3Com 7000 manual Example, Type of Insertion Loss

Page 114

114APPENDIX D: CABLING REQUIREMENTS

Table 27 Insertion Losses for Mating Unlike Fiber Types - Transmitting Fiber

Receiving

Numerical

 

 

 

 

 

 

Fiber Size

Aperture

50 µ m

50 µ m

62.5 µ m

85 µ m

100 µ m

 

 

 

 

 

 

 

 

 

 

0.20

0.22

0.275

0.26

0.29

 

50 µm

0.20

0.0

0.4

2.2

3.8

5.7

 

50 µm

0.22

0.0

0.0

1.6

3.2

4.9

 

62.5 µm

0.275

0.0

0.0

0.0

1.0

2.3

 

85 µm

0.26

0.0

0.0

0.1

0.0

0.8

 

100 µm

0.29

0.0

0.0

0.0

0.0

0.0

 

 

 

 

Table 28 Typical Losses for Typical Connectors, Cables, and Splices

 

 

 

 

 

 

 

 

 

Type of Insertion

 

Loss

 

 

 

 

 

 

 

 

 

 

 

 

SC connector

 

 

.6 dB

 

 

 

 

ST connector (ceramic)

 

.6 dB

 

 

 

 

ST connector (plastic)

 

1.0 dB

 

 

 

 

ST connector (stainless steel)

 

.7 dB

 

 

 

 

62.5/125 cable

 

 

1.0 to 3.0 dB maximum per km, depending

 

 

 

on cable quality (nominal 2.0 dB)

 

 

8/125 cable

 

 

.5 dB/km (AT&T Lightguide)

 

 

Bypass switch (currently not

 

2.5 dB maximum

 

 

 

available in single mode)

 

 

 

 

 

 

Fusion splice

 

 

1 to 3 dB depending on type used (use .3 dB)

 

 

 

 

 

 

 

 

Example

Suppose that a link consisting of one km of 62.5/125 fiber with a maximum attenuation rating of 1.75 dB/km is transmitting into one km of 50/125 fiber with a maximum attenuation rating of 3 dB/km. The fibers are joined using a fusion splice rated at 0.3 dB and the link contains one in-line ST connector rated at 0.6 dB.

The following calculation would arrive at the link loss attenuation value for this linked fiber:

62.5µ m

+ 50µ m

+ splice

+ ST con-

+ insertion

= Total link

cable loss

cable loss

loss

nector loss

loss*

attenuation

1 km(1.75

+1 km(3

+0.3 dB

+0.6 dB

+2.2 dB

=7.85 dB

dB/km)

dB/km)

 

 

 

 

