3com 2848-sfp plus Guia Do Utilizador
Physical Features
9
WARNHINWEIS: 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.
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.
an diese Datensteckdosen angeschlossen werden.
The Switch has 44 10/100/1000 Mbps auto-negotiating
ports. Each port supports automatic MDI/MDI-X
detection and can be connected to either a 10BASE-T,
100BASE-TX, or a 1000BASE-T device.
ports. Each port supports automatic MDI/MDI-X
detection and can be connected to either a 10BASE-T,
100BASE-TX, or a 1000BASE-T device.
For each port, the speed and duplex mode (half duplex
or full duplex for 10BASE-T and 100BASE-TX, full duplex
only for 1000BASE-T) are automatically determined by
the capabilities of the connected device.
or full duplex for 10BASE-T and 100BASE-TX, full duplex
only for 1000BASE-T) are automatically determined by
the capabilities of the connected device.
CAUTION: The Switch supports full duplex
auto-negotiation. If auto-negotiation is disabled for
1000BASE-T, then the Switch uses the forced-mode
default of 100 full duplex mode. If the connected device
does not support auto-negotiation, the Switch will
operate in half duplex mode (even if the attached 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).
auto-negotiation. If auto-negotiation is disabled for
1000BASE-T, then the Switch uses the forced-mode
default of 100 full duplex mode. If the connected device
does not support auto-negotiation, the Switch will
operate in half duplex mode (even if the attached 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).
(2) Gigabit Combo Ports (RJ-45/SFP)
The Gigabit combo ports (RJ-45/Small Form Factor
Pluggable (SFP) ports) are numbered 45 to 48. If the link
connections on the Gigabit combo ports are active, the
associated RJ-45 port of the same number is disabled.
Pluggable (SFP) ports) are numbered 45 to 48. If the link
connections on the Gigabit combo ports are active, the
associated RJ-45 port of the same number is disabled.
The four SFP ports support fiber Gigabit Ethernet
short-wave (SX) and long-wave (LX) SFP transceivers in
any combination. This offers you the flexibility of using
SFP transceivers to provide connectivity between the
Switch and remote 1000 Mbps workgroups or to create
a high-capacity aggregated link backbone connection.
The default active port is the SFP port. The selection of
active ports can be configured via the Web interface.
short-wave (SX) and long-wave (LX) SFP transceivers in
any combination. This offers you the flexibility of using
SFP transceivers to provide connectivity between the
Switch and remote 1000 Mbps workgroups or to create
a high-capacity aggregated link backbone connection.
The default active port is the SFP port. The selection of
active ports can be configured via the Web interface.
The SFP port supports full duplex mode only.
SFP ports are numbered 45-48 on the Switch. When an
SFP port is active it has priority over the 10/100/1000
port of the same number. The corresponding
10/100/1000 port is disabled when an SFP link
connection is active.
SFP port is active it has priority over the 10/100/1000
port of the same number. The corresponding
10/100/1000 port is disabled when an SFP link
connection is active.
(3) Link/Activity Status LEDs
The following table lists LEDs visible on the front of the
Switch, and provides information on how to read their
status according to color.
Switch, and provides information on how to read their
status according to color.
Status
Meaning
Green
The link is operating at 1000 Mbps.
Yellow
The link is operating at 10 or 100 Mbps.