Black Box LB1350A Manual

1
October 2002
LB1350A
LB1351A
Unmanaged ( LB1350A ) and Managed
(LB1351A ) MultiLink Media Converter
User and Installation Guide
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500
or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
CUSTOMER
SUPPORT
INFORMATION

FCC STATEMENT
2
FEDERAL COMMUNICATIONS COMMISSION
AND
CANADIAN DEPARTMENT OF COMMUNICATIONS
RADIO FREQUENCY INTERFERENCE STATEMENTS
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 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 numériques de la classe A
prescrites dans le Règlement sur le brouillage radioélectrique publié par le
ministère des Communications du Canada.

NOM STATEMENT
3
Normas Oficiales Mexicanas (NOM)
Electrical Safety Statement
INSTRUCCIONES DE SEGURIDAD
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 pedestales 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 o 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 otros
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. Precaución 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 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 aparato ha sido tirado o su cubierta ha sido dañada

Black Box®LB1350A/LB1351A
4
Table of contents
1. Overview page 5
2. Planning the network with Black Box®
LB1350A/LB1351A page 5
3. Content of the shipping container page 7
4 Product general description page 8
5 Preferred Port page 9
6. Far-End-Fault ( FEF ) page 10
7 Parts identification page 11
8 Installation page 12
9 Power connection page 12
10 F/O cabling connection page 13
11 Twisted Pair cable connection page 13
12 Configuration switches page 14
13 Management Black Box® LB1351A page 14
14 Advanced Features page 15
15 Troubleshooting page 16
16 Specifications page 18
Appendix-A: Managing the Black Box® LB1351A page 19-37
Back Cover page page 40
Thank you for purchasing this Black Box®
LB1350A/LB1351A quality converter. We hope
that this guide will help you to obtain the best
results from the device while minimizing
installation time.
If you still need help installing or troubleshooting the Black Box®
LB1350A/LB1351A converter after reading the detailed information in this
guide, please call Black Box Technical Support at 724-746-5500
Note: unless where indicated otherwise, in this guide, Black Box®LB1350A/LB1351A
applies also to Black Box®LB1350A/LB1351A/SC, Black Box®LB1350A/LB1351A/ST,
BlackBox®LB1350A/LB1351A/SM15 and Black Box®LB1350A/LB1351A/SM40
TRADEMARKS
HP and OpenView are registered trademarks of Hewlett-Packard.
UL is a registered trademark of Underwriters Laboratories Incorporated.Any other trademarks mentioned
in this manual are acknowledged to be the property of the trademark owners.

Black Box®LB1350A/LB1351A
5
1 - OVERVIEW
A media-converter may be defined as a device connecting two active network
components point-to-point over a media that is different from the ports of at least one of
these devices.
An ideal media-converter should be a transparent element in the network, and its ports
may be considered as integral parts of the devices interconnected by it.The IEE802.3u
standard defines network span in terms of distances and bit times.
Conventional 100Base-TX/100Base-FX media-converters are based on repeater
technology, and they form a part of the collision domain created by the interconnected
devices. Therefore, the delay they introduce in the network severely affects the allowed
distances. Furthermore, if two class II repeaters (i.e., 2 hubs) are already present in the
same collision domain, then the use of a conventional converter is not allowed as the
repeater count may - in such case - exceed the limits. In all other cases, meticulous
PDV (Path Delay Value) must be performed prior to establishing the possible distances
for both the fiber optic (F/O) and copper segments.
The Black Box®LB1350A/LB1351A family implements a non-repeater, full re-timing
approach. It creates a Buffered Media Domain (BMD) over the F/O link, thereby
eliminating all the above mentioned limitations.
The BMD created by two Black Box®LB1350A/LB1351A devices always operates at
maximum performance - 100Mbps/Full Duplex - while interconnected devices may
operate at different rates and modes. This provides full flexibility when planning a
network.
The Black Box®LB1350A/LB1351A provides 4 (3) TP ports sharing conversion to one
FO port, with the TP ports buffered and VLAN protected between themselves, making
the device an ideal and most economical solution for both FTTH (Fiber-To-The-Home)
and FTTD (Fiber-To-The-Desk) applications.
2- Planning your Network with Black Box®LB1350A/LB1351A
Below you will find a FTTD configuration. The drawing demonstrates the versatility of
the device in terms of interconnecting – trouble-free – other devices.
In a typical Fiber –to –the - Home ( FTTH ) application
A Black Box®LB1350A/LB1351A will be deployed in a home or building and connected
by fiber to axxess switch.
It may be deployed on a floor of an apartment (office) building and 4(3) apartments
(offices) may be connected to it’s copper ports without the need to verify the type of the
network (device) within the apartment (office).Also a HUB or Switch can be connected
to any TP port according to the required network configuration.
Black Box
LB1350A/LB1351A
SERVER 10/100 SWITCH HUB (100) HUB (10)
F/O TO
ENTERPRISE
SWITCH

