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3Com 3C16440 - SuperStack II Baseline Hub 12 Datasheet

3C16441 - SuperStack II Baseline Hub 24 3C16465A

Made by: 3Com
Type: Datasheet
Category: Switch
Pages: 12
Size: 0.52 MB

 

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data sheet

10 and 10/100 Mbps Networking Solutions

The SuperStack

®

II Baseline family

builds on the tremendous success of
SuperStack II enterprise networking
solutions by delivering powerful,
unmanaged connectivity in a full
range of networking technologies.
From 10 Mbps Ethernet hubs to
high-speed 10/100 Mbps switching, 
the Baseline family satisfies the 
need for high-quality products 
at an affordable price—enabling
even the most budget-conscious
organizations to trade up to the
next level of networking power. 

SuperStack II Baseline hubs and
switches provide cost-effective,
unmanaged solutions across 
a wide range of networking 
technologies for people who 
need the assurance of high 
quality, reliability, and robustness 
of 3Com’s SuperStack II family.

The SuperStack II Baseline family
comprises four key components:
Ethernet workgroup hubs; Ethernet
workgroup switches with Fast
Ethernet uplinks; auto-sensing dual-
speed Fast Ethernet hubs, which
automatically optimize the speed of
the network; and powerful 10/100
Mbps auto-sensing switches for the
ultimate in dedicated high-speed
connectivity. 

Key Benefits

Performance to suit your 
application and budget.
Whether you need the ultimate
power of 10/100 Mbps switching
or simply 10 Mbps Ethernet
hubs, SuperStack II Baseline
products give you a high-quality
solution to meet both your 
application needs and budget
requirements.

Easy to install and use.
All SuperStack II Baseline 
products are shipped ready 
to work straight from the box. 
No configuration is necessary.
Simply plug them in, and they
will run....and run.

Superior reliability.
Proven reliability, combined 
with optional SuperStack II
power systems provide you with
nonstop troublefree operation.

Year 2000 Compliance.
All SuperStack II Baseline 
hubs and switches are year 
2000 compliant.

Lifetime limited warranty.
Get the peace-of-mind you need
from the SuperStack II family.

The complete SuperStack II 
Baseline family

SuperStack

®

II Baseline 

Hubs and Switches

High-quality, unmanaged products providing cost-effective 
network solutions for a wide range of applications

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SuperStack

® 

II

 


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2

Hubs are the most basic building 
blocks for connecting together your 
PCs, servers, and peripherals to form 
a network. Sometimes referred to as
repeaters, hubs allow the attached 
network devices to communicate with
each other and share information.
Connections to hubs are often referred
to as shared media connections, such as 
shared 10 or shared 100, as opposed to
switched connections.

There are two types of hub in 

the SuperStack II Baseline family:

The Baseline Hub, which 
communicates with other network 
devices at a speed of 10 Mbps;

The Baseline Dual Speed Hub, 
which is capable of communicating
with other network devices at up 
to 100 Mbps.

Both are available in 12- and 24-port
variants.

The right choice for you will depend

on the performance you need and the
speed at which your network devices 
are capable of running. If some of your
PCs, servers, and network peripherals
are capable of running at 100 Mbps,
you will benefit from the tremendous
performance increase of the Baseline
Dual Speed Hub.

According to ISO/IEEE standards,

there is a limit to the number of hubs
that can be connected in series. 
For 10 Mbps, the limit is four; for 
100 Mbps, the limit is two.

Why would you need a switch?
Although they provide the same 
connectivity for your network cables 
as hubs, switches give you far superior
network performance. They do this by
increasing the network’s available data
bandwidth (the maximum capacity of
the network for moving data). Instead
of sharing the total available bandwidth
among all connected users, as a hub
does, a switch gives each attached 
network device its own dedicated
amount of bandwidth.

For example, any 10 Mbps hub 

will offer 10 Mbps of bandwidth to 
be shared among all devices attached 
to it. An equivalent switch will offer 
10 Mbps of bandwidth for exclusive use
by each attached device. Performance
will be much faster. It is further
increased if the switch supports full-
duplex links like the Baseline switches.

Switches operate by learning the unique

MAC address of each network device on
your LAN, and by knowing which port
each one is connected through.

There are two types of switches in the

SuperStack II Baseline family: 

The Baseline Switch communicates
with other network devices at a
speed of 10 Mbps, and has two
10/100 Mbps links capable of run-
ning at 100 Mbps for fast links to
servers or the network backbone; 

The Baseline 10/100 Switch, 

is capable of communicating 
with other network devices at up 
to 100 Mbps on all ports for the 
ultimate in high-speed connectivity.

Both are available in 12- and 24-port
variants.

Switches are most suited to certain

applications:

Near the core of the network, 
they eliminate bottlenecks and 
improve the overall network 
throughput;

They can extend the span of a 
network that has the maximum 
allowed hubs connected in series;

When used as a desktop 
connectivity device, they provide 
the highest possible performance 
for connecting users to your 
network.

Hubs

Switches

10/100 Mbps 
(Dual Speed) Operation

Today, more and more PCs, servers, 
and network peripherals that you buy
have the capability to connect to either
a 10 Mbps or 100 Mbps network link.
They can operate up to 10 times the
speed of traditional 10 Mbps links as
long as the hubs or switches they are
connected to can support 100 Mbps
operation. Why waste this latent 
performance by connecting them 
to a network device running at only 
10 Mbps?

