Lucent Technologies LE-180XT User manual

Catalog No. 130067 Rev. 0. October 1998
Lucent Technologies
Installation Guide
LE-180XT
12-PORT 10BASE-T ETHERNET
MODULE

LE-180XT Installation Guide 1
Chapter 1
Overview
This installation guide is divided into two main sections:
• Description: A general description of the module’s features
• Installation: Step-by-step instructions for installing the module in the Cajun
M400 Gate Switch.
Description
The LE-180XT is a 12-port, asynchronous Ethernet module with shielded RJ-45
connectors that can accommodate both STP and UTP cabling infrastructures. It is
designed for use in Cajun M400 Gate Switches as part of the Ethernet connectivity
module family, and occupies one 6U slot. The LE-180XT complies with the
IEEE 802.3 10Base-T standard.
The LE-180XT benefits from an advanced Cajun M400 design enabling the network
to be extended over long distances. The module allows UTP interconnection up to
160 m (525 ft).
Ports 1 and 2 can be set to operate in port redundant mode. With port redundancy
enabled, the link connected to the primary port automatically switches to the backup
port in case of a main link failure.
The LE-180XT can be connected to any one of the Cajun M400 Ethernet backplane
buses. When bus redundancy mode is enabled, a malfunction on the selected primary
bus causes the module to automatically switch to the redundant bus. The module may
also function in Standalone mode as a Standalone repeater between all 12 ports,
disconnected from all buses.
For maximum reliability, the LE-180XT provides extensive diagnostic capabilities,
and resilient collision detection and correction. General module indicators note port
redundancy status and if the module is managed or unmanaged. Diagnostic indicators
for ports include Normal Link Operation, Receive Link Failure and Partitioning
Active.
The LE-180XT automatically detects crossed wiring errors and maintains link
operation by correcting the reversed polarity of the received data.
The LE-180XT is manageable by CajunView™, Lucent Technologies’ SNMP-based
network management system. Module parameters can be set by the network
management console or by on-board DIP switches.
The LE-180XT module enables pass through between Token Ring Modules.
Normally, Token Ring modules in a hub must be adjacent to preserve ring integrity. If
two Token Ring modules are placed on either side of the LE-180XT Ethernet module
they can still remain part of the same ring, as if the LE-180XT is transparent.

Chapter 1 Overview
2LE-180XT Installation Guide
Front Panel Diagnostics
Table 1 Front Panel Diagnostic LEDs
LED indicator Function
Ethernet Bus
Status
Normal Mode
(1, 2, 3, 4
Grouped)
LED
Status: Corresponding Bus Status:
ON Active
OFF Inactive
(When all LEDs are off, the module is in
Standalone mode.)
Redundant Mode
LED
Status:
Corresponding Bus Status:
ON Active
Blinking Standby
OFF Inactive
A :
Auto/Manual
LED
Status:
Status:
ON Module parameters are controlled by the
Network Management System, (CajunView).
OFF Module parameters are set manually using
on-board DIP switches.
<•> : Port LED
State:
Status:
Redundancy ON Redundancy Enabled →Port 1 Active, Port 2
Standby
Blinking Redundancy Enabled →Port 1 Standby, Port 2
Active
OFF Redundancy Disabled
1-12 : Port
Status
LED
Status:
Corresponding Port Status:
ON Port is Enabled and link OK
1 Blink Receive Link Failure, (link test fail)
2 Blinks Port is Partitioned
OFF Port is Disabled via management

LE-180XT Installation Guide 3
Chapter 2
Installation
Preliminary Settings
Set the module parameters as desired using the on-board DIP switches. (Refer to
figure 2 and tables 2 and 3).
Caution: The LE-180XT contains components sensitive to electrostatic discharge.
To prevent such damage, always hold the card by its sides and do not touch circuit
board components unless instructed to do so.
Before handling the module or inserting it in the hub, touch the chassis of the hub to
get rid of any electrostatic charges in your body.
Hold the module with the front-panel to your left and the backplane connectors to
your right as illustrated in the diagram below.
Figure 2 LE-180XT Circuit Board

Chapter 2 Installation
4LE-180XT Installation Guide
To set the DIP switches:
The following table describes each DIP switch and its function.
• The factory default setting for all ten DIP switches is OFF.
• To set a switch ON, slide it upward in the direction shown by the ON arrow
Caution: Do NOT use a lead pencil. Lead shedding can cause serious damage.
Table 2 SW1 DIP Switch Settings
SW# Name Function ON OFF
1A:
Auto/Manual
Determines whether
module configuration is
controlled manually by
on-board DIP switches or
by a management
application
Automatic
control; module
operates
according to
management
commands
Manual control;
module operates
according to
physical switch
settings
2SA:
Standalone
Module performs as an
independent repeater
isolated from the
backplane buses
Enabled; module
in standalone
mode
Disabled; module
NOT in
standalone mode
3PR: Port
Redundancy
Activates port redundancy Port redundancy
enabled; Port 2
redundant to
Port 1
Port redundancy
disabled; Port 2
operates as a
regular port
4BR: Bus
Redundancy
Activates bus redundancy Bus redundancy
enabled; (refer to
bus selection
table for setting
redundant buses)
Bus redundancy
disabled
5-8 SB2, SB1,
MB2, MB1
Defines main and
redundant buss
Refer to Bus selection Table

Chapter 2 Installation
LE-180XT Installation Guide 5
Table 3 Bus Selection
Main Bus Switch Secondary Bus Switch
Selection 7: MB2 8: MB1 Selection 5: SB2 6: SB1
BUS 1 Off Off BUS 1 Off Off
BUS 2 Off On BUS 2 Off On
BUS 3 On Off BUS 3 On Off
BUS 4 On On BUS 4 On On
The LE-180XT occupies one slot in the Cajun M400. The LE-180XT can be installed
or removed while power is connected to the hub.
1. Make sure all switches are set as required. (Refer to the Preliminary Settings
section.)
2. Insert the LE-180XT into any available position specified by your installation
plan. If you have management, or intend to add Lucent Technologies
management agents in the future do not insert the LE-180XT in the following
slots:
• #17 and 18 in the Cajun M440
• #10 in the Cajun M420
• #5 in the Cajun M410
3. Secure the module using the screws at the top and bottom of the front panel. Do
not over-tighten the screws.
4. Identify and connect the appropriate cables to the module. (Refer to the connector
pin assignment table on page 6 for inter-hub cable connection information.)
5. Examine the front panel LEDs to verify that the module is operating as
configured. (Refer to Table 1 on page 2 for further diagnostic information.)

Chapter 2 Installation
6LE-180XT Installation Guide
Connectors
The LE-180XT front panel has 12 modular, ISDN shielded RJ-45 connectors. The pin
assignments are as follows:
Table 4 Pin Assignments
Pin # Name
1Rx+
2Rx-
3Tx+
6Tx-
Note: Crossover RX/TX pin assignments are necessary between inter-hub
connections.
No wiring crossovers are required on connections to transceivers.
Figure 3 Cross-over Pin Assignments

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8LE-180XT Installation Guide

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LE-180XT Installation Guide 9

Lucent Technologies Inc.,
Data Networking Systems,
211 Mt. Airy Rd., Basking Ridge,
NJ 07920.
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© Copyright 1998 Lucent Technologies. All rights reserved.