Black Box LMC3050C User Manual

Page 1 Page 2 Page 3 Page 4 Page 5 Page 6

Dynamic Fiber Conversion System

4Tx/L2 User Manual

Order toll-free in the U.S.: Call 877-877-BBOX
(outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days
a week; Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation,
1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com
E-mail: [e-mail]

CUSTOMER

SUPPORT

INFORMATION

Description

The

DFCS 4Tx/L2 is a 4-port 10/100 Ethernet Switch

Module that supports the IEEE 802.3 Ethernet standard
and allows connectivity between 10Base-T and 100Base-Tx
unshielded twisted pair (UTP) devices on any of its
front-plane ports. The 4Tx/L2 fits the DFCS module
standard and can be used in any DFCS chassis.

The 4Tx/L2

supports Half-Duplex and Full-Duplex modes

and features an automatic cross-over UTP circuitry
that facilitates easy attachment to hubs, switches and
workstations.

All four front-plane ports operate in an auto-negotiation
mode and can auto-sense the proper speed and duplex
mode for optimal operation. All four front-plane ports
can be set via the network management to any desired
speed and duplex mode. Two of the four can also be
set manually via dip-switches.

The 4Tx/L2 can be used as a standard compact four-port
10/100 switch. It can also use its two additional 10/100
backplane ports to connect to adjacent modules and
accommodate flexible network configurations such as
in-band management and multi-module configurations.

The 4Tx/L2 can be used in an unmanaged or managed
fashion. When unmanaged, it can be installed in a chassis
without a SNMP and Telnet Management Module (MGT). T o be
managed, a MGT module must be installed in the same
chassis

Port Structure
Using a 6-port-switch design, the 4Tx/L2 features four

front-plane 10/100 UTP ports and two 10/100 Ethernet
backplane ports (“A” and “B”) that can connect to adjacent

modules within the same chassis.
The four front-plane 10/100 ports are designated as P1-P4

where P1 is located at the top (closest to the power LED)
and P4 is at the bottom (closest to the fastener screw).
When the 4Tx/L2 A and B ports are enabled (using the “BP
A EN” or “BP B EN” dip-switches), they connect via the
chassis’ backplane to the slots to the left and right of the
4Tx/L2 module. When another switch-based module with
backplane port connections such as a 10/100T-Fx or a
MGT is installed in an adjacent slot, it can be connected
via the backplane to the 4Tx/L2 to facilitate a multi-module
configuration.

Application Example

In-Band Managed Switch with Fiber Uplink

“A”Link

“B”Link

Chassis

Backplane

10/100T-FxModule

A

B

Internal
10/100

switchchip

UTP

10/100port

Fiber

100port

4Tx/L2 Module

A

B

Internal
10/100

switchchip

4-port10/100 UTP

Switch

MGT Module

A

MGT

front/
back
select

MGTUTP

10port

Fig. 1 In-Band Managed Switch with Fiber Uplink

Fig. 1, depicts a chassis with three modules plugged into
three of its adjacent backplane slots. The adjacent slots
are connected via the backplane using the A and B 10/100
Ethernet links. In this example, a 10/100T-Fx (a 10/100

converter with fiber port) in the center slot connects to the
slot on its left using the A link and to the slot on its right
using the B link.

In this example, the module on the left is a MGT Module
and it connects via its A backplane port to the 10/100T-Fx
facilitating “In-Band” management (via the fiber uplink).
The module on the right is the 4Tx/L2 4-port switch module
and it connects via its B backplane port to the 10/100T-Fx
facilitating a 5-port 10/100 Ethernet switch with a fiber
uplink configuration. This 3-module configuration provides
an effective 5-port 10/100 managed switch with a fiber
uplink configuration.

This example shows how the 4Tx/L2 can be used as a
managed or unmanaged switch.

