . . . . . . . . . . . .
Fiber Optic Connector Specification . . . . . . . . . . . . . . . . . . . . .
ANSI Multimode Patch Cables . . . . . . . . . . . . . . . . . . . . . . . . .
Low-Power Multimode Patch Cables . . . . . . . . . . . . . . . . . . . .
Update Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–4
A–2
A–2
A–3
D–1

Tables
1–1
A–1
A–2
A–3
D–1

Safety

Warnings and cautions that appear in this manual are defined as follows:

WARNING

Contains information to prevent personal injury.

CAUTION

Contains information to prevent damage to equipment.

VORSICHT

Enthält Informationen, die beachtet werden müssen, um
den Benutzer vor Schaden zu bewahren.

ACHTUNG

Enthält Informationen, die beachtet werden müssen, um
die Geräte vor Schaden zu bewahren.

DANGER

Signale les informations destinées à prévenir les accidents corporels.

ATTENTION

Signale les informations destinées à prévenir la détérioration du matériel.

AVISO

Contiene información para evitar daños personales.

PRECAUCION

Contiene información para evitar daños al equipo.

vii

The warnings and cautions you must observe for the hardware described in this manual
appear below in English, German, French, and Spanish. The pages on which these safety
messages appear are also listed.

CAUTION

Use a pointed tool to change switch settings. Never use a
pencil; graphite can damage switches. (Page 1-4)

ACHTUNG

Verwenden Sie einen spitzen Gegenstand, z.B. einen
Kugelschreiber, wenn Sie Schaltereinstellungen ändern
wollen. Benutzen Sie dazu keinen Bleistift, da der Graphitabrieb die Schalter beschädigen kann.

ATTENTION

Utilisez un outil pointu pour changer le positionnement
des commutateurs. N’utilisez jamais un crayon, car le
graphite de la mine pourrait endommager les commutateurs.

PRECAUCION

Con cualquier herramienta puntiaguda se cambian los
parámetros de conexión, pero nunca con lápices porque
el grafico daña los interruptores.

Some fiber optic equipment can emit laser light that can injure
your eyes. Never look into an optical fiber or connector port.
Always assume the cable is connected to a light source.
(Page 1-6)

WARNING

VORSICHT

Schauen Sie niemals direkt in ein Glasfaserkabel oder ei
nen Glasfaseranschluß. Die Laserstrahlen in faser-optischen Geräten können Augenverletzungen verursachen.

DANGER

Certains équipements utilisant les fibres optiques peuvent
émettre des rayonne-ment laser dangereux pour les yeux.
Ne vous avisez jamais de regarder par l’extrémité d’une
fibre optique ou dans l’ouverture d’un connecteur. Considérez- toujours que le câble est relié à une source lumineuse.

AVISO

Algunos equipos de fibra óptica pueden emitir luz láser que
da ña los ojos. No sedebe mirar en una puerta de conector
o fibra óptica. Siempre se debe suponer que el cable está
conectado a la luz.

viii

CAUTION

Static electricity can damage modules and electronic components. Digital recommends you use a grounded wrist
strap (Digital P/N 29-11762) and grounded work surface
when you handle any modules or internal parts. Do not
remove any option cards from their antistatic bags until
instructed to do so in the installation procedure. (Page 2-1)

ACHTUNG

Module und elektronische Komponenten können durch
elektrostatische Entladungen beschädigt werden. Benutzen Sie immer eine antistatische Gelenkmanschette und
eine geerdete Arbeitsunterlage, wenn Sie am offenen
Gerät arbeiten. Ein Antistatik-Kit ist in der BRD bei
DECdirekt unterder Bestellnummer 29-26246 erhältlich.
Entfernen Sie die antistatische Verpackunerst vonErweiterungskarten, wenn Sie in der Installationsanleitung entsprechende Anweisungen sehen.

ATTENTION

Les charges excessives d’électricité statique peuvent
endommager les modules et les composants électroniques. Digital conseille l’utilisation d’un bracelet de masse
et d’un plan de travail mis à la terre (Réf. 29-11762)
lors de la manipulation des modules et des composants
internes. Si vous possédez des cartes en option, ne les
retirez pas de leur housse antistatique avant d’en avoir
reçu l’instruction.

PRECAUCION

La electricidad estática puede dañar los componentes
electrónicos y los módulos. Digital recomienda que se
utilicen cintas de pasadores y superficies detrabajo conectadas a tierra (Digital P/N 29-11762) al trabajar con
cualquiermódulo o parte interna. No sacar de la bolsa
ninguna placa de opciones adicional que pu diera tenerse hasta que se indique en el procedimiento de instalación.

WARNING

To prevent personal injury or equipment damage, DO NOT
insert telecommunications cabling into the optical bypass
relay connector. (Page 2-7)

VORSICHT

Um Personen– oder Geräteschäden zu vermeiden, dürfen
Sie das Telefonkabel AUF KEINEN FALL am Anschluß des
optischen Bypass–Relais anschließen.

