Digital Equipment DECrepeater 90FS Operating and maintenance instructions

DECrepeater 90FS
Installation and Configuration
Part Number: EK–DEFMI–IN. A01
August 1994
This manual describes how to install and configure the
DECrepeater 90FS module.
Revision/Update Information: This is a new manual.

Copyright
August 1994
The information in this document is subject to change without notice and should not be construed as a
commitmentbyDigitalEquipmentCorporation.DigitalEquipmentCorporationassumesnoresponsibilityforany
errors that may appear in this document.
Copyright 1994 by Digital Equipment Corporation.
All rights reserved. Printed in U.S.A.
The postage-paid Reader’s Comments form at the back of this document requests your evaluation of this
document to assist us in preparing future documentation.
The following are trademarks of Digital Equipment Corporation: DEC, DECconnect, DEChub, DEChub ONE,
DECndu, DECndu Plus, DECrepeater, Digital, HUBwatch, MultiSwitch, OpenVMS, ThinWire, ULTRIX, VAX,
VMS, and the DIGITAL logo.
MS-DOS is a registered trademark of Microsoft Corporation.
ST is a registered trademark of American Telephone and Telegraph Company.
FCC NOTICE —Class A Computing Device:
Thisequipmentgenerates,uses,andmayemitradiofrequencyenergy.Theequipmenthasbeentypetestedand
found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC Rules,
whicharedesignedtoprovidereasonableprotectionagainstsuchradiofrequencyinterferencewhenoperatedin
acommercial 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.
VCCI NOTICE —Class 1 Computing Device:
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
EquipmentandElectronicOfficeMachinesaimedatpreventingradiointerferenceincommercialand/orindustrial
areas. Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be
caused to radios and TV receivers.
Read the instructions for correct handling.
CE NOTICE – Class A Computing Device:
Warning!
ThisisaClassAproduct. Inadomesticenvironmentthisproductmaycauseradiointerference,inwhichcasethe
user may be required to take adequate measures.
Achtung!
Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses Gerätes
Rundfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende Gegenmaßnahmen
verantwortlich ist.
Attention!
CeciestunproduitdeClasseA. Dans un environment domestique, ce produit risque de créer des interférences
radioélectriques, il appartiendra alors à l’utilisateur de prendre les mesures spécifiques appropriées.

iii
Contents
Safety
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back Panel 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Module 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Module as a Standalone Unit 5. . . . . . . . . . . . . . . . . . . . . . . .
Removing the Back Cover 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Module into a DEChub 900 9. . . . . . . . . . . . . . . . . . . . . . . . .
Installing the Module into a DEChub 90 11. . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Cables 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Module 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring the Module 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup Port Description 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setup Port Device Cabling 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessing the Setup Port 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Start Redirect Mode 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DECrepeater 90FS Installation Menu (DEChub 90/Standalone Options) 22
DECrepeater 90FS Installation Menu (DEChub 900 Options) 23. . . . . . . . .
Description of Menu Options 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Descriptions 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Problem Solving Using the LEDs 48. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal Powerup 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector Pin Assignments 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUI (15-pin D-Sub) Connector 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Port (8-pin MJ) Connector 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8571-J Adapter 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8575-A Adapter 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv
Contents (Cont.)
H8585-AC Adapter 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8584-AA Adapter 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H8585-AA Adapter 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Redundant Fiber-Optic Link Configuration 55.. . . . . . . . . . . . . . . . .
Redundant Fiber-Optic Link Overview 55. . . . . . . . . . . . . . . . . . . . . . . . . . .
Redundant Fiber-Optic Link Components 55. . . . . . . . . . . . . . . . . . . . . . . . .
Redundant Fiber-Optic Link Operation 57. . . . . . . . . . . . . . . . . . . . . . . . . .
Simple Redundant Link Configuration 58. . . . . . . . . . . . . . . . . . . . . . . . . . .
Complex Redundant Link Configuration 59. . . . . . . . . . . . . . . . . . . . . . . . .
Partial Fault Detection 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Full Fault Detection 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommendations for Redundant-Link Configuration 62. . . . . . . . . . . . . . .
Fiber-Optic Loss Budget 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10BaseFL Loss Budget 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOIRL Compatibility 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Specifications 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Associated Documents 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1 DLU Process Description 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Module LED States 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Problem Solving Using the LEDs 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Partial Fault Detection Versus Full Fault Detection 62. . . . . . . . . . . . . . .
5 10BaseFL Worst-Case Loss Budget 63. . . . . . . . . . . . . . . . . . . . . . . . . . .
6 FOIRL Worst-Case Loss Budget 64. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 DECrepeater 90FS Best-Case Maximum Launch Power 65. . . . . . . . . . .
8 Operating Specifications 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Acoustical Specifications 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

