Digital Equipment DECrepeater 900FL User manual

EK–DTFOR–IN. A01
DECrepeater 900FL
INSTALLATION
PK–02580–IL
DEChub ONE Repeater 900FL DECrepeater 900FL
The DECrepeater 900FL is a Token Ring fiber-optic repeater that operates at a
speed of 4 or 16 Mb/s. It provides conversion between fiber-optic and copper
mediaanditextendstrunkdistancesusingfiber-opticcable.AsamemberofDigi-
tal’s Token Ring product family, it operates in a DEChub 900 MultiSwitch, or as a
standalone unit (DEChub ONE Repeater 900FL).
LKG–9189-94I

FCC NOTICE – Class A Computing Device:
Thisequipmentgenerates,uses,andmayemitradiofrequencyenergy. Theequipmenthasbeentypetestedandfoundtocomplywiththe
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.
The following are trademarks of Digital Equipment Corporation:
            
EK–DTFOR–IN. A01
October 1994
TheinformationinthisdocumentissubjecttochangewithoutnoticeandshouldnotbeconstruedasacommitmentbyDigital
Equipment Corporation. Digital Equipment Corporation assumes no responsibility for any errors that may appear in this
document.
Copyright 1994 by Digital Equipment Corporation
All Rights Reserved.
Printed in U.S.A.
VCCI NOTICE – Class 1 Computing Device:
Thisequipmentisinthe1stClasscategory(informationequipmenttobeusedincommercial and/or industrialareas)andconformstothe
standardssetby theVoluntaryControlCouncil forInterference byDataProcessing Equipmentand Electronic OfficeMachinesaimedat
preventing radio interference in commercial and/or industrial areas.
Consequently,whenusedin aresidentialarea or inanadjacent areathereto,radiointerference maybecaused to radiosandTV receivers,
etc.
Read the instructions for correct handling.
Copyright
2 DECrepeater 900FL
CE NOTICE – Class A Computing Device:
Warning!
Thisis aClass Aproduct. In adomestic environment this product maycause radiointerference, inwhich casethe user may be required
to take adequate measures.
Achtung!
Dieses ist einGerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses Gerätes Rundfunkstörungen auftre-
ten, in welchen Fällen der Benutzer für entsprechende Gegenmaßnahmen verantwortlich ist.
Attention!
Ceci est un produit de Classe A. Dans un environment domestique, ceproduit risque de créer des interférences radioélectriques, il
appartiendraalors à l’utilisateur de prendre les mesures spécifiques appropriées.

1) Power LED. Lights when the repeater has power.
2) Module OK LED. Lights when the repeater passes
self-test.Iftherepeaterfailsself-test,theModuleOK
LED is off.
3) Ring A/B LEDs. In a DEChub 900 MultiSwitch,
when either the A LED or the B LED is on, the
respective A or B ring is active. In a standalone
repeater, both Ring LEDs are always off.
4) Speed LEDs. Either the 16 LED or the 4 LED is on
to show the repeater speed.
5) Fiber-optic Ring In LED. Lights when a fiber-optic
Ring In connection is active.
6) Fiber-opticRingOutLED.Lightswhenafiber-optic
Ring Out connection is active.
7) Speed Switch. Sets speed. Set to 16 when the
network speed is 16 Mb/s. Set to 4 when the
network speed is 4 Mb/s. Network management
cannot override speed switch settings.
8) Fiber-optic Ring In Port. Connects the receive
(Rx) and transmit (Tx) fiber-optic Ring In
port to the fiber-optic Ring Out port of a remote
repeater.
9) Fiber-optic Ring Out Port. Connects the receive
(Rx) and transmit (Tx) fiber-optic Ring Out
port to the fiber-optic Ring In port of a remote
repeater.
10) Reset Switch. Resets all settings, except for the
speed switch setting, to their factory defaults. To
reset while turning on the power, press the reset
switch with a pen or screwdriver.
Front Panel
DECrepeater 900FL 3
2
1
LKG-8970-94I
3
4
5
6
7
8
9
10

