18 Small form factor pluggable transceivers3 If the media is optical fiber, determine any wavelength restrictions orrequirements.To expand available bandwidth on a common optical fiber, useCWDM SFPs.4 Determine if digital diagnostic monitoring (DDM) is required.Not all SFPs or products support DDM.5 Use the following job aids to determine the appropriate SFP for yourapplication.—End—Procedure job aid: SFPs and common applicationsThe following table describes the reach provided by various SFPs. Thistable is informational only—not all Nortel Ethernet switching and routingproducts support all the SFPs listed here.SFPs and common applicationsSFP model Common application1000BASE-T Lowest-cost Gigabit Ethernet solution. Up to 100 m reach over Category 5(CAT5) unshielded twisted pair (UTP).1000BASE-SX Well-suited for campus local area networks (LAN) and intrabuilding links.Up to 275 or 550 m reach (fiber-dependent) over a fiber pair.1000BASE-LX Up to 10 km reach over a single mode fiber (SMF) pair. Up to 550 m reachover a multimode fiber (MMF) pair.1000BASE-XD Up to 40 km reach over a single mode fiber pair.1000BASE-ZX Up to 70 km reach over a single mode fiber pair.1000BASE-BX Up to 10 km reach. Bidirectional over one single mode fiber.1000BASE-EX Up to 120 km reach over a single mode fiber pair.1000BASE-LRM Up to 300 m reach over FDDI-grade 62.5 μm multimode fiber. Suited forcampus LANs.Procedure job aid: SFP models without DDI supportSFPs are hot-swappable input/output enhancement components designedfor use with Nortel products to allow Gigabit Ethernet ports to link with otherGigabit Ethernet ports over various media types.The SFPs described in this section do not have Digital Diagnostic Interfacecapability, and are RoHS -E5 compliant.Nortel Ethernet Routing Switch 5500 SeriesInstallation — SFPsNN47200-302 03.01 Standard5.1 27 August 2007Copyright © 2007, Nortel Networks.