DANGER

Pour éviter tout risque d’accident corporel ou de dommage
matériel,NE BRANCHEZ PAS de câble de télécommunication sur le connecteur de relais sélectif optique (optical
bypass relay connector).

AVISO

Para evitar daños personales o al equipo, NO se debe
introducir cableado de telecomunicaciones en el conector
óptico de relés de derivación.

WARNING

To avoid bodily injury or damage to the equipment, do not connect the power cord or any other cable until you are instructed
to do so in these procedures.
Do not apply power to the unit unless all covers are installed.
(Page 3-1)

VORSICHT

SchließenSie das Netzkabel oder andere Kabel erst an,
wenn Sie dazuqaufge fordert werden. Andernfalls besteht
LEBENSGEFAHR! Überdies können die Geräte Schaden
nehmen.
Schließen Sie das Gerät erst an das Stromnetz an, wenn alle
Ab deckungen ord nungsgemäß angebracht worden sind.

DANGER

Afin d’éviter tout risque d’accident corporel ou matériel,
NEBRANCHEZAUCUN cordon d’alimentation ou autre
câble sans en avoir reçu l’instruction explicite dans la procédure.
Ne reliez au secteur qu’après l’installation complète de tous
les capots.

AVISO

Para evitar daños internos al equipo, NO conectar el cable
de alimentación ni ningún otro hasta que se indique en
estos procedimientos.

WARNING

To avoid bodily injury, use care when connecting the
DECconcentrator 500 unit power cord. Regulations in some
countries may require an authorized person to connect the
power cord.
Make sure you connect the power cord to a grounded wall
outlet. (Page 3-1)

VORSICHT

Netzspannung ist lebensgefährlich. Beachten Sie dies,
wenn Sie das Netzkabel anschließen. In einigen Ländern
dürfen Elektrogeräte nur von entsprechend ausgebildetem
Personal, beispielsweise Elektrikern, angeschlossen werden. Prüfen Sie, ob das in Ihrem Land zutrifft.
Schließen Sie das Netzkabel nur an eine geerdete Steckdos
ean.

DANGER

Afin d’éviter tout risque d’accident corporel, agissez avec la
plus grande précaution lors du raccordement du cordon
d’alimentation du concentrateur. Assurez-vous que la
législation vous autorise bien à effectuer ce branchement.
Assurez-vous que la prise sur laquelle vous raccordez le cor
don d’alimentation est effectivement reliée à la terre.

AVISO

Para evitar daños generales, es importante tener cuidado a
la hora de conectar el cable de alimentación del concentrador. En algunos países existen estipula ciones para que la
conexión la tenga que hacer una persona autorizada.
Hay que comprobar que se conecta el cable de alimentación a
una toma conectada a tierra.

xii

WARNING

A safety earth ground wire has been incorporated into this
product through the three-wire plug cap of the ac power cord.
For continued protection against risk of electric shock, this
product must be connected to a three-wire wall receptacle
that has its grounding terminal reliably connected to the building’s safety earth ground. (Page 3-2)

VORSICHT

Das Stromkabel in diesem Gerät ist mit einem Schutzleiter
versehen. Um optimale Sicherheit zu gewährleisten,
dürfen Sie es nur an eine ordnungsgemäß geerdete
Schuko-Steckdose anschließen.

DANGER

Cet équipement est mis à la terre au moyen du fil de terre
ducordon d’alimentation secteur. Afin d’assurer une protection efficace contre tout risque d’électrocution, cet équipement doit être raccordé à une prise secteur équipée
d’un contact de mise à la terre effectivement relié à la terre
secteur du bâtiment.

AVISO

El producto consta de un cable de tierra en el enchufe
trifásico del cable deal imentación. Para evitar el riesgo
continuado de descargas eléctricas, este producto debe
conectarse en una toma de pared trifásica que tenga un
terminal detierracon una conexión fiable a la toma de tierra
del edificio.

CAUTION

Make sure that the bend radius of any fiber optic cable is
7.5 centimeters (3 inches) or greater. (Page 3-6)

ACHTUNG

Der Biegungsradius von faseroptischen Kabeln muß mindestens 7,5 cm betragen.

ATTENTION

Assurez-vous que le rayon de courbure des fibres optiques n’est jamais inférieur à 75 mm.

PRECAUCION

Hay que comprobar que el radio de inclinación de cualquier cable óptico defibra es de es de 7,5 centímetros (3
pulgadas) o mayor.

xiii

Preface

This manual explains how to install the DECconcentrator 500 multimode option
cards into the DECconcentrator 500 unit. The multimode option cards provide longdistance links to the Fiber Distributed Data Interface (FDDI) over multimode fiber.
Intended Audience
This manual is for the hardware installer and system/network manager who are
familiar with fiber optic network technologies, the FDDI ANSI X3T9 standards, and
safety procedures.
Structure of This Manual
This manual has three chapters and four appendixes as follows:
Chapter 1

Provides an overview and physical description of the
DECconcentrator 500 multimode Network Management
Card and the Port Cards.

