3Com 3C16465B - SuperStack 3 Baseline Switch Podręcznik użytkownika - Strona 2

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

Front Panel

24 RJ-45 10/100 Ports and 1 RJ-45 1000 Port
1
WARNING
: RJ-45 ports. These are shielded RJ-45 data
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. Il s'agit de prises
femelles blindées de données RJ-45. Vous ne pouvez pas
les utiliser comme prise de téléphone. Branchez unique-
ment 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, peu-
vent être branchés à ces prises de courant de données.
WARNUNG: RJ-45-Anschlüsse. Dies sind abgeschirmte
RJ-45-Datenbuchsen. Sie können nicht als Telefon-
anschlußbuchsen 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 wer-
den.
10BASE-T/100BASE-TX Ports
The Baseline 10/100 Switch has 12 (3C16464B) or 24 (3C16465B)
10/100Mbps auto-negotiating ports.
Ports 1-11 (3C16464B) or 1–23 (3C16465B) 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 cable.
Port 12 (3C16464B) or 24 (3C16465B) is 'switch selectable'
MDI/MDIX using the MDI switch, as described in 2. Using this
port, you can connect to any other device without the need for
'cross-over' cable.
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 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.
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
U
B
SE THE
10/100 S
ASELINE
device. Each port can be connected to either a 10BASE-T or a
100BASE-TX device.
f you connect two Baseline 10/100 Switch units together,
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
!
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).
To connect the Baseline 10/100 Switch to a SuperStack 3 hub
using a normal 'straight through' cable, connect any port on the
Baseline 10/100 Switch 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 use 'cross-over' TP cable to connect any MDIX port on
the Baseline 10/100 Switch to any MDIX port on a hub.
MDI Switch
2
This switch affects port 12 (3C16364B) or port 24 (3C16465B):
MDIX
MDI
2
WITCH
Out
Port 12 or 24 is an MDIX port.
It can be connected to a device with an MDI port (such
as a workstation) using a normal 'straight through' TP
cable.
In
Port 12 or 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.