* for mating unlike fiber types

Image 114
Contents Software Version 4.55 Base and Extended 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Installing and Connecting Corebuilder Modules Configuring the Corebuilder 7000 Family ATM Switch Troubleshooting Glossary 3COM Corporation Limited Warranty Page Information About this GuideFinding Specific This GuideConventions Icon DescriptionConvention Description CoreBuilder Family ATM Switch Documents DocumentationCoreBuilder 7000 Family ATM Switches Operations Guide Document 3Com Part NumberMap If you want to ReadComments YearCompliance Overview Overview Component SummaryInstallation Stage Chapter Interface ModuleFans Stage Chapter Overview Unpacking Family ATM SwitchUnpacking Instructions CoreBuilderUnpacking Instructions Family ATM Switch Safety PrecautionsVorsichtsmaßnahm en Mesures de sécuritéTable Top InstallationPreparation As shippedPreparation For installation Universal Mounting Hole Pattern Family ATM Switch Core Builder Modules Power Supply Installing a Power To install a power supply module Supply ModuleSwitch Module Module to ensure operation should the main switch moduleModule, see in the Operations Guide Module Setting up Switch Module Redundancy Redundancy You should see the following displayGeneral Description of the Procedure Preparatory StepsProcedure Execution Hardware Redundancy Setup NMS-Based Lane Redundancy SetupVerifying Lane Redundancy Setup Lecs Elan database does not transfer automaticallyInstalling and Connecting Corebuilder Modules Port Interface Module ATM Interface Daughter CardsShows the E-3 daughter card Port ATM Interface Module Fan Tray Connecting toSwitch to different types of network devices Network DevicesFiber Optic Power Budget of 3Com Products OC-3 SMCoreBuilder SM-1300 SDX-1155B ATM port MM-820 15.1 Selecting a Power Cord Plugging in the Unit POWER-ON System StatesHow they are indicated on the LED display I L Color Description SourcePort Interface Module LEDsList the permanent 4-port interface module panel LEDs Link Status Color Description LOSPOWER-ON Logging in to Configuring Corebuilder 7000 Family ATM SwitchLogin screen appears Topics covered in this chapter includeSetup Integrated FastChassis-oriented Setup Chassis-wide VLANsFull Setup Mode Switch Setup ModeSetup Mode Selection Setting Special Parameters Setup Section DescriptionSections Default Parameter Values Following message appears on the screenType To Go Pnni is available in version 4.5 extended only Pnni Parameters Enter Pnni Node Level 0 to 104 Factory default is Your choice is displayedAs in , select the capacity of Bank Configuring the Corebuilder 7000 Family ATM Switch Pnni is available in version 4.5 extended only Configuring the Corebuilder 7000 Family ATM Switch Integrated Fast Setup Configuring the Corebuilder 7000 Family ATM Switch Following shows a typical virtual network configuration Type To performEthernet port Belongs To VN # 1-17 Integrated Fast Setup Integrated Fast Setup configures a minimum set of network Additional SwitchConfiguration Some additional configuration tasks might beConfiguring a PVC Configuring SVCsConfiguring Network Prefix and ATM Addresses Configuring Clock SynchronizationMenu Option Path Description VPI/VCIStoring RetrievingParameters Configuring the Corebuilder 7000 Family ATM Switch SYS\ 3 LOA \6 TCU Following messages are displayed for each data type Loading a Single Configuration Data TypeEnter the name of the file to receive the data on disk Upload status is displayed as followsFor loading a single item you can enter a full file name Loading the Other Data TypeConfirm the download Download status is displayed as follows Utility Batch file nameFollowing methods System is now in operational mode Method 1 Shift OMethod 2 dbgoff.bat Migrating from E-IISP to Pnni Redundancy Corebuilder 7000 Family ATM Switch Redundant Power SupplyTypes of Power Supplies CoreBuilder 7000 family power supplies are shown in Table Load SharingOverloading Port and 8-port ATM Interface Cards ATM Physical ModulesCoreBuilder 720X Ethernet/ATM Interface Card CoreBuilder 74XX Ethernet/ATM Interface Card CoreBuilder 76XX Fast Ethernet Interface CardData Closet Ethernet ATM Data Center with high-density Fast EthernetProviding Redundancy for Various Power Loads Other applicationsPower Supply 90A AC Power Supply Specifications 40A DC Power SupplyParameter Channel Heat Dissipation W Heat Dissipation BTU Troubleshooting Problem Recommended ActionFamily ATM switch power supply Power SupplyTroubleshooting Problem Possible Cause Recommended ActionSafety Precautions for Fiber Optics Connectors Procedure ActionTroubleshooting Switching Module Specifications Standards supported Power SupplyCoreBuilder Management and Interface LEDs Switch Module Interface CardCoreBuilder Management and Interface Connectors InterfacesPage Safety Information Bodily HarmDommages KörperlicheSchäden CorporelsSchäden am Gerät Appendix B Safety Information Site Requirements RequirementsRecommendations Wiring ClosetThermal ConsiderationsLocation codes or some type of floor grid matrix Ambient temperature and humidityDistribution Rack Distribution rack refer to FigureAppendix C Site Requirements Installing New Cabling If you are installing new cabling, follow these guidelinesCabling Requirements Accordingly ATM CablingJumper location, and any additional information Used at the siteFiber optic cable Dirt on the Fiber Optic LensDamaged Transceiver Due to Excessive Insertion Force Comparing Fiber to Specifications Specification DescriptionNumerical Aperture Example Type of Insertion LossMHz km / xkm = y MHz MHz km / 2 km = 250 MHzCategory Specifications Descriptions Single Mode Fiber Specifications Category Output power Mixed Fibers combination CoreBuilder 7000 Serial Port Serial Port PinoutsPin Signal Meaning Pin Male Pin FemaleCoreBuilder 7000 Serial Port To Modem Port Pin Male Appendix D Cabling Requirements Technical Support ServicesServices Online TechnicalHours a day, 7 days a week Access by Analog ModemUsername anonymous Country Data Rate Telephone NumberAccess by Digital Modem 847 262408 727 Europe, South Africa, and Middle East Country Telephone Number Asia, Pacific RimCountry Telephone Number Fax Number Appendix E Technical Support Glossary Glossary Glossary Communications Glossary Glossary Glossary OAM Channel Glossary Glossary Glossary Index PVC Hardware kit LES Fast 56 setup mode full UNI Setup 39 virtual LAN Index 3Com Corporation Limited Warranty Warranties Exclusive
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7000 specifications

The 3Com 7000 is a robust and versatile networking solution designed to meet the demands of enterprise environments. Renowned for its reliability and scalability, the 3Com 7000 is highly suitable for organizations requiring efficient data handling and enhanced network performance. This multi-layer switching platform integrates advanced technologies, making it a preferred choice for modern businesses.

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