3Com 100BASE-FX DISTANCE EXTENDER User manual

®
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The duration of the warranty for the 100BASE-FX Distance Extender Module (3C16684) is lifetime.
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3Com Corporation, 5400 Bayfront Plaza, Santa Clara, CA, 95052-8145, U.S.A. Tel: [phone], 9/1/96
3Com, SuperStack, and Transcend are registered trademarks of 3Com Corporation.
Other brand and product names may be registered trademarks or trademarks of their respective holders.
© 1997 3Com Technologies
Part No. DUA1668-4AAA01
Published October 1997
100BASE-FX
DISTANCE EXTENDER MODULE
USER GUIDE
100BASE-FX Distance Extender Module
The 100BASE-FX Distance Extender Module
(3C16684) is designed for use with 3Com’s
SuperStack®II Dual Speed Hub 500 12- and
24-port versions (3C16610 and 3C16611) units.
When installed in a Dual Speed Hub 500 unit, the
Module provides a single 100Mbps Fast Ethernet
fiber 802.1D bridged port supporting either full
(FD) or half (HD) duplex modes. You can use this
port to provide a high-speed long distance (up to
2Km using FD mode) connection to another
segment of your network infrastructure, or to a
local server or endstation.
The Module also enables you to overcome the Fast
Ethernet network design limitations by forming
chains of almost limitless numbers of hubs; each
fiber link being up to 2Km long.
Examples of network configurations and more
information about Fast Ethernet configuration
rules can be found in the hub’s user guide.
When the Module is fitted in a managed Dual
Speed Hub 500 unit, it can provide traffic
statistics, link status and duplex mode. You may
also enable and disable the port.
Technical Specification
Forwarding Rate: 148,800 frames per second.
Forwarding Mode: fragment-free.
Operating temperature: 0–50°C (32–122°F).
Humidity: 0–95% non-condensing.
Power consumption: 5W maximum.
The Module is VLAN and LSA compatible. It filters
all frames smaller than 64 bytes in size. Frames
greater than 1522 bytes are forwarded, unless
there is traffic congestion, when they are
rejected. It forwards all other traffic, such as
normal traffic and multicast frames. No address
filtering is performed.
Standards
Electromagnetic Compatibility
FCC Statement:
This equipment has been tested with a Class A computing device
and has been found to comply with part 15 of FCC Rules. Operation
in a residential area may cause unacceptable interference to radio and
TV receptions requiring the operator to take whatever steps are
necessary to correct the interference.
CSA Statement:
This Class A digital apparatus meets all requirements of the Canadian
Interference-causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences
du Règlement sur le matériel brouilleur du Canada.
Handling the Module
CAUTION: The Module can easily be damaged
by electrostatic discharge.
To prevent damage, please observe the following:
■Do not remove the Module from its packaging
until you are ready to install it into the hub.
■Do not touch any of the pins, connections or
components on the Module.
■Handle the Module only by its edges and front
panel.
■Always wear an anti-static wristband connected
to a suitable earth point.
■Always store or transport modules in appropriate
anti-static packaging.
Functional ISO/IEC 8802-3
IEEE 802.1D
Safety UL 1950
EN 60950
EN 60825-1
CSA 22.2 #950
Environmental EN 60068
EMC EN55022 Class B
FCC Part 15 Class A
ICES-003 Class A
EN50082-1
AS/NZS 3548 Class B
VCCI Class B

3Keep the blanking plate in a safe place. If you
remove the Module, you must replace the
blanking plate to prevent dust and debris
entering the hub and maintain cooling air
circulation.
4Hold the Module so that the text on the front
panel is upright, and slide it into the hub,
ensuring the edge connector is fully engaged.
The front panel of the Module should lie flush
against the rear panel of the hub. Fix the front
panel of the Module to the hub using the two
screws from the blanking plate.
5Power up the hub.
6Check the LEDs on the hub to ensure that the
Module is operating correctly.
Connecting the Module
1Remove the protective plastic cover from the
fiber connector on the Module. Keep the cover
and refit it if you unplug the fiber cable from the
Module.
2Plug the SC connector on the fiber cable into
the fiber socket on the Module.
3Connect the other end of the fiber optic
segment to an appropriate device with a
100Mbps Fast Ethernet fiber interface.
The fiber optic segment can be used up to 2Km
(6600ft) in length when using full duplex
operation. In half duplex (factory setting) mode,
this distance is reduced to 412m (1350ft).
