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Megabit Modem CRA-CUser ManualPowe r10BASE-TADSLManual Number: 425-613-150-02

About the Megabit Modem CRA-C2 Megabit Modem CRA-C User ManualUse the Megabit Modem CRA-C with these other PairGain products:•Megabit Modem CRA (at su

About the Megabit Modem CRA-CMegabit Modem CRA-C User Manual 3The Megabit Modem CRA-C can be set to any one of three modes thatdetermine how the data

About the Megabit Modem CRA-C4 Megabit Modem CRA-C User ManualReach, Data Rate, SNR Margin, and Noise EnvironmentThe maximum transmission rate of the

About the Megabit Modem CRA-CMegabit Modem CRA-C User Manual 5Figure 1. Reach for a Rate Adaptive ADSL Megabit Modem

About the Megabit Modem CRA-C6 Megabit Modem CRA-C User Manual

Megabit Modem CRA-C User Manual 7INSTALL THE MEGABIT MODEM CRA-CInstall the Megabit Modem CRA-C using these sections:For information about this topic

Install the Megabit Modem CRA-C8 Megabit Modem CRA-C User ManualTable 1. Cables for Megabit Modem CRA-CItem Description FunctionStraight-throughCateg

Install the Megabit Modem CRA-CMegabit Modem CRA-C User Manual 9Identify LEDs and ConnectorsThe Megabit Modem CRA-C front panel has LEDs that show sta

Install the Megabit Modem CRA-C10 Megabit Modem CRA-C User ManualTable 2. Front Panel LEDsLED Mode DescriptionPower Green Indicates power is on.10BAS

Install the Megabit Modem CRA-CMegabit Modem CRA-C User Manual 11Rear PanelFigure 3 and Table 3 describe the Megabit Modem CRA-C rear panel features.F

ii Megabit Modem CRA-C User ManualMegabit Modem CRA-C User ManualP/N 425-613-150-02Revision 02May 1998Copyright © 1998. PairGain Technologies, Inc.

Install the Megabit Modem CRA-C12 Megabit Modem CRA-C User ManualInstall the Megabit Modem CRA-CComplete the steps in the order listed to install the

Install the Megabit Modem CRA-CMegabit Modem CRA-C User Manual 13Table 4. ADSL Pin Assignments for RJ-45 ConnectorPin Signal1 Not Used2 Not Used3 Not

Install the Megabit Modem CRA-C14 Megabit Modem CRA-C User ManualFigure 5. Straight-through and Cross-over Cable Pinouts

Install the Megabit Modem CRA-CMegabit Modem CRA-C User Manual 15Connect to the data network using either the black straight-through cable or theyello

Install the Megabit Modem CRA-C16 Megabit Modem CRA-C User ManualPower Up and Check LEDsInstall the power cable and power up the Megabit Modem CRA-C:1

Megabit Modem CRA-C User Manual 17CONFIGURE AND VIEW STATUSIn this chapter, you configure the Megabit Modem CRA-C or view systemstatus using an ASCII

Configure and View Status18 Megabit Modem CRA-C User ManualFigure 7. Connecting to an ASCII Terminal4 Configure these communication settings for the

Configure and View StatusMegabit Modem CRA-C User Manual 19How to Log On and Navigate the MenusThis section shows you how to log on and then how to na

Configure and View Status20 Megabit Modem CRA-C User Manual is the factory-default password. If youestablish a different password, you must type the

Configure and View StatusMegabit Modem CRA-C User Manual 21Figure 8 shows the structure for the Megabit Modem CRA-C menus. Type thenumber of the menu

Megabit Modem CRA-C User Manual iiiFCC NOTICEThis equipment has been tested and found to comply with the limits for aClass B digital device, pursuant

Configure and View Status22 Megabit Modem CRA-C User ManualTable 6 shows the ASCII terminal key functions used to navigate the menusand to select sett

Configure and View StatusMegabit Modem CRA-C User Manual 23How to Configure a Remote UnitFrom the Megabit Modem CRA-C, you can view system parameters

Configure and View Status24 Megabit Modem CRA-C User ManualConfigure the System SettingsThis section describes configurable system settings. You can

Configure and View StatusMegabit Modem CRA-C User Manual 253 Do the following for each system setting option you wantto change:Type the number of the

Configure and View Status26 Megabit Modem CRA-C User ManualConfigure the ADSL TransceiverThe ADSL menu provides access to set ADSL configuration param