Black Box®LB1350A/LB1351A
6
Note: RJ-45 port No. 4 is a preferred port with enhanced functionality – see section 5.
As each of the Black Box®LB1350A/LB1351A RJ-45 port 4(3) supports: full auto-
negotiation, auto-polarity and auto-cross, you can simply connect any device to any port
by using a standard straight or crossed cable. In particular, you can connect 10Mbps or
100Mbps devices as well as HDX/FDX devices.

Black Box®LB1350A/LB1351A
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The Black Box®LB1350A/LB1351A will not only convert signals from copper to fiber
but also from 10 to 100Mbs and HDX to FDX, thus ensuring maximal distance over the
optical link.
All you need to take care of is the Speed and Duplex mode balance across the network:
if one of the local devices is HDX only capable you should force the corresponding
remote device to HDX as well to avoid buffer overflow. Same applies to devices with
10Mbps capability only.
Disregarding the interconnected device F/O link will always operate at 100Mpbs and
FDX (you may force it to HDX as well, if needed )
3 - CONTENTS OF THE SHIPPING CONTAINER
The contents of the Black Box®LB1350A/LB1351A shipping container are as follows:
• One converter Black Box®LB1350A or Black Box® LB1351A
• One AC power cord (excluding shipment to certain countries)
• Four plastic “feet”
• Management serial cable for Black Box® ( LB1351A only)

Black Box®LB1350A/LB1351A
8
4. PRODUCT GENERAL DESCRIPTION
The Black Box®LB1350A/LB1351A may be offered in the following pre-configured
versions :
LB1350A-SC Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with four RJ-45 (switched,
VLAN) ports and duplex SC connectors, Multi-mode - 2km,internal PS
LB1350A-ST Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with four RJ-45 (switched,
VLAN) ports and duplex ST connectors, Multi-mode - 2km, internal PS
LB1350A-SM15Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with four RJ-45 (switched,
VLAN) ports and duplex SC connectors, SINGLE-mode - 15km,internal PS
LB1350A-SM40Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with four RJ-45 (switched,
VLAN) ports and duplex SC connectors, SINGLE-mode - 40km,internal PS
LB1351A-SC Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with 3 RJ-45 (switched,
VLAN) ports and duplex SC connectors, Multi-mode - 2km, internal PS, SNMP Managed
LB1351A-ST Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with 3 RJ-45 (switched, VLAN) ports
and duplex SC connectors, Multi -mode - 2km, internal PS, SNMP Managed
LB1351A-SM15Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with 3 RJ-45 (switched, VLAN) ports
and duplex SC connectors, SINGLE-mode - 15km, internal PS, SNMP Managed
LB1351A-SM40Multiple 100Base-TX to single 100Base-FX Local Traffic Aggregator with 3 RJ-45 (switched, VLAN) ports
and duplex SC connectors, SINGLE-mode - 40km, internal PS, SNMP Managed
Feature Summary
• 10Base-T, 100Base-TX and 100Base-FX modes of operation
• Supports FEF feature ( Far-End-Fault ) to test Link integrity.
• Comprehensive LED support :Indicators for Link, Activity ( Tx, Rx ) , FDX,
100M, Power status and Link Test
• Hardware based 10/100, Full/Half, Flow control ,Auto-Negotiation, Auto-
cross.
• Wire speed reception and transmission
• Supports 1K Mac addresses
• Automatic address learning and address aging ( aging period is 300s)
• Frame length range : 64 ÷ 1536 bytes
Vlan tag frames are thus supported and can pass thru the converter
• Desktop , shelf ,wall mount installation, or directly in a half 19” rack.
• Port based VLAN
• VLAN Tagging support and Per port based priority, 802.1p and TOS
port based priority schemes (Black Box® LB1351A) only
• Extensive in-band SNMP management (Black Box® LB1351A)