Your concern might be that you have

some older PCs, printers, or peripherals
that have a 10 Mbps-only network 
connection. You will probably not 
want to upgrade all of these at once to
connect to 100 Mbps hubs or switches.
In fact, some of your legacy devices may
not upgrade from 10 Mbps.

So, how can you connect some

devices into your hubs and switches 
at 10 Mbps and some at 100 Mbps?
How do you ensure that you don’t 
connect them at the wrong speed? 
By using a dual-speed hub or a switch
with 10/100 Mbps links on every port,
they will communicate with connected
equipment at either 10 Mbps or 
100 Mbps as appropriate.

After installing a dual-speed hub 

or a 10/100 Mbps switch, you can 
gradually and seamlessy migrate 
your network to run at 10 times the
speed! You can add newer, high-speed
network devices or upgrade your
existing equipment as the need 
arises (and your budget allows).

The SuperStack II Baseline family

includes:

The Baseline Dual Speed Hub; and

The Baseline 10/100 Switch

Both are autosensing. They will link up
with your network users at 100 Mbps, if
possible, otherwise, they will instantly
and automatically revert to running at
10 Mbps. They always ensure that your
network runs as fast as your users are
capable. There’s no need to worry about
patching a PC or a server to a hub or
switch at the wrong speed—and no
need to worry about whether you’re
wasting valuable network bandwidth.

 


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3

3C16440

SuperStack II Baseline Hub

103,389

1,779,785

12 port

(203 years)

3C16441

SuperStack II Baseline Hub

97,425

1,368,075

24 port

(156 years)

3C16592A

SuperStack II Baseline Dual Speed Hub

55,816

459,360

12 port

(52 years)

3C16593A

SuperStack II Baseline Dual Speed Hub

44,949

307,563

24 port

(35 years)

3C16460

SuperStack II Baseline Switch

76,820

507,012

12 port 10 Mbps switched ports plus 

(57 years)

2 x 10/100 Mbps auto-sensing ports

3C16462

SuperStack II Baseline Switch

73,491

625,408

24 port 10 Mbps switched ports plus 

(71 years)

2 x 10/100 Mbps auto-sensing ports

3C16464A

SuperStack II Baseline 10/100 Switch

82,963

760,096

12 port

(87 years)

3C16465A

SuperStack II Baseline 10/100 Switch

67,662

645,753

24 port

(74 years)

Theoretical

MTBF (hours)

Actualized

Most links between network devices
run in half-duplex mode. This is the
traditional mode of Ethernet opera-
tion allowing communication across
the cabling in one direction at any
particular time. Full-duplex mode
allows simultaneous bidirectional
traffic. It effectively doubles the
throughput across UTP cable to 
20 Mbps for Ethernet and 200 Mbps
for Fast Ethernet.

Full-duplex communication can only
be sustained between two switches,
or between a switch and a network
end-station (such as a PC or server).
Hubs (Ethernet or Fast Ethernet) 
are not able to support full-duplex
network links according to ISO/IEEE
standards.

Full-duplex autonegotiation is 
the process where the network
devices at either end of the cable

(for example a switch and a server)
automatically decide whether they
will communicate in either full- or
half-duplex mode. It will happen
almost instantaneously when the
UTP cable is connected and the link 
is first made. 

Full-duplex operation is especially
effective for relieving bottlenecks 
that might exist in a network, 
for example, on a link between two
switches or on a link from a switch
to a network server.

All SuperStack II Baseline Switches
support full-duplex autonegotiation
on every port, so you can be sure
you get the ultimate capacity from
your installed equipment.

Full-duplex autonegotiation

MDI/MDIX Switch

The MDI/MDIX switch on the 
front panel of 3Com’s SuperStack II
Baseline products lets you build
your entire network using standard
UTP cabling. By using the MDI/MDIX
switch, your hubs and switches are
cascaded together without the need
to use special crossover cable.

Reliability

3Com Baseline products have been
designed with reliability in mind. 
You can be assured they will give 
you troublefree operation. 3Com uses
advanced HALT (Highly Accelerated
Life Test) techniques at the design-
phase to stress-test our products 
far beyond any normal operating 
conditions. We can identify and 
design-out even the most minimal 
contributors to unit failure.

This is reflected in the reliability 

figures for each of the SuperStack II
Baseline products, as shown in the
table. Reliability is expressed as a 
Mean Time Before Failure (MTBF) 
in hours, and calculated according 
to an established industry standard
(MIL-HBK 217 F Notice 1). Because
the theoretical calculation has proved to 
be extremely conservative, we also quote
an actualized figure. This is derived
from the in-service reliability track
record of the tremendous installed-base
of 3Com SuperStack II products.

The table shows that for simpler

technology such as hubs, the MTBF 
is far greater than on more complex
products such as dual-speed hubs. 
Even so, with a worst-case MTBF 
of 35 years, the SuperStack II Baseline
products have built-in reliability found
in no other brand.

Warranty

For complete peace-of-mind, all 3Com
SuperStack II Baseline products come
with a lifetime limited warranty.
As part of this we provide you with 
an advanced hardware exchange 
service for the first year from your 
date of purchase, in accordance with
3Com’s standard terms and conditions.
To qualify, you must complete and
return your product registration card 
to 3Com. Consult your user guide for
full details.

