3COM 10BASE-T User Manual
SuperStack® 3 Baseline 10/100 Switch 24-Port 10BASE-T/100BASE-TX
plus 1-Port 1000BASE-T (3C16467) User Guide
DUA1646-7AAA02
I
NTRODUCTION
The SuperStack® 3 Baseline 10/100 Switch 24 Port
10BASE-T/100BASE-TX plus 1-Port 1000BASE-T is a versatile,
easy-to-use unmanaged switch. It is ideal for users who want the
high-speed performance of 10/100 switching with the added
functionality of a 1000BASE-T link 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 24 Port 10BASE-T/100BASE-TX plus
1-Port 1000BASE-T has 24 shielded RJ-45, 10/100Mbps
auto-negotiating ports and one shielded RJ-45, 1000BASE-T port
on the front panel. Each 10/100Mbps port automatically
determines the speed and duplex mode of the connected
equipment and provides a suitable switched connection. The
1000BASE-T port is a fixed speed port that operates in full duplex
mode.
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
Four self-adhesive rubber pads
One mounting kit
The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus
1-Port 1000BASE-T provides high performance switched
connections to 10Mbps and 100Mbps hubs, servers and
workstations that need a dedicated switched link and a switched
fixed speed 1000 Mbps port that can connect to other
1000BASE-T ports or servers/workstations.
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.
1
H
OW TO
USE
THE
B
ASELINE
10/100 S
WITCH
24-P
ORT
The nu mbers in this diagra m refe r to num bered s ect ions in t he
text.
Front Panel
1
24 RJ-45 10/100 Ports and 1 RJ-45 1000 Port
WARNING:
sockets. They cannot be used as telephone sockets. Only
connect RJ-45 data connectors 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.
femelles blindées de données RJ-45. Vous ne pouvez pas
les utiliser comme prise de téléphone. Branchez uniquement des connecteurs de données RJ-45 sur ces prises
femelles. Les câbles de données blindés ou non blindés,
avec les jacks blindés ou non blindés, l’un ou l’autre, peuvent être branchés à ces prises de courant de données.
WARNUNG: RJ-45-Anschlüsse.
RJ-45-Datenbuchsen. Sie können nicht als Telefonanschlußbuchsen verwendet werden. An diesen Buchsen
dürfen nur RJ-45-Datenstecker angeschlossen werden.
Diese Datenstecker können entweder mit abgeschirmten
oder unabgeschirmten Datenkabeln mit abgeschirmten
oder unabgeschirmten Klinkensteckern verbunden werden.
10BASE-T/100BASE-TX Po rts
The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus
1-Port 1000BASE-T has 24 10/100Mbps auto-negotiating ports.
Ports 1–23 are MDIX ports. Each can be connected to a device
with an MDI port (such as a workstation) using a normal ‘straight
through’ TP (twisted pair) cable. Alternatively, you can connect to
a device with MDIX ports using ‘cross-over’ TP cab le.
Port 24 is ‘switch selectable’ MDI/MDIX us ing the MDI swit ch, as
described in 2. Using this port, you can connect to any other
device withou t the need fo r ‘cross-over’ cab le.
Ports 1 to 24 are auto-negotiating: their speed and duplex mode
(half duplex or full duplex) are automatically determined by the
capabilities of the connected device. Each port can be connected
to either a 10BASE-T or a 100BASE-TX device.
CAUTION:
duplex auto-negotiation. If the connected device does not
!
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).
1000BASE-T Port
Port 25 is a 1000BASE-T port capable of auto-negotiation with
the connected port to operate at 1000BASE-T full duplex. It
auto-senses an MDI/MDIX connection and can be used to connect
RJ-45 ports.
The Baseline 10/100 Switch supports full
These are shielded RJ-45 data
Il s’agit de prises
Dies sind abgeschirmte
to either another 1000BASE-T switch port or to a 1000BASE-T
server or workstation without additional configuration.
Connecting to a Netw ork Device
To connect a device to the Baseline 10/100 Switch 24 Port
10BASE-T/100BASE-TX plus 1-Port 1000BASE-T, use Category 5
unshielded or shielded (screened) 100 Ohm TP cable (or
Category 3 cable for a 10Mbps 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.
Connecting to another Switch or Hub
If you connect two Baseline 10/100 Switch 24 Port
10BASE-T/100BASE-TX plus 1-Port 1000BASE-T units
together, 3Com recommends that you use the
1000BASE-T ports on both units for the link. You must
use Category 5 cable when connecting the units.
1000BASE-T connection:
24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T to
another Switch using the 1000BASE-T port, use a normal ‘straight
through’ cable and connect each end to the 1000BASE-T port on
each unit.