LEDs
LEDs on the front of the hub indicate the Module
status. Refer to the user guide that accompanies
the Dual Speed Hub 500 unit for a description of
the LED behavior.
Duplex Switch
The choice of duplex mode is made with the slide
switch on the front of the module. Ensure that
the switch is set to the mode you require before
connecting any cables. Make sure also that the
other device supports the chosen mode.
When connecting this module to a server, we
suggest you use half duplex mode.
Using the Distance Extender
The Distance Extender will connect to any Fast
Ethernet device with a fiber port. If that device
supports full duplex operation, the links may be
up to 2Km. If not, the distance is 412m.
You can connect two or more Dual Speed Hub
500 units using a Distance Extender at each end
of the link to form chains of units or stacks. At
full duplex, this gives 2Km for each link. Figure 2
shows the process of chain building.
You may install Distance Extender Modules in
any combination of transceiver slots within a Dual
Speed Hub 500 stack.
Take care not to create loops in the network.
Problem Solving
If you suspect a problem, carry out the following
checks before contacting your supplier:
■Ensure the hub in which the Module is fitted is
powered up.
■Ensure the Module is correctly installed.
■Ensure that the device at the far end of the
segment is powered up and operating correctly.
■Try reversing the Tx and Rx connections.
■Check that all connectors on the fiber optic
segment are correctly engaged.
■Clean the terminators by wiping them gently
with a clean tissue or cotton bud moistened with
a little ethanol. Dirty fiber terminators on the
fiber optic segment will impair the quality of the
light transmitted through the cable.
■Check that the duplex setting at both ends of
the link is at the same level.
Important Safety Information
WARNING: Installation and removal of the
Module must be carried out by qualified
personnel only. Before installing the Module
into a hub, you must first disconnect the hub
from the mains power supply. For full safety
instructions, refer to the user guide that
accompanies the hub.
WARNING: Fiber Optic ports –
Optical Safety
Never look at the transmit
LED/laser through a
magnifying device while it is
powered on. Never look
directly at the fiber TX port
and fiber cable ends when
they are powered on.
L’information de Sécurité Importante
AVERTISSEMENT: Confiez l'installation et la
dépose de ce module à un personnel qualifié.
Avant d'installer ce module dans un groupe,
vous devez au préalable débrancher ce groupe
de l'alimentation secteur. Pour prendre
connaissance des consignes complètes de
sécurité, consultez le guide utilisateur qui
accompagne ce groupe.
AVERTISSEMENT: Ports pour fibres optiques
– sécurité sur le plan optique.
Ne regardez jamais le voyant
(DEL) d'émission/le laser en
utilisant un dispositif
d'agrandissement, tant qu'il
est sous tension. Ne regardez
jamais directement le port TX
(Transmission) à fibres
optiques et les embouts de
câbles à fibres optiques tant
qu'ils sont sous tension.
Wichtige Sicherheitsinformationen
WARNUNG: Die Installation und der Ausbau
des Moduls darf nur durch Fachpersonal
erfolgen. Vor dem Installieren des Moduls in
einem Gerät muß zuerst der Netzstecker des
Geräts abgezogen werden. Vollständige
Sicherheitsanweisungen sind dem
Benutzerhandbuch des Geräts zu entnehmen.
WARNUNG: Faseroptikanschlüsse –
Optische Sicherheit.
Niemals mit einem
Vergrößerungsgerät ein
Übertragungs-LED/Laser
betrachten, während dieses
eingeschaltet ist. Niemals
direkt auf den
Faser-TX-Anschluß und auf
die Faserkabelenden schauen,
während diese eingeschaltet
sind.
Installing the Module into a Hub
CAUTION: Do not install the Module in
unsuitable hubs such as those in the Hub 10,
PS Hub, and Hub 100 ranges. Contact your
supplier for advice if necessary.
1Ensure that the hub is disconnected from the
mains power supply, and you are wearing an
anti-static wristband connected to a suitable
earth point.
2With the hub on a flat surface, remove the
screws of one blanking plate from the rear of
the hub. Do not remove any other screws
from the rear of the hub.
Figure 1 100BASE-FX Distance Extender Module
.
Figure 2 Chaining Dual Speed Hub 500 units with 100BASE-FX Distance Extender Modules
Connections from Distance Extender in one stack to Distance Extender in next stack (or to
fiber port in any Fast Ethernet device).