Note:
The rear panel shown here is used only when the
repeater is in a single-slot hub configuration.
1 ) Copper Ring In LED. Lights with a Ring In
connection.
2 ) Copper Ring Out LED. Lights with a Ring Out
connection.
3) PowerConnector.Providespowerconnectionforthe
repeater.
4 ) Copper Ring In Connector. Connects Ring In to the
Ring Out connector of a MAU or repeater.
5 ) Copper Ring In Autowrap Switch. Determines
whether the repeater automatically loops back when
it detects a disconnected link on Ring In. If the Ring In
port connects to a device with Digital’s Autowrap, set
the switch to 1 to enable Autowrap. If the Ring In port
connects to a device without Digital’s Autowrap, set
the switch to 0 to disable Autowrap.
6 ) Copper Ring Out Connector. Connects Ring Out to
the Ring In connector of a MAU or repeater.
7 ) Copper Ring Out Autowrap Switch. Determines
whether the repeater automatically loops back when
it detects a disconnected link on Ring Out. If the Ring
Out port connects to a device with Digital’s Autowrap,
set the switch to 1 to enable Autowrap. If the Ring Out
port connects to a device without Digital’s Autowrap,
set the switch to 0 to disable Autowrap.
8 ) Not used. Reserved for out-of-band network
management.
Rear Panel of DEChub ONE Repeater 900FL
4DECrepeater 900FL
LKG-8971-94I
2
1
3
4
5
6
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8


Whenyouinstall arepeaterintheDEChub900MultiSwitch,youdonothavetoturnoffthehubpower.
Remove the rear cover (if necessary).
If you want to install a DEChub ONE Repeater 900FL in a hub,
you need to remove the rear cover.
1
Installing a Repeater in a DEChub 900 MultiSwitch
DECrepeater 900FL 5
Set Speed switch.
2Set the speed switch to 16 when the
network speed is 16 Mb/s or 4 when
the speed is 4 Mb/s.
a. Loosen the screw on the single-slot
hub until it disengages.
b. With one hand holding the front of
the MAU, and your other hand
holding the single-slot hub,
carefully pull the two units apart.
LKG–8972-94I

3
Installing a Repeater in a DEChub 900 MultiSwitch (continued)
6DECrepeater 900FL
Compare your module’s power require-
ments with the values shown in the Hub
Manager status display (see example).
Module’s Manufacturing
Label (Example)
If any of the module’s power ratings exceed
the values shown in the status display, add
another power supply (see the
DEChub 900
MultiSwitch Owner’s Manual).
Hub Manager Status
Display (Example)
LKG–9564–94I
Available: 90.5 W
5V: 13.0 A, 15V: 3.5 A
PN
REV
SN
FTZ
DTFOR–MA
A01
4H41400011
C–208/90 V
5.1 VDC, 1.4A, 7W
4Install the repeater on the hub.
PK–02570–IL
a. Align the repeater’s 48-pin
connector with any available 48-pin
slot in the hub.
b. Place the repeater’s bottom
mounting tab into the mounting slot
on the hub.
c. Pivot the repeater into place. You
hear a click when the repeater is
seated.
d. Press down on the release lever to
ensure that it is locked.
e. With power on in the hub, verify that
the Power, Module OK, and Speed
LEDs are on. If there is traffic on the
network, the Ring A or B LED is
also on.
PK–02570–IL
The release lever is
lifted and clicks
back into place
as the module
is seated.
LKG–8258-93I
Mounting
tab
Note:
Before installing the module in a hub, verify that the
module’s input power rating does not exceed the
available power that the Hub Manager LCD displays.

Connect repeater ports.
5To connect a repeater in a DEChub 900 to a
repeater in an adjacent DEChub 900, or to a
standalone repeater, perform the following
steps:
a. Connecttherepeater’sRing In andRing
Out cables as follows:
From a repeater To adjacent
in a DEChub 900 repeater
Ring In (Rx) Ring Out (Tx)
Ring In (Tx) Ring Out (Rx)
Ring Out (Rx) Ring In (Tx)
Ring Out (Tx) Ring In (Rx)
b. Oncetheringbecomesactive,verifythat
the fiber-optic Ring In and Ring Out
LEDs are on.
Installing a Repeater in a DEChub 900 MultiSwitch (continued)
LKG–8973-94I
DECrepeater 900FL 7

a. Set the Copper Ring In and the Copper
Ring Out Autowrap switches to 1 or 0.
Set the switch to 1 to enable Autowrap
when the Copper Ring In or Copper Ring
OutportconnectstoadevicewithDigital’s
Autowrap, orthe port is not connected to
the network. Otherwise, set the switch to
0 to disable Autowrap.
Mount Repeater (optional).
1
Connect power supply.
3a. Connect the power supply cable to
the power connector.
b. Plug the power supply into a wall
outlet.
SetAutowrap switches.
2
Youcan placetherepeater ona table,mount itona wall,or mountitin astandard 19-inchrack
using a shelf assembly, Digital part number H9544-MS.
Forawallmounting,positiontwoscrews19.7centimeters(7.75inches)apartonthewall.Turn
screws until tight and then back off two turns. Hang the repeater using the keyholes.
Installing a DEChub ONE Repeater 900FL
LKG–8974-94I
To
Power
Supply
Note: The repeater is not manageable in standalone DEChub ONE configuration.
8DECrepeater 900FL