Black Box®LB1350A/LB1351A
9
General Description
The Black Box®LB1350A/LB1351A is a shared and buffered media converter. It
converts 100Base-FX signals received on its F/O interface in 10/100Base-TX signals
and distributes them to 4(3) copper (shielded RJ-45) ports. Each of these ports is
buffered; furthermore, factory set VLAN forms groups each including one copper port
and the common F/O port, providing the users with basic security (no connection
between the users). This architecture allows 4(3) users to share one F/O link with
dramatic (up to 75%) savings.
The copper ports are auto-negotiating and will automatically adapt themselves to the
capacity of the users for highest performance (will negotiate 10/100 and FDX/HDX).
Nevertheless, in some cases it may be necessary to force certain operating modes.
For this purpose, all copper ports may be (individually) forced to 10Mbps/FDX
operation and port #4(3) (the preferred port) may be forced to any desired combination
(altogether 4 combinations) of HDX/FDX and 10/100.
Full front panel diagnostics provide information on the operation mode of every port.
The F/O port is configured by default to FDX but if desired may be set to HDX as well.
However it is essential to remember that when in HDX, the F/O link maximal distance
drops to 412m or less.
The Black Box®LB1350A/LB1351A is available with a variety of multi-mode and single-
mode interfaces with distance ranging from 2km to 40km.
The Black Box®LB1350A/LB1351A is packaged in a rugged “half rack” enclosure
allowing elegant and safe deployment in a variety of environments: desktop, 2 units on
a 19” rack-shelf or within a standard “half 19” rack (optional brackets required).
Its internal, high-power auto- range switching power supply ensures easy, safe and
error-free deployment and enhanced MTBF.
The managed version – Black Box® LB1351A – provides full in-band SNMP
manageability (both monitoring and control) - see Appendix A ( pages 19-37 )
Port priority schemes are also a part of the management.
5. PREFERRED PORT
TP port #4 of the Black Box®LB1350A (or #3 of the Black Box® LB1351A) provides
additional functionalities comparing to the other copper ports.
Full operation mode selection
While all the TP ports provide auto-negotiation and forced 10Mbps/FDX operation, this
preferred port may be set via the front panel DIP switches to force all possible operation
mode options: 10/HDX, 10/FDX, 100HDX and 100FDX. See section 12 for detailed
Dip switches setting ( page 14 ).
Recommendation: use the preferred port for connection of the most critical or
heavy traffic user of the four, even if you do not implement the special features
described above
6. Far End Fault Signaling ( FEF ) feature
When the device detects F/O Link Loss (receive side) it automatically sends a Far End
Fault signal to the remote device. If such device is another Black
Box®LB1350A/LB1351A or any device which supports such feature – then it will
indicate F/O Link Loss as well. By activating TEST mode (by TEST switch - #8 MODE
SETUP Dip switches on the front panel ) this function may be disabled .The picture
below depicts this functionality.

Black Box®LB1350A/LB1351A
10
If there is a fault in the outgoing path and the remote device is FEF compliant (see
below) then the F/O LINK LED will go OFF on both the local and remote devices. In this
way we avoid the possibility of having a FX Link ON indication at one end while, in
reality one of the data path is disrupted.

Black Box®LB1350A/LB1351A
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7 - PARTS IDENTIFICATION
Black Box®LB1350A Black Box®LB1351A COMMENTS
1 Power ON LED Power ON LED
2 TEST mode LED TEST mode LED Linked to DIP switch #8
3 Duplex SC connector Duplex SC connector
4 F/O FDX mode LED F/O FDX mode LED
5 F/O Link/Activity F/O Link/Activity Lit steady – LINK ON;
blinking - receive
6 Mode Setup (DIP)
switches Mode Setup (DIP) switches See section 12 for details ( page 16 )
7 N/A Mini DIN RS-232
connector
8 N/A Receive LED Management activity
9 N/A Ready LED Management module OK
10 RJ-45 ports 1 to 4 N/A
11 N/A RJ-45 ports 1 to 3
12 Link/Activity ports 1- 4
LED Link/Activity ports 1- 3 LED Lit steady – LINK ON; blinking - receive
13 Full Duplex ports 1-4
LED Full Duplex ports 1-3 LED Lit when FDX detected or forced
14 100Mbps ports 1-4
LED 100Mbps ports 1-3 LED Lit when 100Mbps detected or forced
NOTE: All Duplex mode LEDs – blinking indicates collisions on respective port (in HDX
mode only)

