Cisco Systems WS-G5487, WS-G5484, WS-G5486 User Manual

Contents

Gigabit Interface Converter Installation Note

Product Numbers: WS-G5484(=), WS-G5486(=), WS-G5487(=)

This installation note provides the technical specifications and installation instructions for the Gigabit
Interface Converters (GBICs) that you install in the Catalyst 6000, Catalyst 5000, and Catalyst 4000
family Gigabit Ethernet ports that accept GBICs.

This publication consists of these sections:

• Overview, page 2

• Safety Overview, page 6

• Required Tools, page 8

• Installing the GBIC, page 8

• Removing a GBIC, page 10

• Standards Compliance Specifications, page 11

• Translated Safety Warnings, page 12

• Related Documentation, page 18

• Obtaining Documentation, page 18

• Obtaining Technical Assistance, page 19

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Overview

Overview

The GBIC is a hot-swappable input/output device that plugs into a Gigabit Ethernet port, linking the
module port with the fiber-optic network. There are two physical GBIC models available; one model
has a locking handle that secures the GBIC in the module; the other model uses two clips, one on each
side of the GBIC, that secure the GBIC in the module. GBICs are also available in three optical models.
The three optical models differ in the distance light can be sent through a fiber-optic network. The two
physical models are shown in Figure 1. The three optical models are listed in Table 1.

Figure 1 Physical GBIC Models

WS-G5484

Receiver

Transmitter

Table 1 is a list of the available GBIC optical models.

Table 1 GBIC Optical Models

GBIC Product Number

Short wavelength
(1000BASE-SX)

Long wavelength/long haul
(1000BASE-LX/LH)

Extended distance
(1000BASE-ZX)

The WS-G5484 GBIC (1000BASE-SX) operates on ordinary multimode fiber (MMF) link spans of up
to 1804 feet (550 meters) in length (See Table 5 on page 4).

Clip

Receiver

Transmitter

WS-G5484

WS-G5486

WS-G5487

Handle

51178

WS-G5486

Gigabit Interface Converter Installation Note

2

The WS-G5486 GBIC (1000BASE-LX/LH) interfaces fully comply with the IEEE 802.3z
1000BASE-LX standard. However, their higher optical quality allows them to reach 10 km over
single-mode fiber (SMF) versus the 5 km specified in 802.3z.

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WS-G5487

Overview

When using an LX/LH GBIC with a 62.5-micron diameter MMF,you must install a mode-conditioning
patch cord (CAB-GELX-625 or equivalent) between the GBIC and the MMF cable on both the transmit
and receive ends of the link in the following situations:

• Less than 328 feet (100 meters). When illuminating short lengths of MMF with an LX/LH GBIC,

the mode-conditioning patch cord reduces the amount of optical power coupled into the MMF.
Excessive power can saturate the LX/LH receiver causing an elevated bit error rate (BER).

• Greater than 984 feet (300 meters). When illuminating long lengths of MMF with an LX/LH GBIC,

the mode-conditioning patch cord offsets the laser light to reduce the possibility of differential
mode delay.

The WS-G5487 GBIC (1000BASE-ZX) operates on ordinary SMF link spans of up to 70 km in length.
Link spans of up to 100 km are possible using premium SMF or dispersion-shifted SMF (premium SMF
has a lower attenuation per unit length than ordinary SMF; dispersion-shifted SMF has both lower
attenuation per unit length and less dispersion).

The WS-G5487 GBIC must be coupled to SMF cable, which is the cable type typically used in
long-haul telecommunications applications. The WS-G5487 GBIC will not operate correctly when
coupled to MMF cable, and it is not intended to be used in application environments (e.g., building
backbones or horizontal cabling) where MMF is frequently used.

The WS-G5487 GBIC is intended to be used as a physical medium dependent (PMD) component for
Gigabit Ethernet interfaces. This GBIC operates at a signaling rate of 1250 MBaud, transmitting and
receiving 8B/10B encoded data.

When you have shorter distances of SMF, you might need to insert an in-line optical attenuator in the
link to avoid overloading the receiver:

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

on the WS-G5487 GBIC at each end of the link whenever the fiber-optic cable span is less than

15.5 miles (25 km).

• Insert a 5-dB in-line optical attenuator between the fiber-opticcable plant and the receiving port on

the WS-G5487 GBIC at each end of the link whenever the fiber-optic cable span is equal to or
greater than 15.5 miles (25 km) and less than 31 miles (50 km).

Note The maximum number of installed 1000BASE-ZX GBICs is limited in each Catalyst

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chassis. These limits fall within the emission specifications for these products. Table 2
lists the 1000BASE-ZX GBIC limits for the different Catalyst systems.

Table 2 Maximum Number of 1000BASE-ZX (WS-G5487) GBICs Per Platform

Platform Maximum number of 1000BASE-ZX GBICs

Catalyst 4000 family 12 to comply with EN55022 Class B and FCC Class A
Catalyst 5000 family 12 to comply with FCC Class A
Catalyst 6000 family 12 to comply with EN55022 Class B

24 to comply with FCC Class A

Gigabit Interface Converter Installation Note

3

Overview

Specifications

GBIC specifications are listed in Table 3. GBIC transmitter power and receiver sensitivity values are
listed in Table 4.

Table 3 GBIC Specifications

Specification Description

Dimensions (H x W x D) 0.39 x 1.18 x 2.56 inches

(1 x 3 x 6.5 cm)
Weight 1 ounce maximum (28.4 grams)
Connectors Multimode fiber-optic: SC

Single-mode fiber-optic: SC
Connector polishing SX — The SX GBIC uses ball lenses

and an air gap. A flat polish on the

fiber-optic interface connectors is

suggested.