Connect fiber-optic ports.
5
Check LEDs.
4
Withpower on, verify that the Powerand
Module OK LEDs are on.
Connect copper ports.
6
Installing a DEChub ONE Repeater 900FL (continued)
LKG–8976-94I
LKG–8977-94I
a. Connect the repeater’s fiber-optic
Ring In and Ring Out trunk cables as
follows:
From DEChub To adjacent
ONE repeater repeater
Ring In (Rx) Ring Out (Tx)
Ring In (Tx) Ring Out (Rx)
Ring Out (Rx) Ring In (Tx)
Ring Out (Tx) Ring In (Rx)
b. Once the ring becomes active, verify
thatthe fiber-opticRing Inand RingOut
LEDs are on.
a. Connect the repeater’s copper Ring In
and copper Ring Out cables as follows:
From repeater To adjacent MAU
Copper Ring In Ring Out
Copper Ring Out Ring In
b. Once the ring becomes active, verify
that the copper Ring In and Ring Out
LEDs are on.
LKG–9190-94I
DECrepeater 900FL 9

Removing a Repeater from a DEChub 900 MultiSwitch
a. Lift up the release lever on the
hub.
b. Pivot the repeater back on its
bottom mounting tab until it
disengages from the hub.
Note:
When you remove a repeater from the
DEChub 900 MultiSwitch, do not turn off the
hub power.
Remove the repeater from the hub.
1
2
Disconnect the trunk connector cables
from the repeater.
Lift the release lever.
LKG–8978-94I
Mounting
tab
10 DECrepeater 900FL

LED Summary
LED1Off On Flashing
Power No power Power OK N/A
Module OK Self-test failed Self-test OK N/A
or not operating
Speed No power, or Valid speed N/A
(4/16 Mb/s) repeater needs
(See Ring an upgrade.
A/B LEDs.)
Fiber-optic
Ring In/ Inactive Connected to network Continuous single flash: network
Ring Out management disabled port.
Copper
Ring In/ Inactive or Connected to network Continuous single flash: network
Ring Out wire fault management disabled port.
Hub Repeater ONLY:
Ring A/B Not connected Connected to Ring A Continuous single flash: network
or Ring B management disabled port.
A and B alternately flash: repeater needs
an upgrade or an upgrade is in progress.
1Scroll: During powerup self-tests, all LEDs (except for the Power LED) indicate a scrolling pattern.
The LEDs indicate status by being on, off, and flashing. Flashing LEDs indicate special situations.
There is one flashing pattern and a scroll pattern. When an LED indicates a continuous single-flash
pattern, network management has disabled the port. In a scroll pattern, the LEDs turn on and off in a
set order.
DECrepeater 900FL 11

Repeater Cabling
Table 1 lists the maximum distances of 62.5/125 micron multimode fiber optic cable between two
adjacent repeaters.
Table 1 Maximum Fiber Optic Cable Length
Table 2 lists the maximum distances between the repeater’s copper ring in and copper ring out
ports and an adjacent MAU using 100-ohm Unshielded Twisted Pair (UTP) cable.
Table 2 Maximum UTP 100-Ohm Cable Length1
1All distances include patch cables and hub connections.
100-Ohm UTP Cable
Speed Level 3 Level 5
4 Mb/s 150 m (491 ft) 213 m (697 ft)
16 Mb/s 60 m (196 ft) 100 m (327 ft)
Speed Fiber–optic Cable
4 Mb/s 2 kilometers
16 Mb/s 2 kilometers
12 DECrepeater 900FL

Problem Solving
If ... Then ... Do This ...
DEChub 900 MultiSwitch and DEChub ONE
Power LED is off. Repeater does not have Verify that outlet has power.
power. Check power connection to
repeater.
Replace power supply.
Replace repeater.
Module OK LED is off. Repeater failed self-test. Replace repeater.
Ring A and B LEDs alternately Repeater needs an upgrade If you have network management,
flash. or an upgrade is in progress. do a downline load;
otherwise, replace repeater.
Wait for upgrade to complete.
Fiber-optic Ring In or Ring Out Network management To change settings, you can use
LED has single flash pattern. disconnected the repeater’s network management commands
fiber-optic RI or RO port. or the repeater’s reset switch.
Repeater does not make a Fiber-optic ports are not Use a Digital fiber-optic repeater
fiber-optic connection to compatible with non-Digital to make connections.
non-Digital equipment. devices.
DECrepeater 900FL 13


