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

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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.

Contents

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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78-5399-03 Rev. A0

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

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

 

Clip

Receiver

Handle

Transmitter

Receiver

 

Transmitter

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

51178

Table 1

GBIC Optical Models

 

 

 

 

GBIC

 

Product Number

 

 

Short wavelength

WS-G5484

(1000BASE-SX)

 

 

 

Long wavelength/long haul

WS-G5486

(1000BASE-LX/LH)

 

 

 

Extended distance

WS-G5487

(1000BASE-ZX)

 

 

 

 

WS-G5484

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).

WS-G5486

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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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.

WS-G5487

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-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 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 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

 

 

 

 

 

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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

0/–9.5 dBm

–3/–9.5 dBm

0/4.77 dBm

(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 5 provides cabling specifications for 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).

 

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Overview

Table 5

GBIC Port Cabling Specifications

 

 

 

 

 

 

 

 

 

 

 

 

 

Core Size1

Modal

 

 

 

Wavelength

 

Bandwidth

 

GBIC

 

(nm)

Fiber Type

(micron)

(MHz/km)

Cable Distance

 

 

 

 

 

 

 

SX2

 

850

MMF

62.5

160

722 feet (220 meters)

(WS-G5484)

 

 

62.5

200

902 feet (275 meters)

 

 

 

 

50.0

400

1640 feet (500 meters)

 

 

 

 

50.0

500

1804 feet (550 meters)

 

 

 

 

 

 

 

LX/LH

 

1310

MMF3

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

4

 

 

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 core diameter. The 9-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.

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

 

 

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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 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.

Waarschuwing Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk 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.

Varoitus 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).

Attention 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-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions d’avertissements figurant dans cette publication, consultez la section « Translated Safety Warnings » (Traduction des avis de sécurité) de ce document.

Warnung 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.

Avvertenza 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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