SuperStack II Power Systems

1. Advanced Redundant Power System
For the ultimate protection 
against network downtime, all
SuperStack II Baseline products 
are equipped with a connector to 
support the SuperStack II advanced
Redundant Power System (ARPS). 
This system gives you the means 
to provide SuperStack II units 
with a redundant power supply 
source for uninterrupted operation 
in the unlikely event of a power
supply failure.

2. Uninterruptible Power System
The SuperStack II Uninterruptible
Power System (UPS) keeps your
system up and running during power
failures or disruption to the main
supply. Up to four SuperStack II 
units can be powered from a single
UPS. The system also protects you
against brownouts or spikes that 
occur in outside power lines. 

 


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The 3Com SuperStack II Baseline 
hubs provide high-quality connectivity
solutions at entry-level prices for shared
Ethernet networks that don’t require
comprehensive management. These
hubs are ideal for low-intensity network
environments such as general office
applications using small networked files.
With the lowest per-port cost in the
SuperStack II range, the Baseline hubs
offer exceptional value for money, and
provide the most cost-effective way to
add new users to a network. 

The SuperStack II Baseline Hubs 

provide 12- or 24-10BASE-T RJ-45
ports, allowing each hub to connect
either 12 or 24 users. Each hub has an
MDI/MDIX switch, which connects
multiple hubs—expanding the network
using normal UTP cabling. The
Baseline hubs provide a transceiver
interface slot, allowing connection to
alternative network media, such as 
fiber or coax. Optional transceiver
interface modules are available from
3Com.

12 or 24 RJ-45 10BASE-T 
connections

MDI/MDIX switchable port
allows for simple cascading of hubs
without the need for special
crossover cable.

Slot for optional transceiver inter-
face module provides a connection
to legacy networking devices or
fiber. 

19” size for easy installation in a
wiring closet. A rackmounting kit 
is supplied. The product can also 
be used free-standing.

Diagnostic LEDs indicate network
traffic, port status, and collisions,
making it easy to spot-check faults
and check individual port status.

3Com lifetime limited warranty

Connection for the SuperStack II
Advanced Redundant Power
System provides ultimate protec-
tion against network downtime.
The SuperStack II Advanced
Redundant Power System 
and Uninterruptible Power System
are available as options from 3Com.

SuperStack II Baseline Hubs 

The 12- and 24-port Baseline Hubs 
are equipped with a slot ready to 
accommodate one of 3Com’s slide-in 
transceiver interface modules. 
Here are some ways to use them:

1. They allow you to connect to legacy 

equipment via 10BASE2 (coaxial) 
cable or AUI cable. The following 
transceiver interface modules can 
be used for this:

Coaxial Module BNC connector 
(3C1206-6) – Provides direct 
connection to a 10BASE2 (coaxial) 
network via a BNC connector.

AUI Module female AUI connector 
(3C1206-0) – Provides connection 
to an external transceiver via an 
AUI connector.

Fan-Out Module male AUI connector 
(3C1206-4) – Provides direct connec-
tion to a PC, server, or network 
device via an AUI cable.

2. They can give you a direct interface 

from your Baseline Hub to a 10 Mbps 
fiber link (for example, a campus 
backbone connection). The following 
variants are available:

10BASE-FL Module with ST fiber 
connector (3C1206-5)

10BASE-FB Module with ST fiber 
connector (3C12067)

3. They can provide you with an 

additional 10BASE-T port.

UTP Module with RJ45 connector 
(3C12063)

Transceiver Interface Modules

SuperStack II Baseline Hubs

Front View

Back View

12 or 24 ports (RJ-45)

MDI/MDIX

switch

Port

status

LEDs

Power, 

network traffic, 

collision LEDs

Slot for transceiver

interface module

Advanced RPS

connector

(Burndy type)

 


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5

The 3Com SuperStack II Baseline 
Dual Speed Hubs give you the simplest
way to migrate to high-speed Fast
Ethernet networking while protecting
your existing network investment. The
Baseline Dual Speed Hubs allow you 
to provide high-speed connections to
users while maintaining compatibility
with legacy shared 10 Mbps Ethernet
networks. Power users using Fast
Ethernet who require faster server 
and network response times can coexist
with Ethernet users without draining 
valuable network bandwidth.

Each Baseline Dual Speed Hub 

has 12 or 24 auto-sensing ports, which
automatically detect the speed of the
attached device and optimize network
performance at either 10 Mbps or 
100 Mbps. The SuperStack II Baseline 
Dual Speed Hub is unmanaged and
works straight out of the box. There’s 
no need to set network speed. At last,
plug and play that is truly plug and play!

12 or 24 RJ-45 10BASE-T/
100BASE-TX connections.

Auto sensing on each port—
automatically senses the speed 
of the network device at the other
end of the cable and optimizes 
performance.

Integrated Ethernet to Fast
Ethernet switch provides seamless
integration between 10 Mbps and
100 Mbps segments.

SuperStack II Baseline Dual Speed Hubs

Conforms as a Class II Fast
Ethernet repeater, which means
that two SuperStack II Baseline
Dual Speed Hubs can be cascaded
in series (the maximum allowed
according to the Fast Ethernet
specification).

MDI/MDIX switchable port allows
for simple cascading of hubs
without the need for a special
crossover cable.

19” size for easy installation in a
wiring closet. A rackmounting kit 
is supplied. The product can also 
be used free-standing.

Diagnostic LEDs indicate port 
status, network traffic, and colli-
sions on 10 Mbps and 100 Mbps
segments, making it easy to spot-
check faults and check individual
port status.

