The LE-140XTQ is a 10-port Ethernet switching module that can be used with MultiNet modular smart hubs. It provides port switching capabilities and redundancy features to maximize reliability. Key features include extensive diagnostics, port and segment redundancy, compatibility with UTP/STP cabling, and manageability through MultiMan network management software.

1. LE-140XTQ
FEATURES
s Modularity
Plug-in ten port 10BaseT UTP (Unshielded
Twisted Pair) or STP (Shielded Twisted Pair)
Ethernet module for use with the MultiNet™
Smart Hubs
s Compatibility
Complies with IEEE 802.3 10BaseT
specification, performs all repeater functions
s Port Switching
Each port can be connected to one of the four
Ethernet segments within the hub, providing
maximum port utilization
s Standalone Mode
Allows independent operation as multiport
repeater
s Cabling System Support
Supports UTP and STP cables to over 160m
(525 ft)
s Innovative VLSI
Innovative VLSI provides higher reliability with
lower power consumption
s Port Redundancy
Port redundancy with automatic switchover
provides for fault tolerant links
s LAN Redundancy
Protection against bus failure by automatic
switchover to backup Ethernet LAN
s Fault Tolerance
Advanced failure protection includes auto-
partitioning and receive link test
s Extensive Diagnostics
Indications of port and module status
s Plus Mode
A unique 10BaseT Plus Mode provides superior
diagnosis, detection of transmit link failure
s Topological Flexibility
In conjunction with MultiNet’s synchronous
backbone, provides numerous layers of
hierarchical hub cascading
s Manageability
Fully manageable under MultiMan™, LANNET’s
SNMP-based network management system
MODULAR, MULTI-MEDIA NETWORKING TEN PORT10BaseT PORT SWITCHING
MODULE

2. The LE-140XTQ benefits from the use of synchronous
signalling on the MultiNet backbone. This provides
the capability of extending the network over long
ranges, as well as including a large number of hubs.
For maximum reliability, the LE-140XTQ includes
extensive diagnostic capabilities, and provides four
different diagnostic indications for each port - normal
link operation, receive link failure, partitioning active,
and transmit link failure (10BaseT Plus mode only).
Additional LEDs for the module indicate when data is
being received through a port, when a collision has
occurred, when an active bus connection is
established, and when a secondary bus connection
is established.
The module can also be set in a standalone “bus
free” mode by disconnecting it from the internal
segments and connecting the ports together,
providing a 10 port independent repeater.
The LE-140XTQ is manageable under MultiMan,
LANNET’s network management system. This allows
control, monitoring and administration of the module
from the remote management station.
The LE-140XTQ is offered as an X-type module.
Straight cables can be used to connect transceivers
and hubs. One cross over is needed to connect to
another LE-140XTQ, LE-140XTN, LE-140XT, LE-40XT,
or LE-80XT module.
LET-36
LE-140XTQ
LE-140XTQ
LE-140XTQ
LET-36
LE-140XTQLE-140XTQ
main linkredundant link
LE-140XTQ
STP or UTP
LAN
A
LAN
B
LAN
C
DESCRIPTION
The LE-140XTQ is a ten-port Ethernet port switching
plug-in module for use with the MultiNet modular,
smart hubs. It complies with IEEE 802.3 10BaseT
specifications.
The LE-140XTQ ports are equipped with shielded
RJ45 or Telco connectors, compatible with UTP or
STP cabling
The LE 140XTQ provides full repeater functionality.
The 10 ports can be connected to any one of the
four Ethernet segments of the MultiNet. Each
segment can be monitored for data received through
the port and for collision occurrences. The LE-
140XTQ has an inter-hub range of up to 160 meters
(525 feet) over standard UTP cable, such as AT&T
24 AWG DIW.
The LE-140XTQ has two modes of operation. In the
standard 10BaseT mode, the LE-140XTQ provides
auto-partitioning and receive link test. When the
enhanced 10BaseT Plus mode is selected, the
LE-140XTQ also provides detection of transmit link
failure.
Port redundancy is available. Ports 1 and 2 can be
selected by the user to operate independently or to
function as redundant ports to each other, providing
automatic switch-over in case of partition or link
failure, provided that they are connected to the same
bus.
Segment redundancy is also provided. A second
Ethernet segment can be designated as a backup to
the main segment, with automatic switch-over. When
the primary segment fails, the module connected to
that segment automatically defaults to the secondary
segment.

3. 3 flashes - transmit link failure (10BaseT Plus
mode only)
OFF - port disabled
Port Redundancy Indications:
ON - redundancy, port 1 active
Flashing - redundancy, port 2 active
OFF - redundancy disabled
s Environmental
Operating Temperature: 0°-40°C (32°-104°F)
Humidity: 5% to 95% non-condensing
EMI: Emission - Meets FCC part 15, subpart J,
class A and EN55022, class B
Immunity - Meets EN50082-1
CE: Meets with requirements
s Mechanical
Width: 4HP (20 mm). One slot in enclosure.
Height: 240 mm (4.72")
Depth: 230 mm (9.06”)
Weight: 472g (1.04 lb)
ORDERING
833049 LE-140XTQ 10 Port 10BaseT Port
Switching Module, RJ45
833050 LE-140XTQ/C 10 Port 10BaseT Port
Switching Module, Telco
SPECIFICATIONS
s Auto-Partitioning of Ports
After 32 consecutive collisions or a collision that
lasts longer than 2048 bits. Automatic
reconnection after receiving a packet of at least
512 bits with no collisions
s Auto-Partitioning of the Active Bus
After 64 consecutive collisions or a collision that
lasts longer than 4096 bits. Automatic
reconnection after receiving a packet of at least
512 bits with no collisions
s Link Lengths
160m (525 ft) over 24 AWG UTP such as AT&T’s
DIW
s Signalling
Per IEEE 802.3 10BaseT for standard mode.
10BaseT Plus mode includes RLD signal for Tx
link test
s Control
Dip Switch Controls select: 10BaseT Plus mode,
the active Ethernet segment, segment
redundancy, backup segment, port redundancy,
stand-alone mode
s Delays
UTP port to sync bus throughput - 7 bit times max
Sync bus to UTP port throughput - 4 bit times
max
Collision to jam delay - 750 nsec max
s Maximum Output Jitter
1.5 nsec
s Indicators
Bus LED Indications:
ON - bus connection
Flashing - redundant bus (if bus redundancy is
on)
“A” LED Indications:
ON - MAN/AUTO switch is set to AUTO
“+” LED Indications:
ON - 10BaseT Plus mode is active
“R” LED Indications:
ON - packet being received from port
“C” LED Indications:
ON - a collision has occurred on one of the ports
Bus Status LED:
Indicates which of four buses is connected to
ports
Port LED Indications:
ON - normal link operation
1 flash - receive link failure
2 flashes - port is partition status

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Madge Networks
Madge, the Madge logo, LANNET, MultiNet, MultiMan, LANswitch, LANstack,VirtualMaster,VirtuaLAN, DecodeMaster, InterMaster, RMONMaster, SMONMaster, SecureMaster, TerrainMaster and Cellenium aretrademarks,
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Data is subject to change without notice
© Copyright 1995 Madge Networks. All Rights Reserved. DS-
Madge Networks N.V. acquired LANNET Data Communications
Ltd. on November 28, 1995.
103040-Rev.A