LX/LH — Super Physical Contact

with a 20 micron radius

Table 4 GBIC Channel Insertion Loss

Specification 1000BASE-SX 1000BASE-LX/LH 1000BASE-ZX

Transmitter output power
(minimum/maximum)

Receiver maximum input power 0 dBm –3 dBm –3 dBm
Receiver sensitivity –17 dBm –19 dBm –23 dBm
Channel insertion loss

50 micron MMF 3.4 dB 4.4 dB N/A

62.5 micron MMF 3.2 dB 6 dB N/A
9 micron SMF N/A 6.5 dB 21.5 dB

Port Cabling Specifications

Table 5providescabling specificationsfor the GBICs that you install in the Gigabit Ethernet port. Note
that all GBIC ports have SC-type connectors, and the minimum cable distance for all GBICs listed
(MMF and SMF) is 6.5 feet (2 meters).

0/–9.5 dBm –3/–9.5 dBm 0/4.77 dBm

Gigabit Interface Converter Installation Note

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Table 5 GBIC Port Cabling Specifications

Overview

1

Bandwidth
(MHz/km) Cable Distance

GBIC

SX

Wavelength
(nm) Fiber Type

2

850 MMF 62.5 160 722 feet (220 meters)

Core Size
(micron)

(WS-G5484) 62.5 200 902 feet (275 meters)

50.0 400 1640 feet (500 meters)

50.0 500 1804 feet (550 meters)

Modal

LX/LH 1310 MMF

3

62.5 500 1804 feet (550 meters)

(WS-G5486) 50.0 400 1804 feet (550 meters)

50.0 500 1804 feet (550 meters)

SMF 8.3/9/10 – 6.2 miles (10 km)
ZX 1550 SMF 8.3/9/10 – 43.5 miles (70 km)
(WS-G5487) 8 – 62.1 miles (100 km)

1. The numbers given for multimode fiber-optic cable refer to the core diameter. For single-mode fiber-optic cable,

8.3 microns refers to the corediameter.The9-micron and 10-micron values refer to the mode-field diameter (MFD), which
is the diameter of the light-carrying portion of the fiber. This area consists of the fiber core plus a small portion of the
surrounding cladding. The MFD is a function of the core diameter, the wavelength of the laser, and the refractive index
difference between the core and the cladding.

2. Use with MMF only.

3. When using an LX/LH GBIC with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord
(CAB-GELX-625 or equivalent) between the GBIC and the MMF cable on both the transmit and receive ends of the link.
The mode-conditioning patch cord is required for link distances less than 328 feet (100 m) or greater than 984 feet (300 m).
The mode-conditioning patch cord prevents overdriving the receiver for short lengths of MMF and reduces differential
mode delay for long lengths of MMF.

4. Requires dispersion-shifted single-mode fiber-optic cable.

4

Note The mode-conditioning patch cord (CAB-GELX-625 or equivalent) is required to comply

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with IEEE standards. The IEEE found that link distances could not be met with certain
types of fiber-optic cable cores. The solution is to launch light from the laser at a precise
offset from the center by using the mode-conditioning patch cord. At the output of the
patch cord, the LX/LH GBIC is compliant with the IEEE 802.3z standard for
1000BASE-LX.

Gigabit Interface Converter Installation Note

5

Safety Overview

Safety Overview

Safety warnings appear throughout this publication in procedures that, if performed incorrectly, may
harm you. A warning symbol precedes each warning statement.

Warning

Waarschuwing

Varoitus

Attention

This warning symbol means danger. You are in a situation that could cause bodily
injury. Before you work on any equipment, be aware of the hazards involved with
electrical circuitry and be familiar with standard practices for preventing accidents.
To see translations of the warnings that appear in this publication, refer to the
"Translated Safety Warnings" section in this document.

Ditwaarschuwingssymbool betekent gevaar.U verkeertineen situatie dielichamelijk
letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich
bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de
hoogte te zijn van standaard maatregelen om ongelukken te voorkomen. Voor
vertalingen van de waarschuwingen die in deze publicatie verschijnen, kunt u het
gedeelte “Translated Safety Warnings” (Vertalingen van veiligheidsvoorschriften)
raadplegen in dit document.

Tämä varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa
ruumiinvammaan. Ennen kuin työskentelet minkään laitteiston parissa, ota selvää
sähkökytkentöihin liittyvistä vaaroista ja tavanomaisista onnettomuuksien
ehkäisykeinoista. Tässä julkaisussa esiintyvien varoitusten käännökset löydät tämän
asiakirjan "Translated Safety Warnings" (käännetyt turvallisuutta koskevat
varoitukset).

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation
pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un
équipement, soyez conscient des dangers posés par les circuits électriques et
familiarisez-vousavecles procédures courammentutiliséespour éviter lesaccidents.
Pour prendre connaissance des traductions d’avertissements figurant dans cette
publication, consultez la section « TranslatedSafety Warnings » (Traduction des avis
de sécurité) de ce document.

6

Warnung

Avvertenza

Gigabit Interface Converter Installation Note

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer
Körperverletzung führen könnte. Bevor Sie mit der Arbeit an irgendeinem Gerät
beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren
und der Standardpraktiken zur Vermeidung von Unfällen bewußt. Übersetzungen der
in dieser Veröffentlichung enthaltenen Warnhinweise finden Sie im Abschnitt
“Translated Safety Warnings” (Übersetzung der Warnhinweise) in diesem Dokument.

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare
infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre
conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche
standard per la prevenzione di incidenti. La traduzione delle avvertenze riportate in
questa pubblicazione si trova nella documento “Translated Safety Warnings”
(Traduzione delle avvertenze di sicurezza) nel presente documento.

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