Specifications

18
Installation and Configuration Note for the Catalyst 4500 Series Supervisor Engine II-Plus TS
78-16551-01
SFP Guidelines
Note When using shorter distances of single-mode fiber cable, you might need to insert an inline optical
attenuator in the link to avoid overloading the receiver.
When the fiber-optic cable span is less than 15.43 miles (25 km), you should insert a 5-decibel (dB) or
10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the
1000BASE-ZX SFP module at each end of the link.
Fiber-optic SFP modules also use MT-RJ connectors, as shown in Figure 7.
Figure 7 MT-RJ Fiber-Optic SFP Module
1000BASE-T SFP Modules
Copper 1000BASE-T SFP modules use RJ-45 connectors, as shown in Figure 8.
Figure 8 1000BASE-T Copper SFP Module
1000BASE-T copper SFP modules used with the Catalyst 4500 series Supervisor Engine II-Plus TS
operate only in 1000BASE-T mode, or at 1000 Mbps. Copper 1000BASE-T SFP modules use standard
four twisted-pair, Category 5 cable at lengths up to 328.08 feet (100 meters).
CWDM SFPs
You can connect the CWDM SFPs to CWDM passive optical system optical add/drop multiplexer
(OADM) or multiplexer/demultiplexer plug-in modules using single-mode fiber-optic cables with
standard SC connectors. Figure 9 shows a CWDM SFP with the optical port dust plug removed.
Figure 10 shows an SC-type connector.
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