3COM 10BASE-2 User Manual

U

NTERMINATED

R

E

THERNET

10BASE-2 (BNC)
M

ODULE

For the LANplex 2500/2016

Module Description This module contains eight (8) unterminated Ethernet 10BASE-2 ports that

use BNC connectors. I

(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-Thru
Terminator, Model 4119-50. When the port is in the middle of a segment, the
Y connector may be necessary.

I

NSTALLATION

f a port on this module is at the end of a 10BASE-2

G

UIDE

Audience

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

Board
Error

12345

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

This guide is intended for trained technical personnel only.

6

7

Port Status

Active
Error

8

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
Status

Port
Status

Board Error Yellow Indicates that either an error has occurred or the

option module has failed a diagnostic procedure

Active Green Indicates that the associated port is active

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-related damage:

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 appropriate pre-installation

instructions in this section.

Read if initial

installation

Your LANplex system is shipped with protective faceplates covering the
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.