Board Mounted Dip-Switch Settings

BPA EN

BP B EN

MAN

10

HD

MAN

10

HD

P1

P2

AN

100

FD

AN

100

FD

(Port1)

(Port2)

Fig 2. Board Mounted Dip Switches

Backplane Port A “BP A EN” Dip-Switch
When the “BP A EN” dip-switch is in the “right” position
(factory setting), the A backplane Port is disabled and the
module is disconnected from the A backplane Link. When
in the “left” position, the A backplane Port is enabled and
connects the 4Tx/L2 to the A backplane Link.

Backplane Port A “BP A EN” Dip-Switch
When the “BP B EN” dip-switch is in the “right” position
(factory setting), the B backplane Port is disabled and the
module is disconnected from the B backplane Link. When
in the “left” position, the B backplane Port is enabled and
connects the 4Tx/L2 to the B backplane Link.

Port 1 “AN/MAN“ Dip-Switch:
When in “AN” (Auto-Negotiation) “right” position (factory
setting), Port 1 (P1) auto-negotiates and matches the
10/100 speed and duplex mode of a mating auto­negotiating UTP port.
When in “MAN” (Manual) “left” position, the port does

not auto-negotiate and operates in the mode selected
by the P1 “10/100” and “HD/FD” dip-switches.

Port 1 “10/100” Speed Selection Dip-Switch
When the “AN/MAN” dip-switch is in the “MAN” position,
the P1 “10/100” dip-switch selects the speed of the P1
port. When in the right “100” position (factory setting),
P1 operates at 100 Mbps. When in the left “10” position,
P1 operates at 10 Mbps.
Port 1 “HD/FD” Full/Half Duplex Dip-Switch:
When the P1 “AN/MAN” switch is in the “MAN” position,
the P1 “HD/FD” switch selects the duplex mode of the P1
port. When in the “FD” (Full Duplex) “right” position (factory
setting), P1 operates in full duplex. When in the “HD”
(Half Duplex) “left” position, P1 operates in half duplex.
Port 2 “AN/MAN“ Dip-Switch:
When in “AN” (Auto-Negotiation) “right” position (factory
setting), Port 2 (P2) auto-negotiates and matches the
10/100 speed and duplex mode of a mating auto­negotiating UTP port.

DFCS 4Tx/L2

Connec tor Type Dis t a nc e Mode l

RJ-45 100 m LMC3050C

When in “MAN” (Manual) “left” position, the port does
not auto-negotiate and operates in the mode selected
by the P2 “10/100” and “HD/FD” dip-switches.

Port 2 “10/100” Speed Selection Dip-Switch
When the “AN/MAN” dip-switch is in the “MAN” position,
the P2 “10/100” dip-switch selects the speed of the P2
port. When in the right “100” position (factory setting),
P2 operates at 100 Mbps. When in the left “10” position,
P2 operates at 10 Mbps.

Port 2 “HD/FD” Full/Half Duplex Dip-Switch:
When the P2 “AN/MAN” switch is in the “MAN” position,
the P2 “HD/FD” switch selects the duplex mode of the P2
port. When in the “FD” (Full Duplex) “right” position (factory
setting), P2 operates in full duplex. When in the “HD”
(Half Duplex) “left” position, P2 operates in half duplex.

Note that attaching an auto-negotiating UTP port to a
non-auto-negotiating (manual / forced / hard-coded)
UTP port may result in an unpredictable port setting
with excessive collisions and poor link performance.
When operating in manual mode, both mating ports
MUST be set manually to the same speed and duplex
mode.

“RJ45 Cross-Over” Slide-Switch:
When the P1 “AN/MAN” switch is in the “MAN” position,

the “RJ45 Cross-Over” slide-switch controls the “Straight­Through” or “Crossed” wiring of the P1 port. When
connecting P1 to a hub or switch, set slide-switch to the
“Switch” (factory setting) position. When connecting to a
workstation, set to “Workstation”.