Chapter 2

Describes how to install the multimode Network
Management Card and the Port Cards.

Chapter 3

Contains the procedures to connect the power and fiber
optic cables. It also describes how to verify the installation
of the multimode Network Management Card and the Port
Cards.

Appendix A

Contains multimode fiber optic system cable purchase
information.

Appendix B

Contains the DECconcentrator 500 unit Identification List.

Appendix C

Lists related documents.

Appendix D

Contains the software microcode update package part
numbers.

Please fill out and return the postage-paid Reader’s Comments form on the last page
of this document to assist us in preparing for future documentation.

xvi

1
Multimode Option Cards

This chapter provides an overview and a physical description of the multimode
option cards. Multimode option cards allow devices that are connected to multimode
fiber to participate in the FDDI network.
There are four multimode option cards: one Network Management Card and three
Port Cards.

1.1 Network Management Cards
Shown in Figure 1–1, the multimode Network Management Card has two FDDI
ports (type A and type B), two switches, and an optical bypass relay connector. The
Network Management Card provides:

• Supports connection to the dual ring and tree’d connection.
• Hardware/firmware remote management
• Downline upgrade capability
• Support of optical bypass to maintain FDDI dual ring integrity

1–1

NOTE
The Network Management Card must be installed in the
top slot of the DECconcentrator 500 unit.
Figure 1–1:

Multimode Network Management Card

Network Management Card
P/N DEFCN-MB
P/N DEFCN-MH

Port A

Dual switch
Hardware address label

Port B

Pins
654 321
Modular jack
(RJ12)

Description

1,2
3,4,6
5

Relay drive; +5V @ 200 mA (max.)
Return; grounded internally
Bypass present; must be externally
grounded to pin 3,4, or 6
LKG–5425–92l

1–2

DECconcentrator 500 Multimode Option Card Installation

1.1.1 Optical Bypass Relay

The Network Management Card has an RJ12 connector that provides signals for an
optical bypass switch. This switch maintains connectivity of the FDDI dual ring in
the absence of power or during fault conditions of a node. The bypass relay allows
the light to bypass the optical receiver in the faulty node, maintaining the operation
of the FDDI ring. Refer to the connector pinout information in Figure 1–1 when
selecting optical bypass devices. For additional optical bypass information, refer to
the Fiber Distributed Data Interface Network Configuration Guidelines manual.
1.1.2 Network Management Card Dual Switch

As shown in Figure 1–2, the Network Management Card has two switches on the
Input/Output (I/O) panel. The switches are used for initialization after option-card
installation. Each switch is a dual-position switch. Figure 1–3 shows the three different types of switches. Refer to Table 1–1 for Network Management Card switch settings.
Figure 1–2:

Multimode Network Management Card Dual Switch

Switch 1 (left switch): resets to factory defaults
Switch 2 (right switch): write enable/disable

Network
Management
Card

DECconcentratorTM 500

Port
Card
Port
Card
LKG–6787–92I

Multimode Option Cards

1–3

Figure 1–3:

Types of Network Management Card Switches

Rocker

Slide
OFF
= Default setting

ON
LKG-4853-92I

CAUTION !
Use a pointed tool to change the switch settings. Never
use a pencil; graphite can damage the switches.

Table 1–1:

Network Management Card Switch Settings

Switch

Factory
Setting

Function

OFF

When set to OFF at power up or restart, no action occurs.

When set to ON at power up or restart, this switch resets any
system parameters that have been altered through remote
management to the default settings.

To reset after the DECconcentrator 500 unit is installed and
operational, do the following:

1. Set the switch to ON.

2. Turn the power on and wait for self-test to complete.

3. Set the switch to OFF.

1–4

OFF

When set to ON, enables write access to system control parameters for network management.

DECconcentrator 500 Multimode Option Card Installation

1.2 Port Cards
Figure 1–4 shows the Multimode Port Cards. Port Cards (P/N DEFCN-HA and
DEFCN-NA) have FDDI-type M ports, no switches, and can connect up to four or
six stations to the DECconcentrator 500 unit. The Low-Power Port Card has four
pairs of ST-type fiber optic ports and no switches. The Low-Power Port Card operates with all FDDI devices. However, it does not meet the full 2-km distance or the
11-dB loss budget requirement of the FDDI standard.
Figure 1–4:

Multimode Port Cards

Port Card
(P/N DEFCN-HA or P/N DEFCN-HF)
Port 2

Port 4
1

Port 1

Port 3

Port 6
3

Port 5

Port Card
(P/N DEFCN-NF or DEFCN–NA or P/N DEFCN–NF)

Port 1

Port 2

Port 3

Port 4

Low Power Port Card
(P/N DEFCN-LA or P/N DEFCN–LF)

Port 1

Port 2

Port 3

Port 4
LKG-7404–92|

Multimode Option Cards

1–5

1.3 Laser Safety Information
WARNING

Some fiber optic equipment can emit laser light that can
injure your eyes. Never look into an optical fiber or connector port. Always assume that the cable is connected
to a light source.