v
Safety !
Any warning or caution that appears in this manual is 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 acci-
dents corporels.
ATTENTION Signale les informations destinées à prévenir la détério-
ration du matériel.
AVISO Contiene información para evitar daños personales.
PRECAUCION Contiene información para evitar daños al equipo.

vi
Safety !(Cont.)
The cautions that must be observed for the hardware described in this manual are
listed below in English, German, French, and Spanish. The pages on which these
safety messages appear are also listed.
WARNING !Somefiberopticequipmentcanemitlaserorinfraredlightthat
can injure your eyes. Never look into an optical fiber or con-
nector port. Always assume the cable is connected to a light
source. [Pages 14 and 16.]
VORSICHT Bestimmte Lichtleitergeräte können für die Augen
gefährliches Laser– oder Infrarotlicht abstrahlen. Vermeiden
Sie es daher unter allen Umständen, direkt in ein Lichtleiter-
kabel oder einen Lichtleiteranschluß zu schauen. Gehen
Sie immer davon aus, daß Lichtleiterkabel mit einer Licht-
quelle verbunden sind.
DANGER Certains équipements à fibre optique peuvent émettre un
rayonnement laser ou infra–rouge pouvant provoquer des
troubles oculaires. Ne regardez jamais à l’intérieur d’une
fibre optique ou d’un port de connecteur. Considérez que le
câble est connecté en permanence à une source lumi-
neuse.
AVISO Ciertos equipos de fibras ópticas pueden emitir luz lasérica
oinfrarroja con riesgos de lesiones en los ojos. No se debe
nunca mirar en una fibra óptica o una puerta de conexión.
Siempre hay que suponer que el cable está conectado a
una fuente luminosa.

vii
Safety !(Cont.)
CAUTION !This action deletes all configured settings and replaces
them with factory default values. All configuration settings
will be lost. [Page 25.]
ACHTUNG Bei diesem Vorgang werden alle Konfigurationseinstel-
lungen gelöscht und die Werkseinstellungen wieder ein-
gesetzt. Alle Konfigurationsdaten gehen verloren.
ATTENTION Cette action supprime tous les paramètres de configura-
tion et les remplace par des valeurs prédéfinies. Tous
les paramètres de configuration seront perdus.
PRECAUCION Esta intervención borrará todos los parámetros de confi-
guración y los sustituirá por valores por defecto definidos
de fábrica. Se perderán todos los parámetros de configu-
ración.

viii
Safety !(Cont.)
CAUTION !If power is interrupted during Stage 3 of the DLU process,
the firmware image can become corrupted. Do not turn off
power to the unit or perform any action that can cause the
unit to lose power during Stage 3 of the DLU process.
[Pages 34, 36, and 39.]
ACHTUNG Sollte während der Phase 3 des DLU–Prozesses eine
Unterbrechung der Stromversorgung eintreten, kann das
Firmwareprogramm zerstört werden. Aus diesem Grunde
wird dringend empfohlen, Vorkehrungen zu treffen, daß
während der Durchführung dieser Phase 3 die System-
einheit weder ausgeschaltet noch die Stromversorgung
unterbrochen werden kann.
ATTENTION L’image du microprogramme risque d’être corrompue, en
cas de coupure de courant au cours de l’étape 3 du pro-
cessus DLU. Ne mettez pas l’unité hors tension et n’exé-
cutez aucune action risquant d’entraîner une coupure
d’alimentation au cours de cette étape.
PRECAUCION Si se interrumpe el suministro eléctrico durante la Etapa
3del proceso DLU, puede dañarse la imagen del firm-
ware. No se debe apagar la unidad ni realizar ninguna
operación que pueda causar una interrupción del sumi-
nistro de la unidad durante la Etapa 3 del mencionado
proceso.