100BASE-TX connection:
24 Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T to a
SuperStack 3 hub using a normal ‘straight through’ cable ,
connect any port on the Baseline 10/100 Switch 24 Port
10BASE-T/100BASE-TX plus 1-Port 1000BASE-T to the MDI/MDIX
port on the hub, as shown below. Ensure that the MDI switch on
the hub is in (MDI).
An alternative method of connecting the Baseline 10/100 Switch
to a hub using a normal ‘straight through’ cable is to connect any
MDIX port on the hub to the MDI/MDIX port on the Baseline
10/100 Switch, ensuring that its MDI Switch is set to in (MDI).
You can us e ‘cross-over’ TP cable to connect any MDIX port on
the Baseline 10/100 Switch to any MDIX port on a hub.
To connect a Baseline 10/100 Switch
To connect the Baseline 10/100 Switch
2
2
MDI Switch
This switch affects port 24 only:
Out Port 24 is an MDIX port.
It can be connected to a device with an MDI
MDIX
MDI
3
Display Function Switch
This switch affects the Status LEDs described in 4 and 5:
4
Activity/Duplex Status LEDs
The first (top) and third row of LEDs, which are colored yellow,
show the activity or duplex status of the related ports:
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:
On The port is operating in full duplex mode.
Off Ports 1 to 24: If the link is established, the port is
operating in half duplex mode.
Port 25: No link is present.
5
Link/Speed Status LEDs
The second and fourth (bottom) row of Status LEDs, which are
colored green, show the link or speed status of the related ports:
When the Display Function switch is out (its normal position),
these LEDs show the link status of each port:
On The link has been established and the segment
attached to the port is functional.
port (such as a workstation) using a normal
‘straight through’ TP cable.
In Port 24 is an MDI port.
It can be connected to an MDIX port on a
device (such as a hub) using a normal
‘straight through’ TP cable.
Out This is the normal position of the switch.
The Status LEDs show the Activity and Link
Status of each port.
In When the switch is pressed in, the Status
LEDs show the Duplex and Speed Status of
each port. The switch returns to the out position when released. This switch does not
affect port 25.
Off The link has not been established. Either nothing is
connected 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 the LED is off for port 24, check the setting of the
MDI switc h. Refe r to 2. Try toggling the MDI switch.
If the port is connected to another unit’s MDI/MDIX
port, check the other unit’s MD I swit ch p os ition.
If these checks do not identify the cause of a problem, it may be that the unit or the device connected
to the por t is faulty. Contac t your sup plier for fu rther advice.
When the Display Function switch is pressed in, thes e LED s
show the speed status of each port:
On Ports 1 to 24: The port is operating at 100Mbps.
Port 25: The port is operating at 1000 Mbps
Off Port 1 to 24: If the link is present, ports 1 to 24 are
operating at 10Mbps.
Port 25: The link has not been established.
6
Power/Self Test LED
The Power/Self test LED lights green when the unit is powered on
and ready for use.
Rear Panel Conne ctions
7
Power Supply
The Baseline 10/100 Switch 24 Port 10BASE-T/100BASE-TX plus
1-Port 1000BASE-T automatically adjusts to the supply voltage.
Only use the power cord that is supplied with the unit.
8
Socket for Redundant P ower 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 24 Port 10BASE-T/100BASE-TX
plus 1-Port 1000BASE-T is a Type 2 socket. For details, follow the
installation instructions in the guides that accompany the
Advanced RPS and the power module.
9
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 rece sses of the lower u nit.
I
NSTALLATION
R
ECOMMENDATIONS
Positioning the Switch
When deciding where to position the Baseline 10/100 Switch 24
Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T ensure:
It is accessible and cables can be connected easily.
Cabling is away from sources of electrical noise. These include
lift shafts, microwave ovens, and air conditioning units. Electromagnetic fields can interfere with the signals on copper
cabling and introduce errors, therefore slowing down your
network.
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 recommend that you provide
a minimum of 25mm (1in.) clearance).
The air is as free from dust as possible.
Temperature operating limits are not likely to be exceeded. It
is recommended that the unit is installed in a clean, air conditioned environment.
It is always good practice to wear an anti-static wrist
strap when installing network equipment, connected to a
ground point. If one is not available, try to keep in contact with a grounded rack and avoid touching the unit's
ports and connectors, if possible. Static discharge can
cause reliability problems in your equipment.
Rack Mounting or Free Standing
The unit can be mounted in a 19-inch equipment rack using the
Mounting Kit. Refer to “Mounting Kit Instructions” on page 4, or
it can be free standing. Do not place objects on top of the unit or
stack.
CAUTION: If installing the Baseline 10/100 Switch 24
Port 10BASE-T/100BASE-TX plus 1-Port 1000BASE-T in a
free standing 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.
3
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