LE-140XTF - Ethernet module for LET-36 (Historical documentation)

1. LE-140XTF
FEATURES
s Modularity
Plug-in multi-media module with 12 10BaseT ports and
two synchronous fiber (10BaseFB) ports for use in
MultiNet™ smart hubs
s Topological Flexibility
Integrated synchronous backbone provides numerous
layers of hierarchical hub cascading
s Cost Effective
Single slot module with high port density allows
increased user and backbone links per hub
s Compatibility
Complies with IEEE 802.3 10BaseT specification and
10BaseFB specifications
s Multiple LANs
Selectable connection to one of four Ethernet LANs
within the hub
s Standalone Mode
Allows independent operation as multiport repeater with
integral connection to fiber backbone
s Port Redundancy
Fiber port redundancy with automatic switchover
provides for fault tolerant backbone design
s LAN Redundancy
Protection against bus failure by automatic switchover to
backup Ethernet LAN
s Extensive Diagnostics
Diagnostic indications of port and module status with
unique 10BaseT Plus mode for superior diagnostics
s Manageability
Fully manageable under MultiMan™, LANNET's
SNMP-based network management system
MODULAR, MULTI-MEDIA NETWORKING 14 PORT MULTI-MEDIA ETHERNET MODULE
DESCRIPTION
The LE-140XTF is a fourteen port 6U Ethernet plug-in
module for use with the MultiNet modular, multi-media,
multi-LAN active star enclosures. It provides 12 ports for
standard Unshielded Twisted Pairs (UTP) connectivity as
per the IEEE 802.3 10BaseT specification. The module
includes the Plus mode, LANNET's enhanced two way
diagnostic mechanism for 10BaseT. In addition the
LE-140XTF has two 10BaseFB fiber optic ports for
connection to a multi-level fault tolerant network backbone.
The LE-140XTF provides user selectable connection to any
one of the four Ethernet LANs available in the MultiNet
enclosures. This allows for the co-existence of multiple
independent Ethernet networks within the same hub,
reduces LAN congestion and provides flexible bridging
capabilities. A standalone mode is also available, providing
an independent 12 port segment with integrated fiber
connectivity. In addition to supporting IEEE 802.3 10BaseT
transceivers, the fiber ports can provide hub to hub
interconnection with links of up to 3000m (10,000 ft).
The LE-140XTF is manageable to MultiMan, LANNET's
advanced SNMP-based Network Management System.

2. LET-18E
LET-36
LE-140XTF
LET-36
LE-140XTF
LE-140XTC
main linkredundant link
LET-18E
LE-140XTF
LE-140XTC
MultiMan provides extensive control, monitoring and
administration of the module from the remote management
console. MultiMan offers performance and event reporting
down to the port level.
The LE-140XTF UTP ports have two user selectable modes
of operation, 10BaseT and 10BaseT Plus.
The standard 10BaseT mode implements full repeater
functionality, with auto-partitioning and receive link status
test as per the standard.
The 10BaseT Plus mode includes detection of transmit link
failures, in addition to all the features of the standard
10BaseT mode. The Plus mode is completely transparent
to 10BaseT standard equipment. Switching between
modes is done on board or by Network Management.
Partitioning of faulty segments is activated automatically to
prevent disruption of the rest of the network. Reconnection
is also automatic - when normal operation resumes.
The two fiber ports are compliant with the IEEE 802.3
10BaseFB standard for backbone links, and provide
repeaterless interconnection between hubs for reliable
network design. Networks diameters exceeding 4 km
(2.5 miles) can be implemented when using fiber optics.
The user can select one of the fiber optic ports to be a
backup to the other, enabling fault tolerant network design.
Link communication will automatically switch over to the
redundant fiber port if the link fails on the main port.
Without redundancy the two ports function independently.
LAN redundancy automatically toggles module to backup
LAN preventing disruption of communications by
malfunctioning equipment.
SPECIFICATIONS
10BaseT Ports
s Auto-Partitioning
After 32 consecutive collisions or a collision followed by
a transmission longer than 2048 bits. Automatic
reconnection after receiving or transmitting a packet of
at least 512 bits with no collisions.
s Link Lengths
100m (330 ft) over 24 AWG UTP such as AT&T's DIW
s Signaling
Per IEEE 802.3 10BaseT for standard mode. 10BaseT
Plus mode includes RLD signal for Tx link test
s Indicators
Port Indications:
on - normal link operation
1 blink - Rx link failure
2 blinks - Port Partition
3 blinks - Tx link failure (in 10BaseT Plus mode only)
off - port disconnected
Plus Mode:
on - plus mode
off - standard mode
s Maximum Output Jitter
Twisted pair port to twisted pair port - 1.5 nsec