1DECrepeater 90FS Installation and Configuration
Introduction
TheDECrepeater90FS(alsoreferredtointhismanualasthemodule)isanEthernet
repeaterthatprovidestwoexternal10BaseFLfiber-optic ports and oneexternalAUI
port.
Inthismanual,theterm10BaseFLreferstotheInternationalStandardsOrganization
(ISO) 8802-3/ANSI/IEEE 802.3 fiber-optic local area networks (LAN) standards.
Inthismanual,the termEthernetisDigital’stermfor its product compatibility with the
ISO 8802-3/ANSI/IEEE 802.3 standards and the Ethernet standards for Carrier
Sense Multiple Access with Collision Detection (CSMA/CD) LANs.
To give your workgroup LAN media flexibility and connectivity, the module can be
configured into a DEChub 900 MultiSwitch (also referred to in this manual as the
DEChub 900), into a DEChub 90, or as a standalone unit. One or more (up to eight)
can be installed into a DEChub 900.
When installing the module into a DEChub 900 or in a DEChub 90, the module’s
hot-swap capability allows you to install or remove the module without turning off
power.
ThemoduleprovidesasidepanelThinWireportconnector,usedwhenthemoduleis
installed as a standalone unit. The module provides a ThinWire port connection to
the backplane when the module is installed in a DEChub 900 or a DEChub 90.
The module’s front panel provides two fiber-optic ports that can operate
independently or as a redundant pair, and one attachment unit interface (AUI) port.
The front panel also provides light-emitting-diodes (LEDs) that indicate the status of
the module, the ports, and the network.
The module includes a serial port on the front panel that can be used as an
installationsetupportwhenthemoduleisinstalledintoaDEChub90orinstalledasa
standalone unit. Using the setup menu, you can enable the module’s front panel
serial port for Out-of-Band Management (OBM).
NOTE: When the module is installed in a DEChub 900, you
must use the Hub Manager setup port on the DEChub
900 instead of the module’s setup port.

2DECrepeater 90FS Installation and Configuration
Introduction (Cont.)
Features
Your DECrepeater 90FS module includes the following features:
•ThinWire,10Base2 portavailableasanexternalconnectiononthemoduleside
panel (when the module is installed as a standalone unit) or to the backplane
segment in a DEChub 900 or a DEChub 90.
•BackplaneaccesstoanotherEthernetLANthroughasingleflexiblechannelina
DEChub 900.
•Automatic module self-test at powerup.
•Port-level packet address security.
•In-band Simple Network Management Protocol (SNMP) management.
•OBM using SNMP over Serial Line Internet Protocol (SLIP) provides an addi-
tional path to the normal in-band management as follows:
–Through the OBM connector on the DEChub 900 Hub Manager
–Through the front-panel serial port on the module when the module is
installed into a DEChub 90 as a standalone unit.
•Built-in SNMP agent supports the following management information bases
(MIBs):
–Ethernet-like Interface Type MIB (RFC 1398)
–Internet Engineering Task Force (IETF) Repeater MIB (1516)
–Digital Extended Repeater MIB
–DEChub 900 Public Common MIB
–MIB II (RFC 1213)
•Manageabilityusing any generic SNMP management application that supports
the MIBs listed above.
•Upgradeable device firmware (in nonvolatile Flash memory) using Trivial File
TransferProtocol(TFTP)withDigital’sNetworkDeviceUpgrade(DECndu)Plus
utility or through the setup port with any TFTP server.
•User-friendly advanced Graphical User Interface (GUI) manageability with
Digital’s HUBwatch Network Management Station (NMS) application.

