Product specifications

Data Sheet
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policies, reducing power consumption to realize increased cost savings, potentially affecting any
powered device.
EnergyWise encompasses a highly intelligent network-based approach to communicate messages
that measure and control energy between network devices and endpoints. The network discovers
Cisco EnergyWise manageable devices, monitors their power consumption, and takes action
based on business rules to reduce power consumption. EnergyWise uses a unique domain-
naming system to query and summarize information from large sets of devices, making it simpler
than traditional network management capabilities. Cisco EnergyWise’s management interfaces
allow facilities and network management applications to communicate with endpoints and each
other using the network as a unifying fabric. The management interface uses standard SNMP or
SSL to integrate Cisco and third-party management systems.
Cisco EnergyWise extends the network as a platform for power control plane for gathering,
managing, and reducing power consumption of all devices, resulting in companywide optimized
power delivery and reduced energy costs.
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.
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C3K-PWR-1150WAC: 1150WAC power supply with 800W PoE
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C3K-PWR-750WAC: 750WAC power supply for 24-port switch with 420W PoE
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C3K-PWR-265WAC: 265WAC power supply for 48-port or 24-port switch without PoE
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C3K-PWR-265WDC: 265WDC power supply for 48-port or 24-port switch without PoE