3Com lifetime limited warranty

Connection for the SuperStack II
Advanced Redundant Power
System provides ultimate protec-
tion against network downtime.
The SuperStack II Advanced
Redundant Power System and
Uninterruptible Power System are
available as options from 3Com.

SuperStack II Baseline Dual Speed Hubs

Front View

Back View

12 or 24 ports (RJ-45)

MDI/MDIX

switch

Port 

status 

LEDs

Power, network traffic, 

collision LEDs

Advanced RPS 

connector

(60 W Type 1)

10/100 Autosensing

A port will automatically adjust its
speed according to the equipment
to which it is connected. When the
UTP cable is connected and the 
link is first established, the hub or
switch will instantly and automati-
cally sense the maximum speed 
of the device at the other end of 
the cable. It will communicate 
with the other device at 100 Mbps 
if possible, or else it will run at 
10 Mbps.

Note: Although you are able to use
Category 3 grade cabling for 10 Mbps
links, you must use Category 5 grade
cabling for links running at 100 Mbps.

 


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The 3Com SuperStack II Baseline
switch delivers the power of Ethernet
switching at an affordable price, and
includes two switched 10/100 Mbps
ports as standard. Designed to meet
your immediate performance demands, 
the Baseline switch is an ideal solution
when bandwidth is constrained and
users need a cost-effective solution to
speed up the network.

The Baseline switch has 12 or 24

10BASE-T switched ports and two
10/100BASE-TX (Ethernet or Fast
Ethernet) switched ports that automati-
cally detect the speed of connected
devices, optimizing network perfor-
mance to 100BASE-TX, where
applicable. These are ideal for use as
high-speed connections to servers or as
downlink ports to the rest of the net-
work where traffic is highest and
bandwidth is at a premium. The
SuperStack II Baseline switch is unman-
aged and works straight out of the box.

12 or 24 RJ-45 10BASE-T
switched connections.

Two RJ-45 10BASE-T/100BASE-
TX auto-sensing uplink ports
provide high-speed connections 
to network servers or a backbone
connection.

Autonegotiating full-/half-duplex
operation on each port doubles the
speed of each network connection 
to 20 Mbps (for 10BASE-T ports)
or up to 200 Mbps (for 100BASE-
TX ports).

MAC addresses support up to 
2,000 network devices on your
local area network.*

Two MDI/MDIX switchable 
ports (one 10 Mbps port and one
10/100 Mbps port) let you cascade
hubs and switches and add high-
speed downlink connections 
without using crossover cable.

19" size for easy installation in a
wiring closet. A rackmounting kit 
is supplied. The product can also 
be used free-standing.

Diagnostic LEDs indicate network
traffic, port status, speed

+

and 

full-/half-duplex

+

operation of the

10/100 Mbps ports, making it 
easy to spot-check faults and 
check individual port status.

SuperStack II Baseline Switch

3Com lifetime limited warranty 

Connection for the SuperStack II
Advanced Redundant Power
System provides ultimate protec-
tion against network downtime.
The SuperStack II Advanced
Redundant Power System 
and Uninterruptible Power System
are available as options from 3Com.

Back View

12 or 24 RJ-45 ports

MDI/MDIX

switch

LEDs for link status

and network traffic

LEDs to indicate 10/100 Mbps 

speed and full/half duplex

Advanced RPS connector

(60 W Type 1)

2 RJ-45 ports for 

10/100 Mbps connections

MDI/MDIX

switch

Front View

SuperStack II Baseline Switch

Backbone

WAN/SNA Host

Power Systems

Transcend Network 
Management Architecture

RMON-2 Probes

Open Hub

Access Servers

SDLC Converters

Routers

Switches

Hubs

The 3Com SuperStack II system gives you a 
flexible, cost-effective connectivity solution 
for local, wide area, and SNA networks. You 
can combine diverse technologies and network 
services in one stacked system, strengthen it 
with uninterruptible and redundant power 
systems, and manage it all with Transcend

®

network management solutions. 

As an important part of the 3Com Transcend
Networking framework, SuperStack II systems 
will meet your evolving network needs—
futureproofing your network investment. 

A single SuperStack II system provides 
connections for a range of network environments
and protocols: Ethernet, Fast Ethernet, Layer 3
Switching, Gigabit Ethernet, Token Ring, FDDI,
ISDN, X.25, Frame Relay, and ATM. Depending 
on your needs, you can build SuperStack II 
systems for virtually any network environment.
Capabilities include: 

Hubs for flexible workgroup connectivity that
feature SNMP, RMON and Web-based manage-
ment 

Industry-leading physical layer support for
Token Ring networks, including Token Ring
switching

Full SNMP, RMON, and Web-based management
for Ethernet, Fast Ethernet, Gigabit Ethernet, as 
well as a dedicated RMON/RMON-2 probe

Full range of switches to increase performance
in high-speed client/server LANs

Full, multiprotocol network access for telecom-
muters or users at other off-site locations 

Routing between central site and branch 
offices using innovative Boundary Routing

®

architecture or conventional routing software
for multiple WAN choices, including ISDN 

SNA-to-LAN conversion linking local and 
remote offices to an SNA host system

Choice of power systems to ensure 
uninterrupted network operation

For smaller offices with fewer than 20 users, 
our OfficeConnect

®

products can be used 

to complement SuperStack II systems.