3DECrepeater 90FS Installation and Configuration
Front Panel
1) Power LED — Lights when the module has
5 volts of power.
2) Module OK LED — Lights when the the
module passes self-test.
3) Network Activity LED — Indicates
network traffic level.
4) Network OK LED — Indicates the status
of either the side panel or backplane
ThinWire, 10Base2 port.
5) Redundancy Enabled LED — Lights when the
fiber-optic ports are operating as a redundant pair.
6) Port State LEDs — The LEDs (labeled 1 through
3)showtheattachment statusoftheassociatedport
to a LAN.
7) Port Link LEDs — Light when fiber-optic cables of
the associated port are properly connected to a
functional remote fiber-optic device.
NOTE: Refer to the section titled LED
Descriptions for more information
about LED operation.
8) Ethernet address label — Shows the Ethernet
address of the module.
9) Fiber-optic TX port ST-type connectors —
Connectfiber-opticcablestothereceiveports of the
remote fiber-optic device.
10) Fiber-optic RX port ST-type connectors —
Connect fiber-optic cables to the transmit ports of
the remote fiber-optic device.
11) Ethernet AUI (15-pin D-Sub) port connector —
connects to an external medium attachment unit
(MAU) directly or by using an AUI cable.
12) Serial port (8-pin MJ) connector —Multiplexed
port can be used as a setup port or for OBM.
13) Cooling fan unit —Provides air circulation.
14) ThinWire port connector —Connects through a
BNC T-connector when module is operating as a
standalone unit.
LKG-8817-93I
Side view
2
3
9
9
10
10
11
7
7
13
12
6
1
4
5
8
14

4DECrepeater 90FS Installation and Configuration
Back Panel
1) Locking tab — Locks the module into a
DEChub 900 or DEChub 90 backplane.
2) 48-pin connector — Provides network and
power connections to the module when the
module is installed into a DEChub 900 or a
DEChub 90.
3) Grounding bolt — Provides a chassis
grounding connection to the module when
the module is installed into a DEChub 900 or
a DEChub 90.
4) Power connector — Receives dc current
from the power supply. This feature is used
for standalone operation only.
5) Manufacturing label — Lists the module
part number, serial number, revision level,
and power requirements.
6) Mounting tab — Secures the module to the
backplane when the module is installed into a
DEChub 900 or a DEChub 90.
7) Cooling fan unit — Provides air circulation.
8) Back cover — The back cover is used only
when the module is a standalone unit.
LKG-8881-93I
2
4
5
6
1
3
8
7

5DECrepeater 90FS Installation and Configuration
Installing the Module
You can install the DECrepeater 90FS as a standalone unit, or you can install the
module into a DEChub 900 MultiSwitch or DEChub 90. For installation instructions,
refer to the following table.
If... And... Then...
You are installing the
module as a
standalone unit.
Go to the section titled
Installing the Module as a
Standalone Unit.
You are installing the
module into a
DEChub 900 or a
DEChub 90.
Your module has a
back cover. Go to the section titled Removing the Back Cover.
You are installing the
module into a
DEChub 900.
Your module does not
have a back cover. Go to the section titled Installing the Module into a
DEChub 900.
You are installing the
module into a
DEChub 90.
Your module does not
have a back cover. Go to the section titled Installing the Module into a
DEChub 90.
Installing the Module as a Standalone Unit
You can use the DECrepeater 90FS as a standalone unit by placing it onto a table,
mounting it onto a wall, or installing it into a standard 19-inch rack using a shelf
assembly (Digital Part Number: H9544–MS).

6DECrepeater 90FS Installation and Configuration
Installing the Module
Installing the Module as a Standalone Unit
NOTE: Install the module horizontally to ensure that the fans
have at least 2 inches of clearance.
1Connect the ThinWire
T-connector:
a. Attach the ThinWire T-connec-
tor to the BNC connector and
turn the connector one-quarter
turntotherightuntiltheconnec-
tor locks into place.
b. Attach the ThinWire backbone
segmenttoone oftheBNCcon-
nectors on the T-connector.
c. Install a terminator on the other
end of the T–connector, or con-
nect a ThinWire cable to anoth-
er 10Base2 device.
NOTE: To disconnect the ThinWire
T-connector, turn the connector
one-quarter turn to the left until
the connector clears the BNC
connectorstem,thendisconnect
the cable.
2Connect the power cable.
a. Connect the cable from the
powersupply(DigitalPartNum-
ber: H7827-BA) to the power
connector on the back of the
module.
b. Plug the power supply cable
into the power supply, then into
a wall outlet.
LKG-9174-93I

7DECrepeater 90FS Installation and Configuration
Installing the Module (Cont.)
Installing the Module as a Standalone Unit (Cont.)
3Verify that the module’s Power
LED lights immediately and
thattheModuleOK LEDlights
within 1 minute.
a. The Power LED lights when
power is applied, then the mod-
ule performs a self-test.
b. After the module completes the
self-test, the Module OK
LED lights and remains lit.
NOTE: If the LEDs do not operate as described, refer to the
section titled Problem Solving Using the LEDs.
Go to the section titled Connecting the Cables.
LKG–8820-93I