040-L3050-001A 11/03

Page 7 Page 8 Page 9

TRADEMARKS

All applied-for and registered trademarks are the
property of their respective owners.

FEDERAL COMMUNICATIONS COMMISSION AND
CANADIAN DEPARTMENT OF COMMUNICATIONS

RADIO FREQUENCY INTERFERENCE STA TEMENTS

This equipment generates, uses, and can radiate radio
frequency energy and if not installed and used properly,
that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio
communication. It has been tested and found to comply
with the limits for a Class A computing device in accordance
with the specifications in subpart B of Part 15 of FCC
rules, which are designed to provide reasonable protection
against such interference when the equipment is op­erated in a commercial environment. Operation of this
equipment in a residential area is likely to be cause inter­ference, in which case the user at his own expense will be
required to take whatever measures may be necessary
to correct the interference.

Changes or modifications not expressly approved by the
party responsible for compliance could void the user’s
authority to operate the equipment.

This digital apparatus does not exceed the Class A limits
for radio noise emission from digital apparatus set out in
the Radio Interference Regulation of the Canadian
Department of Communications.

Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant les limites applicables aux
appareils numéirques de las classe A prescrites dans le
Règlement sur le brouillage radioélectrique publié par le
ministère des Communications du Canada.

NORMAS OFICIALES MEXICANAS (NOM)

ELECTRICAL SAFETY STATEMENT

1. Todas las instrucciones de seguridad y operación deberán ser leídas
antes de que el aparato eléctrico sea operado.

2. Las instrucciones de seguridad y operación deberán ser guardadas
para referencia futura.

3. Todas las advertencias en el aparato eléctrico y en sus instrucciones
de operación deben ser respetadas.

4. Todas las instrucciones de operación y uso deben ser seguidas.

5. El aparato eléctrico no deberá ser usado cerca del agua—por
ejemplo, cerca de la tina de baño, lavabo, sótano mojado o cerca de
una alberca, etc.

6. El aparato eléctrico debe ser usado únicamente con carritos o
pedelstales que sean recomendados por el fabricante.

7. El aparato eléctrico debe ser montado a la pared o al techo sólo
como sea recomendado por el fabricante.

8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico
más allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.

9. El aparato eléctrico debe ser situado de tal manera que su posición
no interfiera su uso. La colocación del aparato eléctrico sobre una
cama, sofá, alfombra or superficie similar puede bloquea la
ventilación, no se debe colocar en libreros o gabinetes que impidan
el flujo de aire por los orificios de ventilación.

10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de
calor como radiadores, registros de calor, estufas u ostros aparatos
(incluyendo amplificadores) que producen calor.

11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo
del tipo descrito en el instructivo de operación, o como se indique en el
aparato.

12. Precación debe ser tomada de tal manera que la tierra fisica y la
polarización del equipo no sea eliminada.

13. Los cables de la fuente de poder deben ser guiados de tal manera
que no sean pisados ni pellizcados por objetos colocados sobre o
contra ellos, poniendo particular atención a los contactos y

©Copyright 2003. Black Box Corporation. All rights reserved.

1000 Park Drive · Lawrence, PA 15055-1018

724-746-5500 · Fax [phone]

receptáculos donde salen del aparato.

14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.

15. En caso de existir, una antena externa deberá ser localizada lejos de
las lineas de energia.

16. El cable de corriente deberá ser desconectado del cuando el equipo
no sea usado por un largo periodo de tiempo.

17. Cuidado debe ser tomado de tal manera que objectos liquidos no
sean derramados sobre la cubierta u orificios de ventilación.

18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato;

o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio

en su desempeño; o
E: El aparto ha sido tirado o su cubierta ha sido dañada.

Page 12

SPECIFICATIONS

Model 4Tx/L2

Protocols

10Base-T or
100Base-Tx

Connecto rs RJ-45

Controls

UTP X-over (Port 1),

Auto/Man, 10/100,

FD/HD

LED
Displays

Pwr, 10 link (1 per port)

,

100 link (1 per port)

Dime nsions W:0.85" x D:4.5" x H:2.8

"

Weight 8 oz.

