3com 3C16465C, 3C16464C User Manual

SuperStack® 3 Baseline 10/100 Switch 12-Port (3C16464C) and
24-Port (3C16465C) User Guide

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INTRODUCTION

The SuperStack® 3 Baseline 10/100 Switch is a versatile,
easy-to-use unmanaged switch. It is ideal for users who want the
high-speed performance of 10/100 switching but do not need
sophisticated management capabilities. The Baseline 10/100
Switch is shipped ready for use. No configuration is necessary.

The Baseline 10/100 Switch has 12 or 24 shielded RJ-45, 10/100
Mbps auto-negotiating ports on the front panel. Each port
automatically determines the speed and duplex mode of the
connected equipment and provides a suitable switched
connection. Each port also provides Auto MDIX.

The Baseline 10/100 Switch is suited for office use where it can
be free standing, or rack mounted (in a wiring closet or
equipment room).

The Baseline 10/100 Switch comes with:

!

One power cord for use with the Baseline 10/100 Switch

!

Four self-adhesive rubber pads

!

One mounting kit

The Switch can be powered either from the AC mains supply, or
through an optional 3Com SuperStack 3 Advanced Redundant
Power System (3C16071B). Contact your supplier for details.

The diagram below shows an example configuration:

The Baseline 10/100 Switch provides high performance switched
connections to 10 Mbps and 100 Mbps hubs, servers and
workstations that require a dedicated switched link.

1

HOW TO USE THE BASELINE 10/100 SWITCH

f you connect two Baseline 10/100 Switch units together,

Numbered elements in this diagram refer to numbered sections in
the text. A 24-port unit is shown.

Front Panel

1

24 RJ-45 10/100 Ports

WARNING

sockets. They cannot be used as standard traditional
telephone sockets, or to connect the unit to a traditional
PBX or public telephone network. Only connect RJ-45
data connectors, network telephony systems, or network
telephones to these sockets. Either shielded or unshielded
data cables with shielded or unshielded jacks can be
connected to these data sockets.
AVERTISSEMENT: Les ports RJ-45. Ceux-ci sont
protégés par des prises de données. Ils ne peuvent pas
être utilisés comme prises de téléphone conventionnelles
standard, ni pour la connection de l’unité à un réseau
téléphonique central privé ou public. Raccorder seulement
connecteurs de données RJ-45, systèmes de réseaux de
téléphonie ou téléphones de réseaux à ces prises. Il est
possible de raccorder des câbles protégés ou non
protégés avec des jacks protégés ou non protégés à ces
prises de don.
WARNUNG: RJ-45-Porte. Diese Porte sind geschützte
Datensteckdosen. Sie dürfen weder wie normale
traditionelle Telefonsteckdosen noch für die Verbindung
der Einheit mit einem traditionellem privatem oder
öffentlichem Telefonnetzwerk gebraucht werden. Nur
RJ-45-Datenanscluße, Telefonnetzsysteme or Netztelefone
an diese Steckdosen anschließen. Entweder geschützte
oder ungeschützte Buchsen dürfen an diese
Datensteckdosen angeschlossen werden.

10BASE-T/100BASE-TX Ports

The Baseline 10/100 Switch has 12 (3C16464C) or 24
(3C16465C) 10/100 Mbps auto-negotiating ports.

To connect a device to the Baseline 10/100 Switch, use
Category 5 unshielded or shielded (screened) 100 Ohm
TP cable (or Category 3 cable for a 10 Mbps connection).
The maximum length of cable for each connection is
100m (328ft). Connect one end of the cable to an RJ-45
port on the Baseline 10/100 Switch, and the other end to
the appropriate RJ-45 port on the connecting device.

Each port on the Baseline 10/100 Switch is
auto-negotiating: its speed and duplex mode (half duplex
or full duplex) are automatically determined by the
capabilities of the connected device.

Each port is Auto MDIX and can be connected to either a
10BASE-T or a 100BASE-TX device.

: RJ-45 ports. These are shielded RJ-45 data

2

The first (top) and third row of LEDs, which are colored yellow,
show the activity or duplex status of the related ports:

!

!

3

The second and fourth (bottom) row of Status LEDs, which are
colored green, show the link or speed status of the related ports:

!

I

the link between them operates at 100Mbps full duplex.
You must use Category 5 cable when connecting the
units.

CAUTION: The Baseline 10/100 Switch supports full
duplex auto-negotiation. If the connected device does not

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support auto-negotiation, the Switch will operate in half
duplex mode (even if the device is operating in full duplex
mode). In such a configuration, you may notice some
degradation of network performance. 3Com recommends
that you use devices that are capable of auto-negotiation
(and that you ensure that auto-negotiation is enabled, if
it is a configurable option).