Several of the DECconcentrator 500 option cards (DEFCN-CA, -CF, -DA, -DF,
-EA, -EF, -FA, -FF) use laser sources. The laser sources conform to the Class 1 safety
regulations of the Center for Diseases and Radiological Health (CDRH) of the
United States Department of Health and Human Services, the Public Health Service,
and the Food and Drug Administration. Class 1 laser devices are not considered hazardous.

1–6

DECconcentrator 500 Multimode Option Card Installation

2
Installing the Option Card

This chapter explains the following:

•

Checking the shipment contents

•

Disconnecting the power and data cables

•

Removing a blank panel or a previously installed option card

•

Installing the option card
CAUTION

Static electricity can damage modules and electronic
components. Digital recommends you use a grounded
wrist strap (Digital P/N 29-11762) and a grounded work
surface when you handle modules or internal parts. Do
not remove any option cards from their antistatic bags
until instructed to do so in the installation procedure.
NOTE
The only tool required for installation is a Phillips-head
screwdriver.

If you experience problems with the installation, refer to the problem-solving section of the DECconcentrator 500 Installation manual. Observe all cautions when
you install an option card.

2–1

2.1 Checking the Shipment Contents
Refer to Figure 2–1 to check the contents of your shipment. Do not remove an option
card from its antistatic bag until you are instructed to do so.
In case of damage, contact your shipping agent and Digital sales representative. In
case of missing parts, contact your Digital sales representative.
Figure 2–1:

Checking the Contents of Your Shipment

DECconcentrator 500
Multimode Option Card
Installation manual

Option Card
(Antistatic bag)

ANSI MIC loopback
connector shipped with
P/N DEFCN–MH, DEFCN–NF,
and DEFCN–HA
2.5–mm ST–type loopback
connecotr shipped with
P/N DEFCN–LF
LKG–5040-92I

2–2

DECconcentrator 500 Multimode Option Card Installation

2.2 Disconnecting the Power and Data Cables
NOTE
Adding an option card disrupts network traffic. Digital
recommends that you add an option card when there
will be little or no use of the network.

Remove the power cord and data cables from the DECconcentrator 500 unit
as follows:
1. Disconnect the power cord from the power source.
2. Disconnect any fiber optic cable from the unit that prevents access to the slot
where the option card is to be installed. Note the cable orientation and port
location for each cable you remove.

Installing the Option Card

2–3

2.3 Removing a Blank Panel or a Previously Installed Option Card
To remove a blank panel or a previously installed option card, do the following:
1. Place the antistatic wrist strap around your wrist and attach the other end of
the strap to the DECconcentrator 500 unit chassis.
2. Use a Phillips-head screwdriver to push in and turn the two captive screws
counterclockwise one quarter turn.
3. Unlock the locking levers (see Figure 2–2). Remove the blank panel or option
card.
Figure 2–2:

Removing a Blank Panel or a Previously Installed Option Card

1/4
turn

Locked

Unlocked
LKG–4831-92I

2–4

DECconcentrator 500 Multimode Option Card Installation

2.4 Installing an Option Card
NOTE
Always install the Network Management Card in the
top slot of the DECconcentrator 500 unit.
If you are installing only Port Cards, install a Port Card
in the top slot.

To install an option card, do the following:
1. Attach the antistatic wrist strap around your wrist and attach the other end of
the strap to the DECconcentrator 500 unit chassis.
2. Remove the option card from its antistatic bag. Make sure that the locking
levers on the option card are in the outward (unlocked) position (see
Figure 2–3).
3. Slide the option card into the appropriate slot. Make sure that the sides of the
option card are seated in the guides of the DECconcentrator 500 unit. Push
firmly into place.
4. Lock the option card in place by pushing the levers inward, then turn the two
captive screws clockwise one quarter turn.
NOTE
If the card is a Network Management Card, refer to
Figure 1–2 and Table 1–1 for information about the
card switches. Notify the system/network manager that
you are resetting the network management parameters
to the default setting.

5. Remove the antistatic wrist strap from your wrist and the DECconcentrator
500 unit.
NOTE
To connect the optical bypass relay, refer to Section
2.5.

Installing the Option Card

2–5

Figure 2–3:

Installing Option Cards

Unlocked

Locked

1/4 turn

LKG-6790-92I

2–6

DECconcentrator 500 Multimode Option Card Installation

2.5 Connecting the Optical Bypass Relay
To connect the cables, do the following:
NOTE
The power to the DECconcentrator 500 must be off
when connecting or disconnecting the optical bypass
connector.

1. Pull the protective cap or rubber boot from the port and fiber optic cable
plug.
WARNING

To prevent personal injury or equipment damage,
DO NOT insert telecommunications cabling into
the optical bypass relay connector.