SuperStack II

* 750 MAC addresses supported by 12-port version
+ Only available on 24-port version

 


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The 3Com SuperStack II Baseline
10/100 switches provide the highest
performance product in the SuperStack II
Baseline family. Delivering the power of
switched Fast Ethernet while automati-
cally sensing the speed of the connected
devices, the SuperStack II Baseline
switches are ideal for any environment
where raw power and performance are
needed, but management is not
required. The Baseline 10/100 switches
can be used as an aggregation device
connecting to other switches or hubs, 
or to provide cost-effective, highest-
performance desktop connections. 

The Baseline 10/100 switches 

provide 12 or 24 10/100BASE-TX 
(Fast Ethernet) switched ports that
automatically detect the speed of 
connected devices, optimizing network
performance to 100BASE-TX, where
applicable. The SuperStack II Baseline
switches are unmanaged and work
straight out of the box.

12 or 24 RJ-45 10BASE-T/
100BASE-TX auto-sensing ports 
provide the ultimate in high-speed
switching connectivity.

Autonegotiating full-/half-duplex
operation on each port doubles the
speed of each network connection 
to 200 Mbps.

MAC addresses support up to 
4,000 network devices on your 
local area network.

IEEE 802.3x Flow Control ensures
network traffic is not lost during
peaks in traffic rates on high-
throughput, full-duplex links.

19” size for easy installation in a
wiring closet. A rackmounting kit 
is supplied. The product can also 
be used free-standing.

Diagnostic LEDs indicate network
traffic and port status of each port,
making it easy to spot-check faults
and check individual port status.

3Com lifetime limited warranty 

Connection for the SuperStack II
Advanced Redundant Power
System provides ultimate protec-
tion against network downtime.
The SuperStack II Advanced
Redundant Power System and
Uninterruptible Power System are
available as options from 3Com.

SuperStack II Baseline 10/100 Switches

SuperStack II Baseline 10/100 Switches

Front View

Back View

12 or 24 ports (RJ-45)

LEDs for link status

and network traffic

Advanced RPS 

connector

(Type 2)

If network traffic becomes so high
that a switch can no longer process
all the data, one of two things may
happen. The switch may drop data
(not retransmit all of it). Network
software protocols will need to
recover lost data, and the network
will be significantly slower.

Alternatively, a switch may be able
to employ methods to ensure that
data is not lost by controlling the
flow of the traffic. IEEE 802.3x 

Flow Control allows a switch to 
do this.

The potential for very high 
network traffic rates is most 
acute on 100 Mbps links running
in full-duplex mode. To ensure that 
network traffic is not lost, the
SuperStack II Baseline 10/100
Switches employ IEEE 802.3x 
Flow Control to keep the network
running at peak performance.

802.3x Flow Control

MDI/MDIX

switch

 


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8

Printer

Fiber link to another building

Thick or thin coax legacy backbone

Local 

server

SuperStack II Baseline Hubs giving 

shared 10 Mbps connectivity to local 

workgroups over UTP cabling

Printer

Printer with a nonchangeable 

10 Mbps Ethernet connection

100 Mbps

100 Mbps

100 Mbps

100 Mbps

100 Mbps

Baseline Dual Speed Hubs connected 

together over a 100 Mbps link

Server(s) equipped 

with 10/100 Mbps NICs

High-performance 

CAD/CAM workstations 

equipped with 10/100 

Mbps

 NICs

Workgroup with a 

mixture of shared 

10 Mbps and shared 

100 Mbps to the desktop

10 Mbps

100 Mbps

10 Mbps

100 Mbps

10 Mbps

SuperStack II Baseline Dual Speed Hubs
are used here to provide a small-to-
medium sized office (up to 42 network
connections) with a mixture of shared 10
Mbps and shared 100 Mbps links to the
desktop.

The Baseline Dual Speed Hub autosenses
those network devices capable of running
at 100 Mbps (such as the network servers
and the CAD/CAM workstations), and 
provides them with a 100 Mbps link. 
The link between the Baseline Dual
Speed Hubs will run at 100 Mbps.

Shared 10/100 Mbps in a Small-to-Medium Sized Office

* According to configuration rules in the Fast Ethernet specification (IEEE 802.3u), no more  than two Class II Fast Ethernet repeaters 
(such as the SuperStack II Baseline Dual Speed Hub) can be connected in a series. To expand the above network, a switch is needed.

SuperStack II Baseline hubs provide the
most cost-effective method of connecting
workgroups to a legacy LAN.

A transceiver interface module is used 
to connect to a thin coaxial cable or thick
coaxial cable legacy backbone (via an 
AUI and external transceiver). Similarly, 
a transceiver interface module provides 
a fiber link to another building.

Shared 10 Mbps Connections to a Legacy LAN

 


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9

SuperStack II Baseline 

Dual Speed Hubs

Floor 2

Floor 1

Basement

SuperStack II Baseline 

Switch and Baseline Hub

SuperStack II 

Baseline 10/100 Switch 

and ARPS

Main network servers with 

switched 100 Mbps connections

Switched 

100 Mbps

Switched 

100 

Mbps

Switched 

100 Mbps

Switched 

100 Mbps

Switched 

100 Mbps

Switched 

100 Mbps

Switched 

100 Mbps

Shared 

10 Mbps

Shared 

10 Mbps

Shared 

100 Mbps

Local 

server on 

100 Mbps

Shared 

100 Mbps

Shared 

10 Mbps

Shared 

10 Mbps

Shared 

10 Mbps

Shared 10 Mbps 

as a cost-effective 

solution for low-

intensity, workgroup 

applications

Printer

Shared 

100 Mbps

Shared 

100 Mbps

Shared 

10 Mbps

PCs and network 

devices with a mix 

of 10 Mbps and 

100 Mbps NICs

Shared 10 Mbps or 100 Mbps links 

provide a flexible, high-performance 

solution for a mixed environment.

