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Megabit Modem CRA-C

User Manual

ADSL

Manual Number: 425-613-150-02

Megabit Modem CRA-CUser Manual

P/N 425-613-150-02

Revision 02

May 1998

Copyright © 1998. PairGain Technologies, Inc. All rights reserved.

This document contains proprietary information which is protected by copyright.

Information contained in this document is company private to PairGain Technologies, Inc. and shall not be modified, used, copied, reproduced or disclosed in whole or in part without the written consent of PairGain.

PairGain is a registered trademark, and Megabit Modem is a trademark of PairGain Technologies, Inc.

Other product names mentioned in this manual are used for identification purposes only and may be trademarks and/or registered trademarks of their respective companies.

The information in this publication is believed to be accurate in all respects. However, PairGain Technologies cannot assume responsibility for any consequences resulting from the use thereof. The information contained herein is subject to change. Revision to this publication or new additions to it may be issued to incorporate such changes.

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Megabit Modem CRA-CUser Manual

FCC NOTICE

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause harmful interference to radio communication.

However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

Any changes or modifications not expressly approved by the grantee of this device voids the user’s authority to operate the equipment.

Megabit Modem CRA-CUser Manual

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DECLARATION OF CONFORMITY

Manufacturer’s name

PairGain Technologies, Inc.

and address:

14402 Franklin Ave

 

Tustin, CA 92780-7013

 

U.S.A.

declares that

 

Product name:

Megabit Modem CRA-C

conforms to the following

 

Standards:

EN55022 (1987), EN50082-1(1992),

 

EN60950 (1994)

Application of Council Directives:

89/336/EEC, 73/23/EEC

I, the undersigned, hereby declare that the equipment specfied above conforms to the above directives and standards.

Signature:

 

 

Roy Stephens,

 

Director of Quality Assurance

Place:

Tustin, CA, U.S.A.

Date:

March 16, 1998

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Megabit Modem CRA-CUser Manual

USING THIS MANUAL

This manual helps you:

understand the features of the PairGain® Megabit Modem™CRA-Cand how the unit operates as a component within a network

install the Megabit Modem CRA-C

configure your unit to operate within the network

contact PairGain if you need additional help

Three types of messages with icons appear in the text:

Notes inform you of special circumstances.

Cautions indicate the possibility of damage to equipment.

Warnings indicate the possibility of personal injury.

Megabit Modem CRA-CUser Manual

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Using This Manual

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Megabit Modem CRA-CUser Manual

CONTENTS

ABOUT THE MEGABIT MODEM CRA-C __________________ 1

About Rate Adaptive Transmission.....................................

2

Rate Adaptation..............................................................

2

Reach, Data Rate, SNR Margin,

 

and Noise Environment............................................

4

INSTALL THE MEGABIT MODEM CRA-C _________________ 7

Unpack and Inspect the Shipment .......................................

7

Identify LEDs and Connectors ............................................

9

Front Panel .....................................................................

9

Rear Panel ....................................................................

11

Install the Megabit Modem CRA-C ..................................

12

Connect to the ADSL Line ...........................................

12

Connect to the Data Network........................................

13

Power Up and Check LEDs ..............................................

16

CONFIGURE AND VIEW STATUS________________________ 17

Connect to an ASCII Terminal..........................................

17

How to Log On and Navigate the Menus ..........................

19

How to Configure a Remote Unit......................................

23

Configure System Settings ................................................

24

Configure ADSL Transceiver ...........................................

26

Configuration ...............................................................

26

Reset ADSL Transceiver ..............................................

29

Configure the Bridge/Router.............................................

30

Configure as a Bridge ...................................................

31

Configure as a Router ...................................................

34

Configure SNMP ..........................................................

38

Reset the Ethernet Bridge .............................................

40

View Status ......................................................................

41

System Information ......................................................

41

ADSL Transceiver Status..............................................

42

Ethernet Bridge Statistics..............................................

48

Log Out ............................................................................

49

Megabit Modem CRA-CUser Manual

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Contents

NETWORK AND MANAGEMENT OVERVIEW ____________ 51

MAC Layer Bridging and Spanning Tree Protocol ............

51

Static IP Routing...............................................................

53

Megabit Modem CRA-C IP Addresses ..........................

59

Management Protocols......................................................

61

SNMP ...........................................................................

61

Megabit Modem CRA-C SNMP Agent .........................

62

MIB and Trap Support ..................................................

63

Network Configuration and Image Code Download ..........

64

BOOTP.........................................................................

64

TFTP ............................................................................

66

Encapsulation Protocols ....................................................

66

TECHNICAL SPECIFICATIONS _________________________ 67

TECHNICAL ASSISTANCE______________________________ 69

World-Wide Web..............................................................

69

FTP ..............................................................................

69

LIMITED WARRANTY _________________________________ 71

GLOSSARY ____________________________________________ 73

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Megabit Modem CRA-CUser Manual

ABOUT THE MEGABIT MODEM CRA-C

The PairGain® Megabit Modem™CRA-Cuses Asymmetric Digital

Subscriber Line (ADSL) technology to provide, on a single pair telephone line, a multi-megabitEthernet connection between the subscriber and the service provider. The Megabit ModemCRA-Ctransmits data up to 3.16 Mbps from a service provider and receives data up to 1.08 Mbps from a subscriber. The Megabit ModemCRA-Cis rate adaptive; its speed is adjusted to the maximum attainable data rate depending on distance and line condition. Additionally, ADSL technology allows ordinary telephone service to coexist with thehigh-speeddata service on the same wire pair.

The rate-adaptiveMegabit Modem allows the service provider to deliver the best possible data rate for any subscriber. Typically, a subscriber closest to the provider receives the highest data rate available, while subscribers farther away receive data at a lower transmission rate.

The Megabit Modem CRA-Chasfield-provenCarrierlessAmplitude-modulationandPhase-modulation(CAP) line coding. The2-dimensional,8-stateTrellis coding with Viterbi decoding and

the Reed-Solomonforward-error-correctionprovide robust transmission in harsh environments.

Use the Megabit Modem CRA-Cfor application solutions, particularly those requiringhigh-speedtransmission to the subscriber, such as:

_Internet access

_remote Local Area Network (LAN) access

_telecommuting

small office or home office

Other features of the Megabit Modem CRA-Cinclude:

_embedded Simple Network Management Protocol (SNMP) agent

_IEEE 802.1d transparent MAC level bridging with Spanning Tree protocol support

_static IP routing to provide secure access to the Internet

_BOOTP and TFTP to download software

_10BASE-TEthernet port for connection to an Ethernet LAN

_line port for Rate-adaptiveADSLsingle-pairconnection

console port for maintenance and management

Megabit Modem CRA-CUser Manual

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