2. Connect the backbone fiber optic cables to the optical bypass relay unit.
–

Connect the correct Digital ANSI MIC cables to PHY A and to PHY B
on the optical bypass relay unit.

3. Insert the optical bypass relay unit RJ12 cable connector into the Network
Management Card (see Figure 1–1).
4. Connect the optical bypass relay unit fiber optic cables to the appropriate
connectors on the Network Management Card.

Installing the Option Card

2–7

3
Verifying the Installation

This chapter contains the procedures to connect the power and fiber optic cables. It
also explains how to verify the operation of the DECconcentrator 500 unit and the
ports.

3.1 Applying Power
WARNING

To avoid bodily injury or damage to the equipment,
do not connect the power cord or any other cable until
you are instructed to do so in these procedures.
Do not apply power to the unit unless all covers are
installed.
WARNING

To avoid bodily injury, use care when connecting the
DECconcentrator 500 unit power cord. Regulations in
some countries may require an authorized person to
connect the power.
Make sure you connect the power cord to a grounded
wall outlet.

3–1

To verify the DECconcentrator 500 unit option card installation, do the following:
WARNING

A safety earth ground wire has been incorporated into
this product through the three-wire plug cap of the ac
power cord. For continued protection against risk of
electric shock, this product must be connected to a
three-wire wall receptacle that has its grounding terminal reliably connected to the building’s safety earth
ground.
NOTE
If you installed a Network Management Card, go to
step 1. If you installed a Port Card, go to step 2.

1. Set switch 1 on the Network Management Card to the ON position (refer to
Figure 1–3). If you are using the optical bypass relay, ensure that it is correctly connected (refer to Section 2.5).
2. Plug the power cord into the DECconcentrator 500 unit first and then into the
wall outlet. This applies power to the DECconcentrator 500 unit and starts the
self-test. Refer to the self-test section in the DECconcentrator 500 Installation manual.
After the self-test is complete, the port Light Emitting Diodes (LEDs) blink
green. If the LEDs are not blinking green, refer to the problem-solving section in
the DECconcentrator 500 Installation manual.
3. Set switch 1 to OFF (if a Network Management Card was installed).
4. Set switch 2 to ON for network management; otherwise, leave switch 2 set to
OFF.

3–2

DECconcentrator 500 Multimode Option Card Installation

3.2 Loopback Testing
The loopback test determines whether the DECconcentrator 500 Network Management Card or Port Card is faulty. This test can also determine whether there is a problem with the cable or the device at the end of the cable. The port LED should be
blinking green before you start the loopback test.
To perform the loopback test, do the following:
1. Remove the protective cap from the multimode port to be tested.
NOTE
To avoid additional optical power loss, do not touch
the fiber ends. Always replace protective caps when
the fiber is not connected.

2. Connect the loopback connector to the port to be tested. Refer to Figure 3–1
(for ANSI MIC) and to Figure 3–2 (for 2.5-mm ST-type).
NOTE
Perform the loopback test on one port at a time. Do not
connect loopback connectors to more than one port at a
time.

Verifying the Installation

3–3

Figure 3–1:

ANSI MIC Loopback Connection

ANSI MIC loopback connector
LKG-7445-92I

Figure 3–2:

2.5-mm ST-type Loopback Connection

2.5-mm ST-type loopback connector
LKG-7446-92I

3–4

DECconcentrator 500 Multimode Option Card Installation

After loopback connection, the port LED blinks red, indicating successful completion of the loopback test. Figure 3–3 shows the LEDs for the loopback connection to
port A. If the LEDs do not match those in Figure 3–3, refer to the problem-solving
section in the DECconcentrator 500 Installation manual.
3. Remove the loopback connector. The port LED blinks green again.
Figure 3–3:

Port LED Status During Loopback Testing

Controller/
backplane
Fan
LED
LED

= OFF
= ON (Green only; on solid )
= ON (Green only; blinking)

Power
LED

= ON (Red only; blinking)

DECconcentratorTM 500

Card
Fault
LED

Port A
LED

Port
B
LED

Ring
Operational
LED

Network Management Card LEDs

Card
Fault
LED

Port 1
LED

Port 2 Port 3
LED
LED

Port 4
LED

Port 5
LED

Port 6
LED

Port Cards LEDs
LKG-6792-92I

Verifying the Installation

3–5

3.3 Connecting Fiber Optic Cables
Refer to the Fiber Distributed Data Interface Network Configuration Guidelines
manual for multimode fiber cable specifications.
CAUTION

Make sure that the bend radius of any fiber optic
cable is 7.5 centimeters (3 inches) or greater.
Steps 1 through 3 describe how to connect the fiber optic cables. (Refer to Section 2.5
for optical bypass relay cable connection.) Figure 3–4 shows keying the ANSI MIC
connector.
NOTE
To avoid additional optical power loss, do not touch
the fiber ends. Always replace protective caps when
the fiber is not connected.
Figure 3–4:

ANSI MIC Keying

Receptacle keying
A

Plug keying
A

Receptacle
keying

Inserts
into
A Only
B Only

Plug keying

Inserts
into
M Only
A,B,M,
or S
LKG–5012-92I

To connect the cables, do the following:
1. Pull the protective cap or rubber boot from the port and fiber optic cable
plug.
2. Connect the fiber optic cable to the appropriate connector (see Figure 3–5).
Observe the LEDs after you connect the fiber optic cables (see Figure 3–6).
3. For each cable connected to the DECconcentrator, add the cable identification number to the DECconcentrator 500 Identification List in Appendix
NO TAG.