Switched 

10 Mbps

Switched 

10 Mbps

Switched 

10 Mbps

Switched 10 Mbps for a 

high-performance workgroup

Local 

server

This shows a medium-sized office using a 
combination of all SuperStack II Baseline
products. A mix of switched and shared
10 Mbps and 10/100 Mbps delivers
higher performance connections where
they are needed, while keeping the
overall system cost to a minimum.

In the basement, a single SuperStack II
Baseline 10/100 switch provides 100
Mbps switched links to the floors 
and to each of the main servers.

On floor 1, a SuperStack II Baseline
switch and a Baseline hub provide a 
mix of switched 10 Mbps and shared 
100 Mbps network connections. Users
requiring the highest possible 
performance from a 10 Mbps link are
given switched connections to their 
desktops while those with less demand
on network access have 10 Mbps shared
links to the hub. Access to a local server
is provided via the second 100 Mbps 
connection from the Baseline Switch.

On floor 2, SuperStack II Baseline 
Dual Speed Hubs provide 10/100 Mbps
auto-sensing connections to each of the
network connections to workgroups that
have a mixture of 10 Mbps and 100 Mbps
network devices.

A Complete Solution for a Medium Enterprise

 


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10

As part of the SuperStack II range, 
the SuperStack II Baseline products can
be integrated smoothly and effectively
into a 3Com enterprise network solution
that employs network management but
that does not require it all the way to 
the desktop.

In this example, network management 
is used at the core of the network, and
is provided out to the workgroup level 
on the floor shown below by the
SuperStack II Switch 3300. 

High-performance, unmanaged 
connections are then provided to 
users’ desktops by the SuperStack
Baseline products, as shown.

Used in this way, reliable, high-speed 
network connections can be delivered 
to the desktop in an extremely cost-
effective way, while ensuring complete
compatibility and fitting in with the 
corporate network structure.

SuperStack II Baseline Within the Managed Network Environment

Local 

server 

Backbone link to fully managed

corporate network 

Switched 10/100 Mbps  

to the desktop

Workgroup 2

Shared 10/100 Mbps   

to the desktop

Workgroup 1

Switched 10 Mbps 

to the desktop

Workgroup 3 

SuperStack II 

Switch 3300

SuperStack II 

Baseline Switch

SuperStack II 

Baseline 10/100 Switch

SuperStack II Baseline 

Dual Speed Hub

 


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11

Specifications

SuperStack II Baseline Hubs and Switches

SuperStack II 
Baseline Hubs 

3C16440 (12 port)
3C16441 (24 port)

Functional: ISO 8802/3; 
IEEE 802.3 (Ethernet)

Media Interfaces: 12/24
shielded RJ-45 TP; ARPS 
connector (60 W Type 1);
Transceiver Interface Module 
slot

Indicators per unit: Power;
Network Traffic; Collisions

Indicators per port: Link Status;
Partition

MAC Addresses: N/A

Safety: IEC 950; UL 1950; 
CSA 22.2 No. 950; EN 60950

Electromagnetic: EN 55022 
Class B* and Class A;FCC Part 15
Subpart B Class A; ICES-003
Class A; VCCI Class B* and 
Class A; AS/NZS 3548 Class B*
and Class A; EN 50082-1

Environmental

EN 60068 (IEC 68)

Operating temperature: 0° to
50°C (32° to 122°F)

Operating Humidity: 10% to
95% (noncondensing)

Storage temperature: -10° to
+70°C (14° to 158°F)

Storage Humidity: 10% to 95%
(noncondensing)

Physical

Width: 440 mm (17.3 in)

Height: 44 mm (1.7 in), or 1U

Depth: 224 mm (8.8 in) 

Weight: 2.04 kg (4.5 lb)

Electrical

Fuse Protection: 2 A 

Power Inlet: IEC 320

Input Voltage Range: 100-240 V;   
50-60 Hz

Power Consumption (Maximum):
12-port, 34 W; 24-port, 44 W

SuperStack II ARPS Connection:
60 W Type 1

Heat Dissipation (Maximum)

12 port: 116 BTU/hr

24 port: 150 BTU/hr

SuperStack II Baseline Dual
Speed Hubs

3C16592A (12 port) 
3C16593A (24 port)

Functional: ISO 8802/3;
IEEE 802.3 (Ethernet); 
IEEE 802.3u (Fast Ethernet)

Media Interfaces: 12/24
shielded RJ-45 TP; ARPS 
connector (60 W Type 1)

Indicators per unit: Power;
Network Traffic (per segment);
Collisions (per segment)

Indicators per port: Link Status;
Partition

MAC Addresses: 4,000

Safety: IEC 950; UL 1950;
CSA 22.2 No. 950; EN 60950

Electromagnetic: EN 55022 
Class B* and Class A; FCC Part
15 Subpart B Class A; ICES-003
Class A; VCCI Class B* and 
Class A; AS/NZS 3548 Class B*
and Class A; EN 50082-1

Environmental

EN 60068 (IEC 68)

Operating temperature: 0° to
50°C (32° to 122°F)