3. s Pin Assignment
Female TELCO connector
Pin Port Name Pin Port Name
26 1 Rx+ 1 1 Rx-
27 1 Tx+ 2 1 Tx
28 2 Rx+ 3 2 Rx-
29 2 Tx+ 4 2 Tx-
30 3 Rx+ 5 3 Rx-
31 3 Tx+ 6 3 Tx-
32 4 Rx+ 7 4 Rx-
33 4 Tx+ 8 4 Tx-
34 5 Rx+ 9 5 Rx-
35 5 Tx+ 10 5 Tx-
36 6 Rx+ 11 6 Rx-
37 6 Tx+ 12 6 Tx-
38 7 Rx+ 13 7 Rx-
39 7 Tx+ 14 7 Tx-
40 8 Rx+ 15 8 Rx-
41 8 Tx+ 16 8 Tx-
42 9 Rx+ 17 9 Rx-
43 9 Tx+ 18 9 Tx-
44 10 Rx+ 19 10 Rx-
45 10 Tx+ 20 10 Tx-
46 11 Rx+ 21 11 Rx-
47 11 Tx+ 22 11 Tx-
48 12 Rx+ 23 12 Rx-
49 12 Tx+ 24 12 Tx-
When interconnecting hubs using LE-140XTF, an odd
number of crossovers is required on each twisted pair
link. No crossovers are needed on links to transceiver
Fiber Ports
s Optical Parameters
Transmit:
Source: Ga-Al-As High Radiance LED (820±20nm)
Mean power coupled into fiber:
High Low Fiber Type N.A
- 8.5± 2.0dBm -13.0± 2.0dBm 100/140µ 0.29
-10.5± 2.0dBm -14.0± 2.0dBm 85/125µ 0.26
-12.0± 2.0dBm -16.5± 2.0dBm 62.5/125µ 0.28
-16.0± 2.0dBm -21.0± 2.0dBm 50/125µ 0.20
Receive:
Detector: Silicon PIN Photodiode
Sensitivity: Mean Optical Power Input for BER <10-10
-32dBm (0.63µW) or less
Saturation: Mean Optical Power Input of -12 dBm
(32µW) or more
Dynamic Range: 20dB
Connector: ST
s Maximum Preamble Bits Consumed
Fiber port to fiber/twisted pair port - 0 bits
s Maximum Jitter
Fiber port to fiber/twisted pair port - 0 nsec
s Signaling
10 MHz± 0.01% Manchester encoding for data.
Manchester code violations for ontrol and diagnostics.
Idle signal, 2.5MHz, Remote Fault signal, 1.67MHz
s Jabber Protection
8.2 msec
s Auto Partition
Same as in 10BaseT port
s Indicators
Port Redundancy LED:
on - redundancy enabled, port 1 active
blinking - redundancy enabled, port 2 active
Port LEDs:
on - normal link operation
1 blink - no light is received in input (Rx) fiber
2 blinks - local Jabber
3 blinks - malfunction in output (Tx) fiber
(Remote Fault)
5 blinks - undefined input sequence
6 blinks - Port Partition
off - port disabled
General
s Control
DIP switch for 10BaseT standard or Plus mode
DIP switch for activating port redundancy
DIP switch for AUTO/MANUAL management status
2 DIP switches for selecting network connection
DIP switch for setting LAN redundancy on
2 DIP switches for selecting redundant LAN
DIP switch for selection of standalone mode
Four jumpers for High/Low F/O power transmission
s Delays
UTP port to sync bus delay - 5 bit times
Sync bus to UTP port delay - 3.5 bit times
Fiber port to sync bus delay - 9 bit times
Sync bus to fiber port delay - 4 bit times
Fiber port to UTP port delay - 10 bit times
UTP port to fiber port delay - 5 bit times
Collision to jam delay - 650 nsec max
s Indicators
LAN Connection LEDs:
on - LAN connected
blinking - redundant LAN
all off - standalone mode
Management Status:
on - module is managed
off - module in manual mode
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
Panel width: 4HP (20 mm), one slot in enclosure
Size: Height: - 240 mm (9.45")
Depth: - 230 mm (9.06")
Weight: 0.45kg (0.99lb)
s Power Consumption
2.2 Amp at 5 VDC
ORDERING
833047 LE-140XTF/ST 14 Port Multi-Media Module

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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.
103032-Rev. C