8DECrepeater 90FS Installation and Configuration
Installing the Module (Cont.)
Removing the Back Cover
Remove the back cover if you are installing a module into a DEChub 900 or into a
DEChub 90.
1Liftupthelatchonthebackcover
by inserting a flat-blade screw-
driverinto the topmountinghole.
2With the latch up, pull the top of
the back cover away, pivoting at
the bottom of the module.
3To install the module:
•Into a DEChub 900, go to the
section titled Installing the Module
into a DEChub 900.
•Into a DEChub 90, go to the
section titled Installing the Module
into a DEChub 90.
LKG-8818-93I

9DECrepeater 90FS Installation and Configuration
Installing the Module (Cont.)
Installing the Module into a DEChub 900
The DECrepeater 90FS hot-swap feature allows you to install the module into the
DEChub 900 without turning off power. Seating the module initiates the powerup
sequence.
1Compare your module’s power
requirements with the values
showninthe HubManagerstatus
display (see examples).
NOTE: The12-voltpowerintheDEChub900isderivedfromthe
15-volt power source.
2Seat the module into the
DEChub 900.
a. Place the module’s mounting
tab into a mounting slot on the
DEChub 900.
b. Pivot the module on the
mounting tab and align the
connectors.
c. Firmlypushthemoduleontothe
backplane connectors until the
release lever clicks.
d. Press down on the release lever
to ensure that it is locked.
Module’s Manufacturing
Label (Example)
If any of the module’s power requirements
exceed the values shown in the status dis-
play, add another power supply (see the
DEChub 900 MultiSwitch Owner’s Manual).
Hub Manager Status
Display (Example)
LKG–9540–94I
Available: 90.5 W
5V: 13.0 A, 15V: 3.5 A
PN A01
AS41601069
C–208/90
REV
SN
FTZ
–DEFMI–M
5Vdc,1.5; 12Vdc, .5A, 15W
LKG–8727-93I
Mounting
tab
Release lever clicks
when module is
seated.

10 DECrepeater 90FS Installation and Configuration
Installing the Module (Cont.)
Installing the Module into a DEChub 900 (Cont.)
3Verify that the module’s Power
LED lights immediately and
Module OK LED lights within
1minute.
a. The Power LED lights when
power is applied, then the mod-
ule performs a self-test.
b. After the module completes
self-test, the Module OK
LED lights and remains lit, then
theHubManager status display
shows:
DECrepeater 90FS
up.
NOTE: If the LEDs do not operate as described, refer to the
section titled Problem Solving Using the LEDs.
Go to the section titled Connecting the Cables.
LKG–9550-94I

11DECrepeater 90FS Installation and Configuration
Installing the Module (Cont.)
Installing the Module into a DEChub 90
The DECrepeater 90FS hot-swap feature allows you to install the module into the
DEChub 90 without turning off power. Seating the module initiates the powerup
sequence. Install the module into slot 7 or 8 only.
NOTE: Ensure that the fans have at least 2 inches of
clearance.
1Install the module into the
DEChub 90.
a. Place the module’s mounting
tab into slot 7 or 8 only on the
DEChub 90. Only slots 7 and 8
provide the 12 volts required by
the DECrepeater 90FS.
b. Pivot the module on the mount-
ing tab and align the connec-
tors.
c. Firmlypushthemoduleontothe
backplane connectors until the
release lever clicks.
d. Pressdownonthereleaselever
to ensure that it is locked. LKG–8837-93I
Mounting
tab
Release lever clicks
when module is
seated.

12 DECrepeater 90FS Installation and Configuration
Installing the Module (Cont.)
Installing the Module into a DEChub 90 (Cont.)
2Verify that the module’s Power
LED lights immediately and
thattheModuleOK LEDlights
within 1 minute.
a. The Power LED lights when
power is applied, then the mod-
ule performs a self-test.
b. After the module completes
self-test, the Module OK
LED lights and remains lit.
NOTE: If the LEDs do not operate as described, refer to the
section titled Problem Solving Using the LEDs.
Go to the section titled Connecting the Cables.
LKG–9550-94I