Cisco Systems VG350 specifications Distance Limitations for Interface Cables, Cable Types

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Chapter 3 Planning Your Installation

Distance Limitations for Interface Cables

Cable Types

The cable types that are used are dependent on the Cisco VG350 Voice Gateway that you are using. For more information, see the “Interfaces and Service Capabilities” section on page 1-3and “Cable Specifications and Information” section on page A-1.

GE cables (RJ-45 to RJ-45 straight-through cables)

Analog voice cables (RJ-21)

Distance Limitations for Interface Cables

When planning your installation, consider distance limitations and potential electromagnetic interference (EMI) as defined by the Electronic Industries Association (EIA). Distance limitation information is included for the following VG ports:

Gigabit Ethernet Maximum Distance, page 3-4

FXS Analog Voice Port Maximum Distance, page 3-4

FXS-E (Extended loop) Analog Voice Port Maximum Distance, page 3-4

Gigabit Ethernet Maximum Distance

The maximum segment distance for Gigabit Ethernet is 330 feet (100 meters) (specified in IEEE 802.3).

FXS Analog Voice Port Maximum Distance

The maximum distance is established by a total allowable loop resistance, including the phone or terminal equipment, of 600 ohms.

FXS-E (Extended loop) Analog Voice Port Maximum Distance

The maximum distance is established by a total allowable loop resistance, including the phone or terminal equipment, of 1400 ohms.

Note Typically, a 26 AWG wire is equal to 81.6 ohm/Kft and 24 AWG wire is equal to 51.3 ohm/Kft.

Cisco VG350 Voice Gateway Hardware Installation Guide

3-4

OL-25970-01

 

 

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Contents Americas Headquarters Cisco VG350 Voice Gateway Hardware Installation GuidePage N T E N T S Grounding Site Log Audience OrganizationChapter Title Description Convention Description ConventionsConservez CES Informations Safety WarningsBewaar Deze Instructies Säilytä Nämä OhjeetGuarde Estas Instruções Bewahren SIE Diese Hinweise GUT AUFConservare Queste Istruzioni TA Vare PÅ Disse InstruksjoneneSpara Dessa Anvisningar GEM Disse Anvisninger Xiii Xiv Related Documentation Obtaining DocumentationCisco.com Cisco Technical Support Website Documentation FeedbackObtaining Technical Assistance Ordering DocumentationDefinitions of Service Request Severity Submitting a Service RequestObtaining Additional Publications and Information USB OverviewAC OK VG350 Voice Gateway ChassisInterfaces and Service Capabilities Configuration OptionsSFP Color Description LED IndicatorsPhysical Description and LEDs LEDCF0/CF1 Specifications Description SpecificationSFP Transportation and Storage SD/EMI Configuration Connections Configuration MethodsSoftware Elements OL-25970-01 Cisco Double-Wide High Density Analog Service Modules FXS-E SM-D-72FXS SM-D-48FXS-EGrounding Installing SM-D-72FXSConnecting SM-D-48FXS-E Installing SM-D-48FXS-EBYPASS-0 Faceplate Label RJ-11 OUT RJ-11 Power on Power OFFFXO Fail-Over Bypass Ports FXOEN LED Cisco SM-D-72FXS Service Module SpecificationsCisco SM-D-48FXS-E Service Module Specifications Physical Description and LEDsOnline Insertion and Removal Port Numbering ConventionsInsertion Insertion and Removal StepsLocation and Mounting Requirements Temperature Control and VentilationChassis Grounding Access to ChassisPower Suppy Considerations Power SourceFXS Analog Voice Port Maximum Distance Distance Limitations for Interface CablesCable Types Gigabit Ethernet Maximum DistanceInterference Considerations OL-25970-01 Installing the Cisco VG350 Voice Gateway Maintaining Safety with Electricity Safety RecommendationsPage Safety Tips General Safety PracticesPreventing Electrostatic Discharge Damage Site LogKeeping Track-Checklist Installation ChecklistTask Verified by Date Unpacking and Inspection Mounting Tools and EquipmentOL-25970-01 Powering On the Cisco VG350 Voice Gateway Checklist for Power-OnPower-On Procedure Continue with the Troubleshooting section on Symptom Possible Cause Corrective Action TroubleshootingOL-25970-01 Console and Auxiliary Port Cables and Pinouts Cable Specifications and InformationDSR DTR CTS RTS Console Port to PCRTS CTS DTR DSR GNDFigure A-2 Console Port to Ascii Terminal-Cable and Adapter Console Port to Ascii TerminalDSR DCD CTS Auxiliary Port to ModemAlternative Connections to Terminal and Modem RTS DTRRX+ Pin SignalGigabit Ethernet Port Pinouts RJ-45 TX+Analog Voice Multiport Pinouts RJ-21X/CA21A Port Connector Pin Number SignalRing Tip 25, 50, 51
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