Compliance

UL, CE,

FCC Class A

Temperatu re

-Operating

-Storage

0 to 50 C

-40 to 80 C

Altitude 0-10,000 ft
MTBF (hrs) 1,150,000

Software Controlled Switch Settings

When managed, the following 4Tx/L2 switch settings
can be controlled:

- A and B Backplane Ports control.

- P1-P4 Auto/Manual Negotiation mode selection

- P1-P4 10/100 speed selection

- P1-P4 Duplex mode selection
The last to configure a mode (software or the physical
board mounted dip-switch) controls the mode of
operation.

See respective software manuals for details.

LED Indicators

LED Color Description

Power: Yellow On--Power
Port 1-100 Link: Green On--Link / Blink--activity
Port 1-10 Link: Green On--Link / Blink--activity
Port 2-100 Link: Green On--Link / Blink--activity
Port 2-10 Link: Green On--Link / Blink--activity
Port 3-100 Link: Green On--Link / Blink--activity
Port 3-10 Link: Green On--Link / Blink--activity
Port 4-100 Link: Green On--Link / Blink--activity
Port 4-10 Link: Green On--Link / Blink--activity

Page 11Page 10

Mounting and Cable Attachment

DFCS modules are hot-swappable and can be installed
into any DFCS chassis.

1. Using the chassis’ module guides for alignment, insert the
module into the selected slot and secure using the front
panel fastener screw.

2. Using a Category 5 cable attach the UTP P1-P4 ports to
mating 10 or 100Base-Tx Ethernet device ports.

3. Set the BP A EN and BP B EN Backplane Port enable
dip-switches as needed.

4. Set the AN/MAN Auto-Negotiation, 10/100 speed and
HD/FD duplex mode dip-switches as needed.

040-L3050-001A 11/03

Page 7 Page 8 Page 9

TRADEMARKS

All applied-for and registered trademarks are the
property of their respective owners.

FEDERAL COMMUNICATIONS COMMISSION AND
CANADIAN DEPARTMENT OF COMMUNICATIONS

RADIO FREQUENCY INTERFERENCE STA TEMENTS

This equipment generates, uses, and can radiate radio
frequency energy and if not installed and used properly,
that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio
communication. It has been tested and found to comply
with the limits for a Class A computing device in accordance
with the specifications in subpart B of Part 15 of FCC
rules, which are designed to provide reasonable protection
against such interference when the equipment is op­erated in a commercial environment. Operation of this
equipment in a residential area is likely to be cause inter­ference, in which case the user at his own expense will be
required to take whatever measures may be necessary
to correct the interference.

Changes or modifications not expressly approved by the
party responsible for compliance could void the user’s
authority to operate the equipment.

This digital apparatus does not exceed the Class A limits
for radio noise emission from digital apparatus set out in
the Radio Interference Regulation of the Canadian
Department of Communications.

Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant les limites applicables aux
appareils numéirques de las classe A prescrites dans le
Règlement sur le brouillage radioélectrique publié par le
ministère des Communications du Canada.

NORMAS OFICIALES MEXICANAS (NOM)

ELECTRICAL SAFETY STATEMENT

1. Todas las instrucciones de seguridad y operación deberán ser leídas
antes de que el aparato eléctrico sea operado.

2. Las instrucciones de seguridad y operación deberán ser guardadas
para referencia futura.

3. Todas las advertencias en el aparato eléctrico y en sus instrucciones
de operación deben ser respetadas.

4. Todas las instrucciones de operación y uso deben ser seguidas.

5. El aparato eléctrico no deberá ser usado cerca del agua—por
ejemplo, cerca de la tina de baño, lavabo, sótano mojado o cerca de
una alberca, etc.

