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Cisco CGS 2520 Hardware Installation Guide
OL-31444-01
Chapter 1 Product Overview
Ports
Note The output of the PoE+ circuit has been evaluated as a Limited Power Source (LPS) per IEC 60950-1.
Dual-Purpose Gigabit Ethernet Ports
You can configure the dual-purpose ports on the switch as either 10/100/1000 ports or as SFP module
ports. You can set the 10/100/1000 ports to autonegotiate, or you can configure them as fixed 10, 100,
or 1000 Mb/s (Gigabit) Ethernet ports.
By default, the switch selects the medium for each dual-purpose port (10/100/1000BASE-T or SFP).
When a link is achieved on one media type, the switch disables the other media type until the active link
goes down. If links are active on both media, the SFP module port has priority, but you can use the
media-type interface configuration command to manually designate the port as an RJ-45 port or an SFP
port.
You can configure the speed and duplex settings consistent with the selected media type. For information
on configuring interfaces, see the CGS 2520 Switch Software Configuration Guide on Cisco.com.
For more information on the SFP module ports see:
• SFP Modules, page 1-5
• SFP Module Patch Cable, page 1-6

SFP Modules

The switch Ethernet SFP modules provide connections to other devices. These field-replaceable
transceiver modules provide the uplink interfaces.The modules have LC connectors for fiber-optic
connections or RJ-45 connectors for copper connections. You can use any combination of the supported
SFP modules listed in Tabl e 1- 2.