Lantronix LMS8-A User Manual

LMS8-A

Mini Switch

Installation Guide

2

LMS8-A
Mini Switch

The Lantronix LMS8-A Mini Switch brings the
performance advantages of Ethernet switching
to the workgroup. The advantages include:

1. Separate Ethernets on each port - where
hubs provide only a single shared 10 Mbps
segment, the LMS8-A provides up to 8 sep­arate Ethernets, each capable of support­ing a full 10 Mbps of throughput

2. Collision domain separation - reduces
unnecessary traffic on each segment and
filters out bad packets

3. Full duplex capability for each port

4. Optional AUI port allows compatibility with
other 10 Mbps Ethernet media

The LMS8-A has 8 10 Mbps RJ45 ports with an
optional AUI interface available on Port 1. Each
port is capable of supporting half or full duplex
mode LMS8-A is a self-learning bridge, capable
of supporting 8,192 addresses and performing
wirespeed filtering and forwarding. All bridging
functions are automatic - no management soft­ware is required. Simply install the LMS8-A into
your workgroup network and you can immediate­ly enjoy the benefits of Ethernet switching.

3

Installation Tips

Note: These tips are additional to the Installation

Instructions that can be found on the back of
the unit.

▼ All ports on the LMS8-A can support full

duplex operation - please make sure that
each port has the proper switching setting
for the desired modes (default switch set­tings are for half duplex). When the unit is
powered on, verify the correct modes of
operation by examining the LEDs for each
port. No further configuration is necessary.
If the correct mode of operation does not
appear in the LED display, check the cable
and connecting equipment. If changes are
made, power the unit off and then on again
to reset.

▼ Use of the optional AUI on Port 1 will negate

the ability to use the RJ45 for that port.

▼ If the Link/Duplex LED for a port is not lit,

please check the cable being used. The
port will only be operational if the LED is
green (Good Link/Half Duplex) or yellow
(Good Link/Full Duplex).

Power Requirements

The Lantronix LMS8-A is shipped with either a
120VAC (-01 version) or a 220VAC (-02 version)
power supply. Input power requirements are 15
volts at 1.0 Amps.

CAUTION:

Not for installation in air ducts or plenums
or other environmental air handling spaces.
Changes or modifications to this device not
explicitly approved by Lantronix will void the
user’s authority to operate this device.

4

Cable Requirements

The Lantronix LMS8-A is compatible with UTP
(unshielded twisted pair) and STP (shielded
twisted pair) cables. EIA category 3,4 or 5 cables
can be supported on the RJ45 connectors.

All ports of the LMS8-A are configured as MDI-X
ports; Port 2 has an MDI option for connecting to
hubs, repeaters or other switches.

The following cable configuration is suggested
for the cables attached to an LMS8-A:

LMS8-A End MDI-X MDI

nodes ports ports

Pin 1 TD+ TD+ RD+ TD+

Pin 2 TD- TD- RD- TD-

Pin 3 RD+ RD+ TD+ RD+

Pin 6 RD- RD- TD- RD-

1. The cable between the LMS8-A and an
end-node or another switch is straight
through.

2. The cable between the LMS8-A and a hub
or repeater is not straight through but rather
a “crossover” (transmit pairs and receive
pairs are reversed). By selecting the MDI
option (when available), a straight through
cable can be used.

5

Technical Support

If problems occur during product operation,
please check the LMS8-A switch settings, cables,
connectors, network terminators, hardware
compatibility and other network components first.

Prior to contacting Lantronix Technical Support,
please have the following information available:

Model number and serial number
Purchase date
Network configuration
Definition of the problem encountered

Lantronix Technical Support can easily be
reached at our worldwide website at www.lantron­ix.com. The website contains technical tips and
other helpful product information.

Lantronix Technical Support can also be
reached via email at [e-mail], or
via telephone between the hours of 6:00 a.m.
and 5:30 p.m. (PST) at 800-422-7044 (USA) or
949-453-3990 outside of the United States.

Your Lantronix LMS8-A Mini Switch is covered by
a five-year limited warranty.

WARNING!

This device complies with part 15 of the FCC
rules. Operation is subject to the following
restrictions: (1) this device may not cause harm­ful interference, and (2) this device must accept
any interference received, including that which
may cause undesired operation. Operation of
this equipment in a residential area is likely to
cause interference in which case the user, at his
or her own expense, will be required to take
whatever measures may be required to correct
the interference.

NOTE: The RJ45 ports are not for telephone use!

6

Declaration of Conformity

(according to ISO/IEC Guide 22 and EN 45014)

Manufacturer’s Name: Lantronix

Manufacturer’s Address: 15353 Barranca Parkway

Irvine, CA 92618 USA

declares, that the product:

Product Name: Micro Switch

Model Number(s): LMS8-A

conforms to the following standards:

Safety: EN 60950: 1988 + A1, A2

EMC: EN 55022: 1988 Class A

EN 50082-1: 1992

IEC 801-2: 1991/prEN55024-2:

1992-4kV CD, 8kV AD.

IEC 801-3: 1992/prEN55024-3: 1991-3V/m

IEC 801-4: 1988/prEN55024-4:

1992-.05kV Signal Lines
1kV Power Lines

Supplementary Information:

“The product complies with the requirements of the

Low Voltage Directive 73/23/EEC and the EMC Directive
89/336/EEC.”

Manufacturer’s Contact: Director of Quality Assurance

Lantronix
15353 Barranca Parkway
Irvine, CA 92618 USA
Tel: [phone]
Fax: [phone]

15353 Barranca Parkway, Irvine, CA 92618

949-453-3990 ▼ Fax: [phone]

Direct Sales: 800-422-7055 ▼ [e-mail]

International Sales: 949-450-7227 ▼ [e-mail]

Tech Support: 800-422-7044 ▼ [e-mail]

www.lantronix.com

Part No. 900-115

I

mportant Instructions

For LMS and LFX Installation

▼ Design connections to avoid loops - these unmanaged switches

do not support Spanning Tree Algorithm

▼ If using dedicated switch ports for a connection to a single

server, single user or another switch, use full duplex if
possible for much better performance

▼ If using 10BASE2, consider using a repeater connected to a

LMS/LFX 10BASE-T port instead of a transceiver, or contact
Lantronix for more information

▼ Avoid bottlenecks in network design by attaching servers to the

same switch as their most common clients

▼ Try to configure each side of the extender/bridge so that

nodes that will communicate frequently are on the same port

▼ To extend 100BASE-FX fiber to maximum length, use 2

LFX2-MAs (with 100BASE-FX fiber transceivers) connected by a
Category 5 cable; this allows both fiber links to be extended
to the 412 meter limit (each LFX2-MA extender/switch
regenerates the signal)

▼ Because it is a store-and-forward device, the LFX2 filters out

bad packets from attached network segments, so it can be
used as a screen between a problem segment and the
network backbone

15353 Barranca Parkway Irvine California 92618 [e-mail]

949-453-3990 Fax: [phone]