Configure and View StatusMegabit Modem CRA-C User Manual 272Do the following for each system setting option you wantto change:•Type the number of the

Configure and View Status28 Megabit Modem CRA-C User ManualTable 8. ADSL Transceiver Options (continued)TypeNo.For Option Function3* Max DownData Rat

Configure and View StatusMegabit Modem CRA-C User Manual 29Reset the ADSL TransceiverWhen you change any of the options 1 through 4 at the ADSL Menu,

Configure and View Status30 Megabit Modem CRA-C User ManualConfigure the Bridge/RouterThis section describes how to configure the Ethernet interface (

Configure and View StatusMegabit Modem CRA-C User Manual 31Configure as a BridgeConfigure Bridge parameters at the Bridge/Router Menu. Bridge configu

iv Megabit Modem CRA-C User ManualDECLARATION OF CONFORMITYManufacturer’s namePairGain Technologies, Inc.and address:14402 Franklin AveTustin, CA 9278

Configure and View Status32 Megabit Modem CRA-C User ManualTable 10. Bridge ConfigurationTypeNo.For Option Function2 Local IP Addr Configure for the

Configure and View StatusMegabit Modem CRA-C User Manual 33Table 10. Bridge Configuration (continued)TypeNo.For Option Function9 Image FileNameRead-o

Configure and View Status34 Megabit Modem CRA-C User ManualConfigure as a RouterConfigure Router parameters at the Bridge/Router Menu. Router configu

Configure and View StatusMegabit Modem CRA-C User Manual 35The following screen shows configuration for a Megabit ModemCRA (ATU-R) routed toward a Meg

Configure and View Status36 Megabit Modem CRA-C User ManualTable 11. Router ConfigurationTypeNo.ForOptionFunction2 Default Contains the address of th

Configure and View StatusMegabit Modem CRA-C User Manual 37Table 11. Router Configuration (continued)TypeNo.For Option FunctionC Image FileNameRead-o

Configure and View Status38 Megabit Modem CRA-C User ManualConfigure SNMPConfigure SNMP parameters and trap addresses at the SNMPConfiguration menu.1

Configure and View StatusMegabit Modem CRA-C User Manual 39Table 12. SNMP Configuration OptionsNo. For Option Function1 SNMP ReadOnly CommStringProvi

Configure and View Status40 Megabit Modem CRA-C User ManualReset the Ethernet BridgeChanges you make to the Ethernet bridge through the Bridge/RouterC

Configure and View StatusMegabit Modem CRA-C User Manual 41View StatusThis section describes status menus. You can view information such as currental

Megabit Modem CRA-C User Manual vUSING THIS MANUALThis manual helps you:•understand the features of the PairGain® Megabit Modem™ CRA-Cand how the unit

Configure and View Status42 Megabit Modem CRA-C User ManualADSL Transceiver StatusFrom the Main Menu, type to display the ADSL Menu.07/02/97

Configure and View StatusMegabit Modem CRA-C User Manual 43ADSL Performance Status. The ADSL Performance Status screen isupdated every second and pro

Configure and View Status44 Megabit Modem CRA-C User ManualTable 13. ADSL Performance Status Screen FieldsField MeaningDown Alarms Identifies the cur

Configure and View StatusMegabit Modem CRA-C User Manual 4524 Hours ADSL Performance History. The 24 Hour ADSL PerformanceHistory report consists of

Configure and View Status46 Megabit Modem CRA-C User Manual7 Days ADSL Performance History. The 7 Day ADSL PerformanceHistory menu displays the ES an

Configure and View StatusMegabit Modem CRA-C User Manual 47ADSL Alarm History. The ADSL Alarm History screen consists of fivecolumns. Table 14 descr

Configure and View Status48 Megabit Modem CRA-C User ManualEthernet Bridge StatisticsThe Megabit Modem CRA-C provides real-time, non-disruptive monito

Configure and View StatusMegabit Modem CRA-C User Manual 49Table 15. Bridge Statistics FieldsField DefinitionEthernet PortInput Frames The number of

Configure and View Status50 Megabit Modem CRA-C User Manual

Megabit Modem CRA-C User Manual 51NETWORK AND MANAGEMENT OVERVIEWThrough the console menus, you can configure the Megabit Modem CRA-Cas a bridge to fo

Using This Manualvi Megabit Modem CRA-C User Manual

Network and Management Overview52 Megabit Modem CRA-C User ManualFigure 9. Spanning Tree Topology