Activity/Duplex Status LEDs

When the Display Function switch is out (its normal position),
these LEDs show the activity of each port. The LED flashes
when packets are received or transmitted on the port.

When the Display Function switch is pressed in, these LEDs
show the duplex status of each port:

Status Meaning

Ye llo w The port is operating in full duplex mode.

Off If the link is established, the port is operating in half duplex

mode.

Link/Speed Status LEDs

When the Display Function switch is out (its normal position),
these LEDs show the link status of each port:

Status Meaning

Green The link has been established and the segment attached to

Off If the link has not been established, either nothing is con-

the port is functional.

nected to the port, or there is a problem:

■

Check that the attached device is powered on.

■

Check that the cable is the correct type and is not faulty.

If these checks do not identify the cause of the problem, it
may be that the unit or the device connected to the port is
faulty. Contact your supplier for further advice.

2

!

When the Display Function switch is pressed in, these LEDs
show the speed status of each port:

Status Meaning

Green The link is operating at 100 Mbps.

Off If the link is present, it is operating at 10 Mbps.

4

Power/Self Test LED

The Power/Self test LED shows the power status of the Switch:

Status Meaning

Green The unit is powered on and ready for use.

Off The unit is not receiving power:

■

Check the power cord is connected correctly.

■

If the unit still does not operate, contact your supplier.

5

Display Function Switch

This switch affects the Status LEDs described in 2 and 3.

This is the normal position of the switch.

Out

The Status LEDs show the Activity and Link Status of
each port.

When the switch is pressed in, the Status LEDs show

In

the Duplex and Speed Status of each port. The switch
returns to the out position when released.

6

Self-adhesive Pads

The unit is supplied with four self-adhesive rubber pads.

You do not need to apply the pads if you intend to rack
mount the unit.

If the unit is to be part of a free standing stack, apply the pads to
each marked corner area on the underside of the unit. Place the
unit on top of the lower unit, ensuring that the pads locate with
the recesses of the lower unit.

Rear Panel Connections

7

Power Supply

The Baseline 10/100 Switch automatically adjusts to the supply
voltage. Only use the power cord that is supplied with the
Baseline 10/100 Switch.

8

Socket for Redundant Power System (RPS)

Only connect a 3Com SuperStack 3 Advanced RPS (3C16070,
3C16071, 3C16071A or 3C16071B) to this socket. An
appropriate power module and cable is required. The connector
on the Baseline 10/100 Switch is a Type 1, 60W socket. For
details, follow the installation instructions in the guides that
accompany the Advanced RPS and the power module.

INSTALLING THE SWITCH

Positioning the Baseline 10/100 Switch

CAUTION: If installing the Baseline 10/100 Switch in a
stack of different size SuperStack 3 units, the smaller

!

units must be installed above the larger ones. Do not
have a free standing stack of more than six units.

When deciding where to position the Baseline 10/100 Switch
ensure:

!

It is accessible and cables can be connected easily.

!

Cabling is away from sources of electrical noise such as
radios, transmitters and broadband amplifiers, and away from
power lines and fluorescent lighting fixtures.

!

Water or moisture cannot enter the case of the unit.

!

Air flow around the unit and through the vents in the side of
the case is not restricted (3Com recommends that you
provide a minimum of 25 mm (1 in.) clearance).

To prolong the operational life of your units:

!

Never stack units more than six high if free standing, and
ensure that cables are supported so that they do not cause
the stack to fall over.

!

Do not place objects on top of any unit or stack.

!

Do not obstruct any vents at the sides of the case.

Power Up

Use the following sequence to power up the Baseline 10/100
Switch:

!

Check the network connections and cables.

!

Connect the power supply cable to the appropriate power
socket on the rear panel of the unit; refer to 7 or 8.

!

Connect the plug to the power supply outlet socket and
switch on the power supply at the socket. If you are using
the Advanced Redundant Power System, ensure it is powered
on.

When the switch is powered on, the Power/Self Test LED should
first flash green, then stay lit. If it does not, refer to 4.

Spot Checks

At frequent intervals you should visually check the Baseline
10/100 Switch. Regular checks can give you an early warning of a
possible failure; any problems can then be attended to when
there will be least effect on users. Check that all external cabling
connections are secure and that no cables are pulled taut.

If you experience any problems operating the Baseline 10/100
Switch, refer to “

Problem Solving” on page 5.

Rack Mounting

The Baseline 10/100 Switch can be mounted in a 19-inch
equipment rack using the Mounting Kit. Refer to “

Instructions” on page 5.

Mounting Kit

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