Operating Humidity: 10% to
95% (noncondensing)

Storage temperature: -10° to
+70°C (14° to 158°F)

Storage Humidity: 10% to 95%
(noncondensing)

Physical

Width: 440 mm (17.3 in)

Height: 44 mm (1.7 in), or 1U

Depth: 173 mm (6.8 in)

Weight: 12 port: 2.1 kg (4.7 lb)
24 port: 2.3 kg (5 lb)

Electrical

Fuse Protection: 5 A 

Power Inlet: IEC 320

Input Voltage Range: 
100-120 V/200-240 V; 50-60 Hz

Power Consumption (Maximum): 
12-port, 84 W; 24-port: 130 W

SuperStack II ARPS Connection:
60 W Type 1

Heat Dissipation (Maximum)

12 port: 86 BTU/hr

24 port: 142 BTU/hr

SuperStack II
Baseline Switches

3C16460 (12 port, 10 Mbps
switched ports plus 2 x 10/100
Mbps auto-sensing ports)

3C16462 (24 port, 10 Mbps
switched ports plus 2 x 10/100
Mbps auto-sensing ports)

Functional: ISO 8802/3;
IEEE 802.3 (Ethernet);
IEEE 802.3u (Fast Ethernet)

Media Interfaces: 14 shielded 
RJ-45 TP; ARPS connector (60 W
Type 1)

Indicators per unit: Power

Indicators per port: Network
Traffic; Link Status; Speed
(10/100 Mbps ports); Full
Duplex (10/100 Mbps ports)

MAC Addresses: 12 port: 750;
24 port: 2,000

Safety: IEC 950; UL 1950;
CSA 22.2 No. 950; EN 60950

Electromagnetic: EN 55022 
Class B*; FCC Part 15 Subpart B
Class A*; ICES-003 Class A*;
VCCI Class B*; AS/NZS 3548
Class B*; EN 50082-1

Environmental

EN 60068 (IEC 68)

Operating temperature: 0° to
50°C (32° to 122°F)

Operating Humidity: 10% to
95% (noncondensing)

Storage temperature: -10° to
+70°C (14° to 158°F)

Storage Humidity: 10% to 95%
(noncondensing)

Physical

Width: 440 mm (17.3 in)

Height: 44 mm (1.7 in), or 1U

Depth: 173 mm (6.8 in) 

Weight: 2.04 kg (4.5 lb)

Electrical

Fuse Protection: 2 A 

Power Inlet: IEC 320

Input Voltage Range: 100-240 V;
50-60 Hz

Power Consumption (Maximum):
48 W

SuperStack II ARPS Connection:
60 W Type 1

Heat Dissipation (Maximum)

12 port: 164 BTU/hr

24 port: 72 BTU/hr

SuperStack II
Baseline 10/100 Switches

3C16464A (12 port)
3C16465A (24 port)

Functional: ISO 8802/3; 
IEEE 802.3 (Ethernet); 
IEEE 802.3u (Fast Ethernet); 
IEEE 802.3x (Flow Control)

Media Interfaces: 12/24
shielded RJ-45 TP; ARPS 
connector (Type 2)

Indicators per unit: Power

Indicators per port: Network
Traffic; Link Status; Speed
(10/100 Mbps ports); Full
Duplex (10/100 Mbps ports)

MAC Addresses: 4,000

Safety: IEC 950; UL 1950; 
CSA 22.2 No. 950; EN 60950

Electromagnetic: EN 55022 
Class B* and Class A; FCC Part
15 Subpart B Class A; ICES-003
Class A; VCCI Class B* and 
Class A; AS/NZS 3548 Class B*
and Class A; EN 50082-1

Environmental

EN 60068 (IEC 68)

Operating temperature: 0° to
50°C (32° to 122°F)

Operating Humidity: 10% to
95% (noncondensing)

Storage temperature: -10° to
+70°C (14° to 158°F)

Storage Humidity: 10% to 95%
(noncondensing)

Physical

Width: 440 mm (17.3 in)

Height: 44 mm (1.7 in), or 1U

Depth: 235 mm (9.3 in)

Weight: 2.6 kg (5.8 lb)

Electrical

Fuse Protection: 1 A 

Power Inlet: IEC 320

Input Voltage Range: 100-240 V;
50-60 Hz

Power Consumption (Maximum): 
200 W

SuperStack II ARPS Connection:
Type 2

Heat Dissipation (Maximum)

12 port: 165 BTU/hr

24 port: 300 BTU/hr

*Requires the use of Category 5 screened cables to comply with the requirements of this standard.

 


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SuperStack

® 

II

3Com Corporation
P.O. Box 58145
5400 Bayfront Plaza
Santa Clara, CA 95052-8145
Phone: 1 800 NET 3Com
or 1 408 326 5000
Fax: 1 408 326 5001
World Wide Web:
www.3com.com

Asia Pacific Rim
Sydney, Australia: 61 2 9937 5000
Melbourne, Australia: 61 3 9934 8888
Beijing, China: 86 10 68492 568
Shanghai, China: 86 21 6350 1581
Hong Kong: 852 2501 1111
India: 91 11 644 3974
Indonesia: 62 21 572 2088
Osaka, Japan: 81 6 536 3303
Tokyo, Japan: 81 3 5977 3266 