Network and Management OverviewMegabit Modem CRA-C User Manual 53You can enable or disable Spanning Tree on the Bridge/Router ConfigurationMenu. The

Network and Management Overview54 Megabit Modem CRA-C User ManualFigure 10. Simple Configuration for Static IP Routing

Network and Management OverviewMegabit Modem CRA-C User Manual 55Figure 11 shows a more complex example of multiple gateways that usestatic IP routing

Network and Management Overview56 Megabit Modem CRA-C User ManualWhen you configure the static IP routing feature, set the parameters defined inTable

Network and Management OverviewMegabit Modem CRA-C User Manual 57Table 18. External Router Static Route EntryParameter DefinitionStatic RouteEntry in

Network and Management Overview58 Megabit Modem CRA-C User ManualFigure 12 shows an example of a point-to-point ADSL system and hypotheticalvalues of

Network and Management OverviewMegabit Modem CRA-C User Manual 59Megabit Modem CRA-C IP AddressesThe Megabit Modem CRA-C has two IP addresses, one for

Network and Management Overview60 Megabit Modem CRA-C User ManualFigure 13. IP Addresses

Network and Management OverviewMegabit Modem CRA-C User Manual 61Management ProtocolsSNMP is used for configuring system and bridge parameters, monito

Megabit Modem CRA-C User Manual viiCONTENTSABOUT THE MEGABIT MODEM CRA-C __________________ 1About Rate Adaptive Transmission...

Network and Management Overview62 Megabit Modem CRA-C User ManualTable 19. SNMP Configuration Default ValuesAttribute Factory DefaultDownload Image F

Network and Management OverviewMegabit Modem CRA-C User Manual 63The Megabit Modem CRA-C provides an SNMP agent that supports severalMIBs for the mana

Network and Management Overview64 Megabit Modem CRA-C User ManualThe Spanning Tree MIB can only be accessed if theSpanning Tree protocol is enabled.Pa

Network and Management OverviewMegabit Modem CRA-C User Manual 65BOOTP conforms to the following RFCs:RFC 951: Bootstrap Protocol (BOOTP)RFC 1533: DHC

Network and Management Overview66 Megabit Modem CRA-C User ManualTFTPTrivial File Transfer Protocol (TFTP) is used to download networking imagecode to

Megabit Modem CRA-C User Manual 67TECHNICAL SPECIFICATIONSADSL LineSignal Format CAP Line CodeTransmit Signal Power up to 23 dBmConnector RJ-48Etherne

Technical Specifications68 Megabit Modem CRA-C User ManualManagement and MaintenanceEmbedded SNMP AgentBOOTP/TFTP download (with RFC 1542 extensions)R

Megabit Modem CRA-C User Manual 69TECHNICAL ASSISTANCEPairGain Technical Assistance is available 24-hours-a-day, 7-days-a-week bycontacting PairGain’s

Technical Assistance70 Megabit Modem CRA-C User Manual

Megabit Modem CRA-C User Manual 71LIMITED WARRANTYPairGain Technologies, Incorporated warrants its products to be free ofdefective and faulty workmans

Contentsviii Megabit Modem CRA-C User ManualNETWORK AND MANAGEMENT OVERVIEW____________ 51MAC Layer Bridging and Spanning Tree Protocol...51S

Limited Warranty72 Megabit Modem CRA-C User Manual2Provide the following information along with the equipmentyou're returning:•Your company name,

Megabit Modem CRA-C User Manual 73GLOSSARYThe Glossary defines technical terms and abbreviations used in this manual.Access Provider See Service Provi

Glossary74 Megabit Modem CRA-C User ManualCAP Carrierless Amplitude Phase Modulation. A two-dimensional line code used in ADSL.Crosstalk Line noise t

GlossaryMegabit Modem CRA-C User Manual 75Mbps Megabits per second. 1,000,000 bits per second.MDI Media Dependent Interface.MDI-X Media Dependent Int

Glossary76 Megabit Modem CRA-C User Manual

Corporate Office14402 Franklin AvenueTustin, CA 92780Tel: (714) 832-9922Fax: (714) 832-9924For Technical Assistance:(800) 638-0031

Megabit Modem CRA-C User Manual 1ABOUT THE MEGABIT MODEM CRA-CThe PairGain® Megabit Modem™ CRA-C uses Asymmetric DigitalSubscriber Line (ADSL) technol