3COM 10BASE-2 User Manual

Size:
130.3 Kb
Download

R

UNTERMINATEDETHERNET

10BASE-2(BNC)

MODULEINSTALLATIONGUIDE

For the LANplex 2500/2016

Module Description This module contains eight (8) unterminated Ethernet10BASE-2ports that use BNC connectors. If a port on this module is at the end of a10BASE-2(BNC) segment, you must provide an external 50 Ohm terminator.

When the port is at the end of a segment, using a T connector with a terminating plug may cause interference with adjacent ports. 3Com recommends terminating ports with the ITT Pomona Y connector, Model 4896, with a terminating plug on the end, or the ITT Pomona Feed-ThruTerminator, Model4119-50.When the port is in the middle of a segment, the Y connector may be necessary.

Prior to installing the unterminated 10BASE-2(BNC) module, LANplex system software revision 7.0.0 or later and LANplex diagnostics software revision 3.0.2 or later must be installed. A system software revision supporting this module is available from the 3com BBS, the Internet FTP site (3Com.ftp.com), or 3Com Forum on Compuserve, or 3Com’s Web site (http://infodeli.3com.com/infodeli/swlib/switch_files.htm).

Unterminated

 

 

 

 

 

 

Port Status

Board

 

 

 

 

 

 

Active

Error

 

 

 

 

 

 

Error

1

2

3

4

5

6

7

8

For a description of how to configure this module into your network, see the LANplex documentation set.

Audience This guide is intended for trained technical personnel only.

Status LEDs The option module contains one Board Error LED, eight port status Active LEDs, and eight port status Error LEDs. Depending on the condition, the port status LED is either Active (green) or Error (yellow). See the table below for a description of the status LEDs.

.

LED

Name

Color

Description

 

 

 

 

Module

Board Error

Yellow

Indicates that either an error has occurred or the

Status

 

 

option module has failed a diagnostic procedure

 

 

 

 

Port

Active

Green

Indicates that the associated port is active

Status

Error

Yellow

Indicates that an error condition has occurred with

 

 

 

 

the associated port or that the port was disabled

 

 

 

from the Administration Console

 

 

 

 

Safety Information Electrostatic discharge (ESD) can damage components on the module. ESD occurs when the module is improperly handled and can cause complete or intermittent failures.

To prevent ESD-relateddamage:

Always wear the ESD wrist strap provided with the LANplex system, ensuring that it makes good skin contact

Keep the module in its antistatic shielded bag until you are ready to install it

Do not touch the components, pins, leads, or solder connections

Always handle the module by its edges

Prior to Installation Before you install your new module, follow the appropriatepre-installationinstructions in this section.

Read if initial Your LANplex system is shipped with protective faceplates covering theinstallation exposed installation slots. You must remove the protective faceplate

covering the selected installation slot prior to installing the option module.

CAUTION: When handling modules, 3Com recommends that you always use a wrist strap connected to a proper ground. This helps prevent the module from being damaged by electrostatic discharge. Additionally, when not in use, the module should be stored in an antistatic bag.

To remove the faceplate:

1Loosen the two captive screws securing the faceplate to the chassis.

2Pull the faceplate away from the system.

 

ERROR

PCMCIA

LANplex 2500 Power Run

Processor Power Fan Temp Config

Inserted

Read if replacing a module

Captive screw

Captive screw

Faceplate

You can replace a module while the system is powered on. Replacing the module requires that you remove the attached cables from the module’s ports prior to installing the new module.

To replace a module:

1Disconnect the cables from the module’s ports.

2Loosen the two captive screws securing the module to the chassis.

3Pull the module out of the chassis.

The following figures show termination of unterminated BNC ports using either a Y connector or a Feed-thruterminator.

 

ERROR

PCMCIA

LANplex 2500 Power Run

Processor Power Fan Temp Config

Inserted

 

Green = Active

Port Status

 

Yellow = Error

 

Board

Active

 

Error

Error

 

 

 

 

1

2

3

4

5

6

7

8

 

Unterminated

 

 

 

 

 

 

 

 

 

Port Status

Board

 

 

 

 

 

 

 

 

 

Active

Error

 

 

 

 

 

 

 

 

 

Error

1

2

3

4

 

5

 

6

7

8

Captive screw

 

 

 

 

 

 

 

 

 

 

Y terminator

Unterminated

 

10BASE-2(BNC)

BNC terminating plug

option module

 

ERROR

PCMCIA

LANplex 2500 Power Run

Processor Power Fan Temp Config

Inserted

 

Green = Active

Port Status

 

Yellow = Error

 

Board

Active

 

Error

Error

 

 

1

2

3

4

5

6

7

8

 

 

Unterminated

 

 

 

 

 

 

 

 

 

Port Status

 

Board

 

 

 

 

 

 

 

 

 

Active

 

Error

 

 

 

 

 

 

 

 

 

Error

Captive screw

1

2

3

4

 

5

 

6

7

8

 

Unterminated

Feed-thru

10BASE-2(BNC)

terminator

option module

 

The LANplex system will automatically reset when a module has been installed with the power on.

If you physically change the configuration of the system after defining an IP interface, the port designated for that interface may no longer be valid. You may have to redefine the interface. For information on defining an IP interface, see the Administration Console User Guide for your LANplex system.

Installing the To install the new module into the LANplex system, perform the following

Module steps:

1Ensure that you are properly grounded.

2Remove the module from its antistatic bag.

WARNING:If the system is powered on when you are replacing the module, do not insert any metal objects, such as a screwdriver or a finger wearing jewelry, in the open slot. This could cause burns or other bodily harm.

3Place the module between the guides of the selected slot and slide the module into the chassis. See the figure below.

 

ERROR

PCMCIA

LANplex 2500 Power Run

Processor Power Fan Temp Config

Inserted

 

Green = Active

Port Status

 

Yellow = Error

 

Board

Active

 

Error

Error

 

 

1

2

3

4

5

6

7

8

Unterminated

 

 

 

 

 

 

 

 

Port Status

Board

 

 

 

 

 

 

 

 

Active

Error

 

 

 

 

 

 

 

 

Error

1

2

3

4

 

5

 

6

7

8

Unterminated

 

10BASE-2(BNC)

Captive screw

option module

4To seat the module, firmly push the module forward to engage the module and backplane connectors. You will feel a slight resistance as the connectors engage.

CAUTION: If the resistance is too great, the module and backplane connectors may not be aligned. Forcing the module forward could damage the board or backplane connectors. If necessary, remove and reinsert the module, ensuring that the connectors are properly aligned. You should not have to seat the module by tightening the captive screws.

5Tighten the captive screws to secure the module in the chassis.

Once the module is installed, see Chapter 4: Cabling the System in yourGetting Started guide for information on cabling the module to the network.

Option Module Module diagnostics run at power up or when replacing a module with theDiagnostics power on. During diagnostics, the module’s port status Error LEDs are lit

yellow. When diagnostics are successfully completed, the port status Active LEDs turn green for those ports that are cabled. If any port status Error LEDs remain yellow, the port is not operational. If the module’s Board Error LED is lit yellow, the module has failed a diagnostic test. To troubleshoot module failures see Chapter 7: Troubleshooting the System in yourGetting Started guide.

3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145

© 3Com Corporation, 1996. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Corporation.

3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.

3Com Corporation provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.

3Com and LANplex are registered trademarks of 3Com Corporation. 3Com registered trademarks are registered in the United States, and may or may not be registered in other countries. Other brand and product names may be registered trademarks or trademarks of their respective holders.

Part No. 801-00321-000

Published May 1996

Revision 01