Toll free from Japan: 0120 313266

Korea: 82 2 3455 6300
Malaysia: 60 3 715 1333
New Zealand: 64 9 366 9138
Philippines: 632 892 4476
Singapore: 65 538 9368
Taiwan: 886 2 2 377 5850
Thailand: 662 231 8151 5

3Com Austria 
43 1 580 17 0

3Com Benelux B.V.
Belgium: 32 2 725 0202
Netherlands: 31 346 58 62 11

3Com Canada 
Calgary: 1 403 265 3266
Edmonton: 1 403 423 3266
Montreal: 1 514 683 3266
Ottawa: 1 613 566 7055
Toronto: 1 416 498 3266
Vancouver: 1 604 434 3266

3Com Eastern Europe/CIS
Bulgaria: 359 2 962 5222
Czech Republic: 420 2 21845 800
Hungary: 36 1 250 83 41
Poland: 48 22 6451351
Russia: 7 095 258 09 40
Slovak Republic: 421 7 317 850

3Com France 
33 1 69 86 68 00
Carrier and Client Access: 33 1 41 97 46 00 

3Com GmbH 
Munich, Germany: 49 89 627320

3Com Iberia
Portugal: 351 1 3404505
Spain: 34 1 509 69 00

3Com Latin America
U.S. Headquarters: 1 408 326 2093
Miami, Florida: 1 305 461 8400
Argentina: 54 1 312 3266
Brazil: 55 11 246 5001
Chile (serving Chile, Bolivia, and Peru):

562 240 6200

Colombia: 57 1 629 4847
Mexico: 52 5 520 7841/7847
Peru: 51 1 221 5399
Venezuela: 58 2 953 8122

3Com Mediterraneo
Milan, Italy: 39 2 253011
Rome, Italy: 39 6 5279941

3Com Middle East
971 4 319533

3Com Nordic AB
Denmark: 45 48 10 50 00
Finland: 358 9 435 420 67
Norway: 47 22 58 47 00
Sweden: 46 8 587 05 600

3Com Southern Africa
27 11 807 4397

3Com Switzerland
41 844 833 933

3Com UK Ltd.
Edinburgh: 44 131 240 2900
Ireland: 353 1 823 5000
Manchester: 44 161 873 7717
Winnersh: 44 1189 27 8200

SuperStack II Baseline 
Hubs and Switches

Specifications

To learn more about 3Com products and services, visit our World Wide Web site at www.3com.com. 3Com is a publicly traded corporation
(Nasdaq: COMS).

Copyright © 1998 3Com Corporation. All rights reserved. 3Com, the 3Com logo, Boundary Routing, OfficeConnect, SuperStack, and Transcend
are registered trademarks of 3Com Corporation. More connected. is a trademark of 3Com Corporation. Other product and brand names may be
trademarks or registered trademarks of their respective owners. All specifications are subject to change without notice.

Printed in U.S.A. on recycled paper

400411-002   12/98

Ordering Information

SuperStack II Baseline Products

SuperStack II Baseline Hub 
(12 port)

3C16440

SuperStack II Baseline Hub 
(24 port) 

3C16441

SuperStack II Baseline 
Dual Speed Hub
(12 port) 

3C16592A

SuperStack II Baseline 
Dual Speed Hub
(24 port) 

3C16593A

SuperStack II Baseline Switch 
(12 port 10 Mbps switched ports
plus 2 x 10/100 Mbps auto-
sensing ports) 

3C16460

SuperStack II Baseline Switch
(24 port 10 Mbps switched ports
plus 2 x 10/100 Mbps auto-
sensing ports) 

3C16462

SuperStack II Baseline  
10/100 Mbps Switch
(12 port) 

3C16464A

SuperStack II Baseline 
10/100 Mbps Switch
(24 port) 

3C16465A

Power Supply Systems

SuperStack II ARPS

3C16071

SuperStack II ARPS 60 W Power
Module Burndy Type

3C16072

SuperStack II ARPS 100 W 
Power Module Burndy Type

3C16073

SuperStack II ARPS Power
Module Type 2

3C16074

SuperStack II ARPS  
Y-Cable Burndy Type 

3C16079

SuperStack II ARPS 
Y-Cable Type 2 

3C16078

SuperStack II UPS 
(U.S.) 3C16010

SuperStack II UPS 
(International) 3C16011

SuperStack II UPS 
(Japan) 3C16012

Transceiver Interface Modules
for SuperStack II Baseline Hubs

AUI Transceiver 
Interface Module 
(One female AUI)

3C1206-0

TP Transceiver 
Interface Module 
(One RJ-45)

3C12063

Fan-Out Transceiver 
Interface Module 
(One male AUI)

3C1206-4

10BASE-FL Transceiver 
Interface Module 
(One pair ST)

3C1206-5

10BASE-FB Transceiver 
Interface Module 
(One pair ST)

3C12067

Coaxial Transceiver 
Interface Module 
(BNC)

3C1206-6

More SuperStack II Hubs and
Switches Product
Information

SuperStack II Baseline hubs 
and switches are the most cost-
effective, high-quality, unmanaged
hubs and switches. 3Com 
provides a complete range 
of fully featured, managed, 
and stackable hubs and 
switches with a variety of
upgrade options from the 
award-winning SuperStack II
product family. For more infor-
mation, refer to the SuperStack
II Dual Speed Hub 500 data
sheet, stock no. 400307-005, 
the SuperStack II Switch data
sheet, stock no. 400260-012, 
or the SuperStack II PS Family
Hub data sheet, stock no.
400234-006.