Cisco 1000BASE-T, 1000BASE-SX, 1000BASE-LX-LH, 1000BASE-ZX, 1000BASE-CWDM User Manual
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Data Sheet
Cisco Gigabit Interface Converter
The industry-standard Cisco® Gigabit Interface Converter (GBIC) is a hot-swappable input/output device
that plugs into a Gigabit Ethernet port or slot, linking the port with the network. Cisco GBICs can be
interchanged on a wide variety of Cisco products and can be intermixed in combinations of 1000BASE-T,
1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, 1000BASE-CWDM, or 1000BASE-DWDM interfaces
on a port-by-port basis.
As additional capabilities are developed, these modules make it easy to upgrade to the latest interface technology,
maximizing investment protection. Figure 1 shows three Cisco GBIC models.
Figure 1. Cisco Gigabit Interface Converters
Cisco 1000BASE-T GBIC
The Cisco 1000BASE-T GBIC (product number WS-G5483) connects a GBIC port to Category 5 wiring using a
standard RJ-45 interface. The maximum Category 5 wiring distance is 328 feet (100 meters).
Cisco 1000BASE-SX GBIC
The Cisco 1000BASE-SX GBIC (WS-G5484) operates on legacy multimode fiber (MMF) optic link spans up to 1815
feet (550 m) and on laser-optimized multimode fiber (OM3) optic link spans up to 3281 feet (1 km).
Cisco 1000BASE-LX/LH GBIC
The Cisco 1000BASE-LX/LH GBIC (WS-G5486) fully complies with the IEEE 802.3z 1000BASE-LX10 standard. It
allows for reaches up to 6.2 miles (10 km) over single-mode fiber (SMF) and up to 550 meters over multimode fiber
(MMF). Note the requirements for mode conditioning patch (MCP) cords when coupled over legacy MMF:
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/product_bulletin_c25-530836.html.
Also note Cisco may support links up to 2 kilometers over legacy MMF in some deployment cases:
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/prod_bulletin0900aecd80425a37.html.
Cisco 1000BASE-ZX GBIC
The Cisco 1000BASE-ZX GBIC (WS-G5487) operates on ordinary single-mode fiber optic link spans up to 43.4
miles (70 km) long. Link spans of up to 62 miles (100 km) are possible using premium single-mode fiber or
dispersion shifted single-mode fiber. The GBIC provides an optical link budget of 21 dB - the precise link span length
will depend on multiple factors such as fiber quality, number of splices, and connectors.
© 2010 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 1 of 1
Data Sheet
When shorter distances of single-mode fiber are used, it might be necessary to insert an in-line optical attenuator in
the link to avoid overloading the receiver:
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A 5-dB or 10-dB inline optical attenuator should be inserted between the fiber-optic cable plant and the
receiving port on the Cisco 1000BASE-ZX GBIC at each end of the link whenever the fiber-optic cable span is
less than 15.5 miles (25 km)
Platform Support
Cisco GBICs are supported across a variety Cisco switches, routers, and optical transport devices. For more details,
see the document
Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix.
Connectors and Cabling
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Dual SC/PC connector (for optical GBIC modules)
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RJ-45 connector (for 1000BASE-T GBIC)
Note: For optical GBIC modules, only connections with patch cords with PC or UPC connectors are supported.
Patch cords with APC connectors are not supported. All cables and cable assemblies used must be compliant with
the standards specified in the standards section.
Note: Optical patch cables need to be compliant with GR-326 (single-mode) or GR-1435 (multimode).
Technical Specifications
Table 1 provides cabling specifications for the Cisco GBICs that you install in the Gigabit Ethernet port. Note that all
Cisco GBICs have SC-type connectors, and the minimum cable distance for all GBICs listed (MMF and SMF) is 6.5
feet (2 m).
Table 1. Cisco GBIC Port Cabling Specifications
GBIC Wavelength (nm) Fiber Type Core Size (Micron) Modal Bandwidth
Cisco 1000BASE-SX 850 MMF 62.5
62.5
50.0
50.0
50.0
Cisco 1000BASE-LX/LH 1310 MMF* 62.5
50.0
50.0
SMF 9/10 N/A 6.2 miles (10 km)
Cisco 1000BASE-ZX 1550 SMF 9/10 N/A 43.4 to 62 miles (70 to
(MHz/km)***
160
200
400
500
2000
500
400
500
* Mode-conditioning patch cord is required over legacy MMF and should not be used over OM3.
** Cisco 1000BASE-ZX GBIC can reach up to 62 miles (100 km) by using dispersion shifted SMF or low-attenuation SMF; the
distance depends on fiber quality, number of splices, and connectors.
*** Specified at transmission wavelength.
Cable Distance
722 ft (220 m)
902 ft (275 m)
1640 ft (500 m)
1804 ft (550 m)
3281 ft (1000 m)
1804 ft (550 m)
1804 ft (550 m)
1804 ft (550 m)
100 km)**
Standards
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Compatible with GBIC standard as specified in IEEE 802.3z
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Compliant with GBIC Specification Revision 5.4
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GR-20-CORE: Generic Requirements for Optical Fiber and Optical Fiber Cable
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GR-326-CORE: Generic Requirements for Single-Mode Optical Connectors and Jumper Assemblies
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