3–6

DECconcentrator 500 Multimode Option Card Installation

Figure 3–5:

Connecting the Cables

ANSI MIC keyed cable and connector

2.5-mm ST-type cable and connector
LKG-4370-91l

Verifying the Installation

3–7

Figure 3–6:

LEDs in a Fully Configured DECconcentrator 500 Unit

Controller/
backplane
Fan
LED
LED

= OFF
= ON (Green only)
= ON (Green only; blinking)

Power
LED

DECconcentratorTM 500

Card
Fault
LED

Port A
LED

Port B Ring
LED
Operational
LED

Card
Fault
LED

Port 1
LED

Port 2 Port 3
LED
LED

Network Management Card LEDs

Port 4
LED

Port 5
LED

Port 6
LED

Port Card LEDs
LKG-6795-92I

NOTE
Figure 3–6 assumes that all ports are connected to
active stations.

3–8

DECconcentrator 500 Multimode Option Card Installation

A
Purchasing Multimode Fiber
Optic System Cables

This appendix contains information about purchasing multimode fiber optic system
cables.
NOTE
Verify that the installation site meets the physical, environmental, power, and cabling requirements for the
DECconcentrator 500 unit. Check the cable plant logbook entry for the cable plant certification.

A.1 Multimode Fiber Optic System
The multimode option cards use ANSI-compliant and low-power optical transmission systems. The optical transmissions differ by the total distance and loss budgets
supported. The ANSI option card uses the ANSI FDDI MIC connector and the lowpower option card uses the 2.5-mm ST-type connector. Refer to the Fiber Distributed Data Interface Network Configuration Guidelines manual for multimode fiber
optic system specifications.

A–1

Table A–1 lists the fiber optic connector attenuation specifications.
Table A–1:

Fiber Optic Connector Specification

Connector

Attenuation

ANSI FDDI MIC

Maximum attenuation not directly
specified by ANSI X3T9

ST-type 2.5-mm (0.10 in)

Maximum attenuation less than 0.7 dB

A.2 Multimode Fiber Optic Cabling
The multimode option cards use a 1300-nm optical system with multimode fiber.
Digital recommends using 62.5/125 Graded Index Multimode Optical Fiber. The
fiber must conform to Digital general specification 1710003-GS.
Digital recommends using the patch cables listed in Table A–2 for connection of
FDDI-to-FDDI and FDDI-to-2.5-mm ST-type.
Table A–2:

A–2

ANSI Multimode Patch Cables

Cable Length

FDDI-to-FDDI
Digital P/N

FDDI-to-2.5 mm ST-type
Digital P/N

1 m (3.3 ft)

BN24B-01

BN24D-01

3 m (9.8 ft)

BN24B-03

BN24D-03

4.5 m (14.8 ft)

BN24B-4E

BN24D-4E

10 m (32.8 ft)

BN24B-10

BN24D-10

20 m (65.6 ft)

BN24B-20

BN24D-20

30 m (98.4 ft)

BN24B-30

BN24D-30

DECconcentrator 500 Multimode Option Card Installation

Digital recommends you use the patch cables listed in Table A–3 for low-power
multimode connection.
Table A–3:

Low-Power Multimode Patch Cables

Cable Length

2.5 mm ST-type-to-2.5 mm ST-type
Digital P/N

1 m (3.3 ft)

BN24E-01

3 m (9.8 ft)

BN24E-03

4.5 m (14.9 ft)

BN24E-4E

10 m (32.8 ft)

BN24E-10

20 m (65.6 ft)

BN24E-20

30 m (98.4 ft)

BN24E-30

Multimode Fiber Optic System Information and Cable Purchase Information

A–3

B
DECconcentrator 500 Unit
Identification List

Use the DECconcentrator 500 Identification List to record the following information:

•

DECconcentrator 500 model number

•

DECconcentrator 500 serial number

•

Network Management Card

•

–

Cable ID number

–

Hardware address

–

Ports used

–

Switch 1 setting

–

Switch 2 setting

Port Card
–

Ports used

–

Cable ID number

Fill in the DECconcentrator 500 Identification List (see Figure B–1) and give a copy
to the system/network manager.

