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Table 5

Specification

Wavelength

Cabling distance

(maximum)

SFP and GBIC Short Wavelength Modules

The 1000BASE-SX (short wavelength) GBIC module operates on standard multimode fiber-optic link

spans of up to 1804 feet (550 m). (See

The 100BASE-FX SFP module is a hot-swappable device that plugs into a Gigabit Ethernet SFP port. It

provides full-duplex 100-Mbps connectivity over multimode fiber (MMF) infrastructures. The

100BASE-FX SFP operates on ordinary MMF optical link spans of up to 1.2428 miles (2 km) in length.

SFP and GBIC Long Wavelength Modules

The 1000BASE-LX/LH (long wavelength/long haul) GBIC module interfaces fully comply with the

IEEE 802.3z 1000BASE-LX standard. However, their higher optical quality allows them to reach

6.2 miles (10 km) over single-mode fiber (SMF) versus the 3.1 miles (5 km) specified in the standard.

SFP and GBIC Extended Wavelength Modules

The 1000BASE-ZX (extended wavelength) GBIC module operates on ordinary single-mode fiber-optic

link spans of up to 43.5 miles (70 km). Link spans of up to 62.1 miles (100 km) are possible using

premium single-mode fiber or dispersion-shifted single-mode fiber (premium single-mode fiber has a

lower attenuation per unit length than ordinary single-mode fiber; dispersion-shifted single-mode fiber

has both lower attenuation and less dispersion).

The 1000BASE-ZX GBIC module must be coupled to single-mode fiber-optic cable, which is the type

of cable typically used in long-haul telecommunications applications. The 1000BASE-ZX GBIC module

will not operate correctly when coupled to multimode fiber, and it is not intended to be used in

environments where multimode fiber is frequently used (for example, building backbones, or horizontal

cabling).

The 1000BASE-ZX GBIC module is intended to be used as a Physical Medium Dependent (PMD)

component for Gigabit Ethernet interfaces found on various switch and router products. It operates at a

signaling rate of 1250 Mbaud, transmitting and receiving 8B/10B encoded data.

When shorter lengths of single-mode fiber are used, it may be necessary to insert an in-line optical

attenuator in the link to avoid overloading the receiver.

•

Gigabit Interface Converter (GBIC) Module and Small Form-Factor Pluggable (SFP) GBIC Module Installation Information and Specifications

OL-5067-08

SFP Module Specifications (continued)

Insert a 10-dB in-line optical attenuator between the fiber-optic cable plant and the receiving port

on the 1000BASE-ZX GBIC module at each end of the link whenever the fiber-optic cable span is

less than 15.5 miles (25 km).

Description

GLC-SX-MM: 850 nm

GLC-LH-SM: 1300 nm

GLC-ZX-SM: 1550 nm

GLC-GE-FX: 1300 nm

GLC-SX-MM: 1804 feet (550 m)

GLC-LH-SM: 6.2 miles (10 km)

GLC-ZX-SM: 43.5 to 62.1 miles (70 to 100 km)

GLC-GE-FX: 1.2428 miles (2 km)

Table

6.)

GBIC Module and SFP Module Overview