6. El aparato eléctrico debe ser usado únicamente con carritos o
pedelstales que sean recomendados por el fabricante.

7. El aparato eléctrico debe ser montado a la pared o al techo sólo
como sea recomendado por el fabricante.

8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico
más allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.

9. El aparato eléctrico debe ser situado de tal manera que su posición
no interfiera su uso. La colocación del aparato eléctrico sobre una
cama, sofá, alfombra or superficie similar puede bloquea la
ventilación, no se debe colocar en libreros o gabinetes que impidan
el flujo de aire por los orificios de ventilación.

10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de
calor como radiadores, registros de calor, estufas u ostros aparatos
(incluyendo amplificadores) que producen calor.

11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo
del tipo descrito en el instructivo de operación, o como se indique en el
aparato.

12. Precación debe ser tomada de tal manera que la tierra fisica y la
polarización del equipo no sea eliminada.

13. Los cables de la fuente de poder deben ser guiados de tal manera
que no sean pisados ni pellizcados por objetos colocados sobre o
contra ellos, poniendo particular atención a los contactos y

©Copyright 2003. Black Box Corporation. All rights reserved.

1000 Park Drive · Lawrence, PA 15055-1018

724-746-5500 · Fax [phone]

receptáculos donde salen del aparato.

14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.

15. En caso de existir, una antena externa deberá ser localizada lejos de
las lineas de energia.

16. El cable de corriente deberá ser desconectado del cuando el equipo
no sea usado por un largo periodo de tiempo.

17. Cuidado debe ser tomado de tal manera que objectos liquidos no
sean derramados sobre la cubierta u orificios de ventilación.

18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato;

o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio

en su desempeño; o
E: El aparto ha sido tirado o su cubierta ha sido dañada.

Page 12

SPECIFICATIONS

Model 4Tx/L2

Protocols

10Base-T or
100Base-Tx

Connecto rs RJ-45

Controls

UTP X-over (Port 1),

Auto/Man, 10/100,

FD/HD

LED
Displays

Pwr, 10 link (1 per port)

,

100 link (1 per port)

Dime nsions W:0.85" x D:4.5" x H:2.8

"

Weight 8 oz.

Compliance

UL, CE,

FCC Class A

Temperatu re

-Operating

-Storage

0 to 50 C

-40 to 80 C

Altitude 0-10,000 ft
MTBF (hrs) 1,150,000

Software Controlled Switch Settings

When managed, the following 4Tx/L2 switch settings
can be controlled:

- A and B Backplane Ports control.

- P1-P4 Auto/Manual Negotiation mode selection

- P1-P4 10/100 speed selection

- P1-P4 Duplex mode selection
The last to configure a mode (software or the physical
board mounted dip-switch) controls the mode of
operation.

See respective software manuals for details.

LED Indicators

LED Color Description

Power: Yellow On--Power
Port 1-100 Link: Green On--Link / Blink--activity
Port 1-10 Link: Green On--Link / Blink--activity
Port 2-100 Link: Green On--Link / Blink--activity
Port 2-10 Link: Green On--Link / Blink--activity
Port 3-100 Link: Green On--Link / Blink--activity
Port 3-10 Link: Green On--Link / Blink--activity
Port 4-100 Link: Green On--Link / Blink--activity
Port 4-10 Link: Green On--Link / Blink--activity

Page 11Page 10

Mounting and Cable Attachment

DFCS modules are hot-swappable and can be installed
into any DFCS chassis.

1. Using the chassis’ module guides for alignment, insert the
module into the selected slot and secure using the front
panel fastener screw.