B–1

Figure B–1: DECconcentrator 500 Identification List

DECconcentrator 500 Model Number
DECconcentrator 500 Serial Number
Network Management Card: Hardware address
Network Management Card: switch 1 setting
Network Management Card: switch 2 setting
Network Management Card: ports used
Port A cable ID number
Port B cable ID number
First Port Card: ports used
Port 1 cable ID number
Port 2 cable ID number
Port 3 cable ID number
Port 4 cable ID number
Port 5 cable ID number
Port 6 cable ID number
Second Port Card: ports used
Port 1 cable ID number
Port 2 cable ID number
Port 3 cable ID number
Port 4 cable ID number
Port 5 cable ID number
Port 6 cable ID number
Third Port Card: ports used
Port 1 cable ID number
Port 2 cable ID number
Port 3 cable ID number
Port 4 cable ID number
Port 5 cable ID number
Port 6 cable ID number

B–2

DECconcentrator 500 Multimode Option Card Installation

C
Related Documents

The following documents contain additional information. Refer to the back of this
manual for ordering information.

•

DECconcentrator 500 Problem Solving (Order No. EK-DEFCN-PS)
This manual describes isolating DECconcentrator 500 faults to the field-replaceable unit (FRU) and removing and replacing each FRU. This is a field
problem-solving manual.

•

DECconnect System Fiber Optic Planning and Configuration
(Order No. EK-DECSY-FP)
This manual describes the planning requirements, product information, and
guidelines for configuring DECconnect System Fiber Optic Networks that
use the DECconnect System fiber optic products.

•

DECconnect System Fiber Optic Installation (Order No. EK-DECSY-FI)
This manual describes how to install a DECconnect System fiber optic cable
plant.

•

POLYCENTER Framework and Application Planning and Installation for
VMS (Order No. AA-PD58D-TE)
This manual describes how to plan for and install DECmcc on the VMS
operating system.

C–1

•

POLYCENTER Framework and Application Planning and Installation for
ULTRIX (Order No. AA-PH0WB-TE)
This manual describes how to plan for and install DECmcc on the ULTRIX
operating system.

•

POLYCENTER Framework and Application Concentrator Access Module
Use (Order No. AA-PH31C-TE)
This manual describes the DECconcentrator 500 entity model, entity management, and the directives necessary to perform typical management operations.

•

Fiber Distributed Data Interface Network Configuration Guidelines
(Order No. EK-DFDDI-CG)
This manual describes the guidelines for connecting devices to an FDDI network. It also includes network configuration examples.

•

Fiber Distributed Data Interface System Level Description
(Order No. EK-DFSLD-SD)
This manual describes the FDDI system, how it works, and the role of the
individual components.

Additional Networking Documentation
Refer to the Network Management Software documentation specific to your network product. Also refer to the following documents for additional information.

•

Networks and Communications Product Documentation
(Order No. EK-NACPD-RE)
This manual lists the title and order number for each publication associated
with Digital Equipment Corporation’s Networks and Communications products.

•

Networks Buyer’s Guide
This guide describes Digital’s networking products. Contact your local sales
office to receive a copy.

C–2

DECconcentrator 500 Multimode Option Card Installation

D
Part Numbers for Software Updates

Digital Equipment Corporation plans periodic software microcode updates. Contact
your sales representative or see the Networks Buyer’s Guide to find out whether new
software microcode is available. The following table lists the update packages, media,
and part numbers for the updates.
Table D–1: Update Packages
Microcode and Media

Digital Part
Number

FDDI DECconcentrator 500 Software Update Package
for VMS, 16MT9

QB-YX2A9-AA

FDDI DECconcentrator 500 Software Update Package
for VMS, TK50

QB-YX2A9-AB

FDDI DECconcentrator 500 Software Update Package
for ULTRIX/VAX, 16MT9

QB-YX2A9-AC

FDDI DECconcentrator 500 Software Update Package
for ULTRIX/VAX, TK50

QB-YX2A9-AD

FDDI DECconcentrator 500 Software Update Package
for ULTRIX/RISC, 16MT9

QB-YX2A8-AE

FDDI DECconcentrator 500 Software Update Package
for ULTRIX/RISC, TK50

QB-YX2A8-AF

FDDI DECconcentrator 500 Software Update Package
for MS-DOS, 720-KB diskette

QB-YX2A8-AG

D–1

Glossary
American National Standards Institute (ANSI)

An organization that compiles and publishes computer industry standards.
ANSI

See American National Standards Institute.
attenuation

Magnitude of optical power loss usually expressed in units of decibels (dB).
DECconcentrator

An FDDI node that provides additional attachment points for stations that are not
part of the dual ring, or for other concentrators in a tree structure. A concentrator has
two Physical Layer entities and may have one or more Data Link layer entities. The
concentrator is the focal point of Digital’s dual ring of trees.
configuration switch

The switches located on the Network Management Card handle. Switch 1 is used to
enable/disable the reset to default parameters function (active only during initialization). Switch 2 is used to enable/disable remote write access.
Fiber Distributed Data Interface (FDDI)

A set of ANSI/ISO standards that define a high-bandwidth (100-Mb/s) general-purpose local area network connection between computers and peripheral equipment in
a timed-token passing, dual ring of trees configuration.
ANSI Media Interface Connector (MIC)

A category of connectors that meet the ANSI PMD standard and are used to connect
single attachment stations, dual attachment stations, and DECconcentrator 500 units
to an FDDI network. Type A and B connectors are used to connect a DECconcentrator 500 unit to the dual ring. Type M and S connectors are used to connect DECconcentrator 500 units and single attachment stations.