Problem Solving (continued)
If ... Then ... Do This ...
DEChub 900 MultiSwitch ONLY
Ring In, Ring Out, and Ring Network management has To change settings, you can use
A/B LEDs flash together. disabled repeater. network management commands
or the repeater’s reset switch.
Repeater does not connect to Network management will not Check speed and hub
the hub. connect repeater to hub. settings for incorrect network
management overrides.
Repeater does not work DEChub 90 only supports A DEChub 900 MultiSwitch
in a DEChub 90. Ethernet networks. supports Token Ring networks.
DEChub ONE ONLY
Vendor’s MAU or repeater Vendor’s unit is incompatible Set Autowrap switches to 0 on the
causes loopback on ring. with Digital’s Autowrap. DECmauorDECrepeateradjacent
to the vendor’s unit.
Network crashes when a Vendor’s unit does not have Set Autowrap switches to 1 on the
MAU or repeater fails. Digital’s Autowrap. DECmauorDECrepeateradjacent
to the failed unit.
14 DECrepeater 900FL

Product Specifications
DECrepeater 900FL 15
This table provides operating specifications for the DECrepeater 90FL module. Note the
additionalparameters(listed inthetable)toconsider whenthemoduleisinstalled asastandalone
unit.
Operating Specifications
Parameter Specification
Operating Temperature1
Relative Humidity
Altitude
Power – in a DEChub 900
Power – in a standalone DEChub ONE
with the back cover installed.
5oC to 50oC (41oF to 122oF)
10% to 95% noncondensing
Sea level to 4900 m (16,000 ft)
7.0 W, total power
1.4 A, 5Vdc
0.0 A, 12Vdc
7.0 W, total power
1.4 A, 5Vdc
0.0 A, 12Vdc
Connectors
2 fiber-optic (ST-type)
2 fiber-optic (ST-type), 2 8-pin MJ
Physical
Height
Width
Depth
Weight
27.3 cm (10.8 in)
3.2 cm (1.2 in)
11.2 cm (4.4 in); 17.0 cm (6.7 in)
when installed as a standalone unit.
0.56kg (1.25 lb); 0.81kg (1.8 lb)
when installed as a standalone unit.
Certification
CE, CSA, FCC, TÜV, UL, VCCI
1For sites above 4900 m (16,000 ft), decrease the operating temperature specification
by 1.8°C for each 1000 m or 3.2°F for each 3200 ft.
In a DEChub 900
In a standalone DEChub ONE
Operating Environment

Product Specifications
16 DECrepeater 900FL
This table provides acoustical specifications for the DECrepeater 900FL module.
Acoustical Specifications
Acoustics – Declared values per ISO 9296 and ISO 77791
Sound Pressure Level
LpAm, dBA
(bystander positions)
Sound Power Level
LWAd, B
Product
Idle/Operate Idle/Operate
DTFOR + H7082–AB
DTFOR No acoustic noise
No acoustic noise
No acoustic noise
No acoustic noise
Schallemissionswerte — Werteangaben nach ISO 9296 und ISO 7779/DIN EN277792
DTFOR + H7082–AB
DTFOR
Produkt Schalleistungspegel
LWAd, B
Schalldruckpegel
LpAm, dBA
(Zuschauerpositionen)
Leerlauf/Betrieb Leerlauf/Betrieb
keine meßbaren
Schallemissionen keine meßbaren Schallemissionen
keine meßbaren
Schallemissionen keine meßbaren Schallemissionen
1Current values for specific configurations are available from Digital Equipment Corporation
representatives. 1 B = 10 dBA.
2Aktuelle Werte für spezielle Ausrüstungsstufen sind über die Digital Equipment
Vertretungen erhältlich. 1 B = 10 dBA.

Associated Documents
DECrepeater 900FL 17
The following documents provide related information about the module.
Document Description
DEChub 900 MultiSwitch Owner’s Manual
EK-DH2MS-OM Provides installation, use, security, and troubleshooting information.
HUBwatch Installation and Configuration
AA-Q0FXB-TE Provides information for installing and configuring HUBwatch for Windows V2.0.
HUBwatch Use
AA-PW4BC-TE Provides network management and DEChub 900, DEChub 90 and DEChub ONE functionality
information for HUBwatch for Open VMS V3.0.
Using DECndu Plus (MS–DOS)
AA-PYVVA-TE Provides instructions to upgrade the firmware in an MS-DOS environment in selected network
devices using Digital’s Network Device Upgrade
(DECndu) Plus utility.
Using DECndu Plus (OPENVMS VAX)
AA-PYVRA-TE Provides instructions to upgrade the firmware in an OPEN VMS VAX environment in selected
network devices using Digital’s Network Device
Upgrade (DECndu) Plus utility.
OPEN DECconnect Applications Guide
EC-G2570-42 Contains general descriptions to help plan and install networking systems based on Digital
Equipment Corporation’s OPEN DECconnect
system and networking products.

Printed in U.S.A.