Datasheet

Data Sheet
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10 Gigabit Ethernet Uplinks and the Cisco TwinGig SFP Converter
The Cisco Catalyst 3750-E features wire-speed 10 Gigabit Ethernet uplink ports for high-bandwidth
applications, relieving congestion and ensuring smooth delivery of data. The TwinGig SFP
converter (see Figure 2) converts a 10 Gigabit Ethernet X2 interface into two Gigabit Ethernet SFP
ports. This way, customers can initially use the switch with Gigabit Ethernet uplinks and later
implement 10 Gigabit Ethernet uplinks as business demands change, without having to upgrade
the access layer.
Figure 2. Cisco TwinGig Adapter Converting 10 Gigabit Ethernet X2 Interface into Two Gigabit Ethernet
SFP Interfaces
Modular Power Supplies
The Cisco Catalyst 3750-E Series Switches have one power supply slot and support the following
power supplies. PoE switches require a PoE power supply. Data-only switches can operate with
any of the power supplies.
●
C3K-PWR-1150WAC: 12WAC power supply with 740W PoE
●
C3K-PWR-750WAC: 750WAC power supply for 24-port switch with 370W PoE
●
C3K-PWR-265WAC: 265WAC power supply for 48-port or 24-port switch without PoE
●
C3K-PWR-265WDC: 265WDC power supply for 48-port or 24-port switch without PoE
Maximum power availability for converged voice and data networks is attainable when a Cisco
Catalyst 3750-E Series Switch is combined with the Cisco RPS 2300 Redundant Power System for
transparent protection against internal power supply failures and an uninterruptible power supply
(UPS) system to safeguard against power outages. Using the RPS 2300 to provide backup power,
the Cisco Catalyst 3750-E Series Switch power supplies become hot swappable. Table 3 shows
the power supply compatibility matrix.
Power over Ethernet
The Cisco Catalyst 3750-E Series can provide a lower total cost of ownership for deployments that
incorporate Cisco IP phones, Cisco Aironet
®
wireless LAN (WLAN) access points, or any IEEE
802.3af-compliant end device. PoE removes the need for wall power to each PoE-enabled device
and eliminates the cost for additional electrical cabling and circuits that would otherwise be
necessary in IP phone and WLAN deployments. The Cisco Catalyst 3750-E 24-port PoE
configurations can support 24 simultaneous full-powered PoE ports at 15.4W for maximum
powered-device support. The Cisco Catalyst 3750-E 48-port PoE configurations can support 48
simultaneous full-powered PoE ports at 15.4W when using the optional 1150W power supply.