2. Using a Category 5 cable attach the UTP P1-P4 ports to
mating 10 or 100Base-Tx Ethernet device ports.

3. Set the BP A EN and BP B EN Backplane Port enable
dip-switches as needed.

4. Set the AN/MAN Auto-Negotiation, 10/100 speed and
HD/FD duplex mode dip-switches as needed.

Page 1 Page 2 Page 3 Page 4 Page 5 Page 6

Dynamic Fiber Conversion System

4Tx/L2 User Manual

Order toll-free in the U.S.: Call 877-877-BBOX
(outside U.S. call 724-746-5500)
FREE technical support 24 hours a day, 7 days
a week; Call 724-746-5500 or fax [phone]
Mailing address: Black Box Corporation,
1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com
E-mail: [e-mail]

CUSTOMER

SUPPORT

INFORMATION

Description

The

DFCS 4Tx/L2 is a 4-port 10/100 Ethernet Switch

Module that supports the IEEE 802.3 Ethernet standard
and allows connectivity between 10Base-T and 100Base-Tx
unshielded twisted pair (UTP) devices on any of its
front-plane ports. The 4Tx/L2 fits the DFCS module
standard and can be used in any DFCS chassis.

The 4Tx/L2

supports Half-Duplex and Full-Duplex modes

and features an automatic cross-over UTP circuitry
that facilitates easy attachment to hubs, switches and
workstations.

All four front-plane ports operate in an auto-negotiation
mode and can auto-sense the proper speed and duplex
mode for optimal operation. All four front-plane ports
can be set via the network management to any desired
speed and duplex mode. Two of the four can also be
set manually via dip-switches.

The 4Tx/L2 can be used as a standard compact four-port
10/100 switch. It can also use its two additional 10/100
backplane ports to connect to adjacent modules and
accommodate flexible network configurations such as
in-band management and multi-module configurations.

The 4Tx/L2 can be used in an unmanaged or managed
fashion. When unmanaged, it can be installed in a chassis
without a SNMP and Telnet Management Module (MGT). To be
managed, a MGT module must be installed in the same
chassis

Port Structure
Using a 6-port-switch design, the 4Tx/L2 features four

front-plane 10/100 UTP ports and two 10/100 Ethernet
backplane ports (“A” and “B”) that can connect to adjacent

modules within the same chassis.
The four front-plane 10/100 ports are designated as P1-P4

where P1 is located at the top (closest to the power LED)
and P4 is at the bottom (closest to the fastener screw).
When the 4Tx/L2 A and B ports are enabled (using the “BP
A EN” or “BP B EN” dip-switches), they connect via the
chassis’ backplane to the slots to the left and right of the
4Tx/L2 module. When another switch-based module with
backplane port connections such as a 10/100T-Fx or a
MGT is installed in an adjacent slot, it can be connected
via the backplane to the 4Tx/L2 to facilitate a multi-module
configuration.

Application Example

In-Band Managed Switch with Fiber Uplink

“A”Link

“B”Link

Chassis

Backplane

10/100T-FxModule

A

B

Internal
10/100

switchchip

UTP

10/100port

Fiber

100port

4Tx/L2 Module

A

B

Internal
10/100

switchchip

4-port10/100 UTP

Switch

MGT Module

A

MGT

front/

back

select

MGTUTP

10port

Fig. 1 In-Band Managed Switch with Fiber Uplink

Fig. 1, depicts a chassis with three modules plugged into
three of its adjacent backplane slots. The adjacent slots
are connected via the backplane using the A and B 10/100
Ethernet links. In this example, a 10/100T-Fx (a 10/100

converter with fiber port) in the center slot connects to the
slot on its left using the A link and to the slot on its right
using the B link.

In this example, the module on the left is a MGT Module
and it connects via its A backplane port to the 10/100T-Fx
facilitating “In-Band” management (via the fiber uplink).
The module on the right is the 4Tx/L2 4-port switch module
and it connects via its B backplane port to the 10/100T-Fx
facilitating a 5-port 10/100 Ethernet switch with a fiber
uplink configuration. This 3-module configuration provides
an effective 5-port 10/100 managed switch with a fiber
uplink configuration.

This example shows how the 4Tx/L2 can be used as a
managed or unmanaged switch.