Glossary–1

FDDI connector

See ANSI Media Interface Connector.
FDDI network

A fiber optic network that meets the ANSI X3T9 standard. A counter rotating timedtoken dual ring network operating at a bandwidth of 100 Mb/s.
fiber

Dielectric that guides light; waveguide.
fiber optic cable

A transmission medium designed to transport signals in the form of pulses of light.
fiber optics

A technology whereby signals are transmitted over an optical waveguide medium
through the use of light-generating transmitters and light-detecting receivers.
LASER

Light Amplification by Stimulated Emission of Radiation. Predominantly used for
transmission over single-mode cable systems.
LED

Light emitting diode.
microcode

Software code that includes an internal program that controls the execution of computer instructions.
Network Management Card

An option card for the DECconcentrator 500 unit that provides for the connection to
the dual ring and the hardware/firmware to allow remote management. A multimode
Network Management Card has two ports and two switches.
optical receiver

An optoelectronic circuit that converts an incoming optical signal to an electronic
logical signal.
optical transmitter

An optoelectronic circuit that converts an outgoing electronic logical signal to an
optical signal.
Port Card

An option card for the DECconcentrator 500 unit that provides for the connection of
stations to the DECconcentrator 500 unit. The multimode Port Card conforms to the
ANSI X3T9 standard.

Glossary–2

Index
A
ANSI MIC cable connectors, 3–7
ANSI MIC cable loopback connector,
3–4
ANSI MIC keying, 3–6

disconnecting power and cables, 2–3
fully configured, 3–8
identification list, B–1, B–2
self–test, 3–2
Dual switch
description, 1–3
settings, 1–4
types, 1–4

Bend radius, 3–6

F
C
Cable plant certification, A–1
Connecting fiber optic cables
bend radius, 3–6
procedure, 3–6
Connecting the cables, 3–6, 3–7

Fiber optic cables, 3–6
Fiber optic system
attenuation, A–2
patch cables, A–2
Fiber optic system information, A–1

DECconcentrator 500
applying power, 3–1, 3–2

Installation verification, 3–2
Installing the option card, 2–5

Index–1

L
Laser safety information, 1–6
Loopback connectors
2.5-mm ST-type, 3–4
ANSI MIC, 3–4
Loopback test, 3–3, 3–4
LED status before loopback test, 3–3
LED status during loopback test, 3–5
Low-power patch cables, A–3

M
Multimode option card description, 1–1

Optical bypass relay description, 1–3

P
Patch cables, A–2
Port Card
description, 1–5
identification, 1–5
installation, 2–5, 2–6
installation verification, 3–2
removing blank panels or option cards,
2–4

Network Management Card
description, 1–1
dual switch, 1–3
dual switch positions, 1–4
dual switch settings, 1–4
identification, 1–2
installation, 2–5, 2–6
installation verification, 3–2
optical bypass relay, 1–3
removing blank panels or option cards,
2–4

Related documents, C–1
Removing blank panels or option cards,
2–4

O
Optical bypass relay connection, 2–7

Index–2

S
Safety information, 1–6
Shipment contents, 2–2
Site specifications, A–1
Software Microcode Update, part numbers, D–1
ST-type cable connectors, 3–7
ST-type loopback connectors, 3–4
Static electricity, 2–1

HOW TO ORDER ADDITIONAL DOCUMENTATION
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In Continental USA
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(1-800-344-4825)

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call 1-800-267-6215

In New Hampshire,
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call 1-603-884-6660

ELECTRONIC ORDERS (U.S. ONLY)
Dial 800-dec-demo with any VT100 or VT200
compatible terminal and a 1200-baud modem.
If you need assistance, call 1-800-DIGITAL (1-800-344-4825)

DIRECT MAIL ORDERS (U.S. and Puerto Rico*)
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P.O. Box CS2008
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DIRECT MAIL ORDERS (Canada)
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940 Belfast Road
Ottawa, Ontario, Canada K1G 4C2
Attn: A&SG Business Manager

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DIGITAL EQUIPMENT CORPORATION
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c/o Digital’s local subsidiary
or approved distributor

Internal orders should be placed through Publishing and Circulation Services (P&CS),
Digital Equipment Corporation, 444 Whitney Street, NRO2, Northboro, Massachusetts 01532-2597
*Any prepaid order from Puerto Rico must be placed
with the Local Digital Subsidiary:
1-809-754-7575

DECconcentrator 500 Multimode Option Card Installation
EK-DEFCN-MM. C01

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