Board Mounted Dip-Switch Settings

BPA EN

BP B EN

MAN

10

HD

MAN

10

HD

P1

P2

AN

100

FD

AN

100

FD

(Port1)

(Port2)

Fig 2. Board Mounted Dip Switches

Backplane Port A “BP A EN” Dip-Switch
When the “BP A EN” dip-switch is in the “right” position
(factory setting), the A backplane Port is disabled and the
module is disconnected from the A backplane Link. When
in the “left” position, the A backplane Port is enabled and
connects the 4Tx/L2 to the A backplane Link.

Backplane Port A “BP A EN” Dip-Switch
When the “BP B EN” dip-switch is in the “right” position
(factory setting), the B backplane Port is disabled and the
module is disconnected from the B backplane Link. When
in the “left” position, the B backplane Port is enabled and
connects the 4Tx/L2 to the B backplane Link.

Port 1 “AN/MAN“ Dip-Switch:
When in “AN” (Auto-Negotiation) “right” position (factory
setting), Port 1 (P1) auto-negotiates and matches the
10/100 speed and duplex mode of a mating auto­negotiating UTP port.
When in “MAN” (Manual) “left” position, the port does
not auto-negotiate and operates in the mode selected
by the P1 “10/100” and “HD/FD” dip-switches.

Port 1 “10/100” Speed Selection Dip-Switch
When the “AN/MAN” dip-switch is in the “MAN” position,
the P1 “10/100” dip-switch selects the speed of the P1
port. When in the right “100” position (factory setting),
P1 operates at 100 Mbps. When in the left “10” position,
P1 operates at 10 Mbps.
Port 1 “HD/FD” Full/Half Duplex Dip-Switch:
When the P1 “AN/MAN” switch is in the “MAN” position,
the P1 “HD/FD” switch selects the duplex mode of the P1
port. When in the “FD” (Full Duplex) “right” position (factory
setting), P1 operates in full duplex. When in the “HD”
(Half Duplex) “left” position, P1 operates in half duplex.
Port 2 “AN/MAN“ Dip-Switch:
When in “AN” (Auto-Negotiation) “right” position (factory
setting), Port 2 (P2) auto-negotiates and matches the
10/100 speed and duplex mode of a mating auto­negotiating UTP port.

DFCS 4Tx/L2

Connec tor Type Dis t a nc e Mode l

RJ-45 100 m LMC3050C

When in “MAN” (Manual) “left” position, the port does
not auto-negotiate and operates in the mode selected
by the P2 “10/100” and “HD/FD” dip-switches.

Port 2 “10/100” Speed Selection Dip-Switch
When the “AN/MAN” dip-switch is in the “MAN” position,
the P2 “10/100” dip-switch selects the speed of the P2
port. When in the right “100” position (factory setting),
P2 operates at 100 Mbps. When in the left “10” position,
P2 operates at 10 Mbps.

Port 2 “HD/FD” Full/Half Duplex Dip-Switch:
When the P2 “AN/MAN” switch is in the “MAN” position,
the P2 “HD/FD” switch selects the duplex mode of the P2
port. When in the “FD” (Full Duplex) “right” position (factory
setting), P2 operates in full duplex. When in the “HD”
(Half Duplex) “left” position, P2 operates in half duplex.

Note that attaching an auto-negotiating UTP port to a
non-auto-negotiating (manual / forced / hard-coded)
UTP port may result in an unpredictable port setting
with excessive collisions and poor link performance.
When operating in manual mode, both mating ports
MUST be set manually to the same speed and duplex
mode.

“RJ45 Cross-Over” Slide-Switch:
When the P1 “AN/MAN” switch is in the “MAN” position,

the “RJ45 Cross-Over” slide-switch controls the “Straight­Through” or “Crossed” wiring of the P1 port. When
connecting P1 to a hub or switch, set slide-switch to the
“Switch” (factory setting) position. When connecting to a
workstation, set to “Workstation”.