Black Box®LB1350A/LB1351A
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8 - INSTALLATION
For Half-Rack Mount installation:
Use the optional bracket kit, affix it to the unit. Then use 4 standard bolts and nuts (not
supplied), and fasten well to the rack.
Make sure to leave a gap of at least 2-3cm above the unit.
For wall mount installation
Three suitable holes on the back of the Black Box® LB1350A/LB1351A permit wall
mount Installation either horizontally (preferred) or vertically.
Two holes are 188mm apart for horizontal wall mount installation, for vertical wall mount
installation the two holes are 107mm apart.
Use two suitable screws having heads diameter less than 8mm
For Desktop use: Affix the supplied plastic “feet” (after peeling off the adhesive
protecting sheet) to the bottom of the devices, with each “foot” approximately 1 cm from
each edge.
Place the device horizontally on a hard, clean surface (desk, shelf, etc.), leaving free
space around it for natural ventilation. Avoid putting the device on other active, heat
generating equipment and avoid putting such devices on the Black
Box®LB1350A/LB1351A
19” Rack installation
Use a standard flat shelf, install it in the rack and place one or two Black
Box®LB1350A/LB1351A side by side on the shelf. Make sure to leave a gap of at least
2-3cm above the unit.
9 - POWER CONNECTION
CAUTION: When connecting a device to an AC) power outlet,
always first connect the cord to the device, and ensure that it
is securely fastened. Only afterward connect the cord to the
wall outlet .Make sure to use grounded ( 3 way ) outlets.
For each country Black Box provides with the product an appropriate power
supply cord which is safety approved in accordance with such country’s
National Electric Code
Black Box®LB1350A/LB1351A
Connect AC line voltage at the rear of the converter, using the included power cord. The
Black Box®LB1350A/LB1351A will accept any line voltage from 100 to 240 VAC, 50-60
Hz.
There is no ON/OFF switch on the device. When the power is connected to the device,
the device is ON. This will be indicated by the POWER LED ON.
Important: following any connection or setup change (sections10,11,12
below) you must reset the device by either using S9 or by disconnecting
power and reconnecting it after few seconds

Black Box®LB1350A/LB1351A
13
10 - FIBER OPTIC CONNECTION
The Black Box®LB1350A/LB1351A is equipped with either a pair of SC-type
connectors ( MM or SM models ) or ST connectors ( MM models only )
Do not remove the protective covers on the fiber connectors until you are ready to
connect the fiber optic cables. Power should be connected before attaching the fiber
optic cables. When dealing with fiber optic cables, it is essential to ensure that the TX at
one end of the link is connected to the RX at the other end of the link. Some duplex
fiber optic cables are color coded to help monitor the direction of data transmission. If
the fibers are not coded, special attention must be paid to ensure a proper connection.
CAUTION
Radiation emitted from a fiber optic connector may
be hazardous to human vision. Therefore, the
following rules must be strictly observed
All single-mode (SM) models are
CLASS I LASER PRODUCTS
And must be handled with special care
.
When not in use, keep the fiber optic connector
closed using its protective cover.
Never stare directly into the fiber optic connector
of a powered device or into the end of a fiber
connected to it.
11 - TWISTED PAIR CABLE CONNECTION
As each of the Black Box®LB1350A/LB1351A RJ-45 4(3) ports supports: full auto-
negotiation, auto-polarity and auto-cross, you can simply connect any device to any port
by using a standard straight or crossed cable. You may need to force an operation
mode other than auto-negotiation; refer to section 12 ( “ Configuration Switches “ page
14 ).
Use a shielded Cable Type 5 or higher grade, up to 100m (330ft) long to ensure proper
operation at 100Mbps.
On Black Box®LB1350A/LB1351A with the Auto-Cross feature, the RJ45 port has the
intelligence to sense the type of cable which has been connected to it and will
automatically configure itself to either MDI or MDI-X mode of operation.

Black Box®LB1350A/LB1351A
14
12 – CONFIGURATION SWITCHES
The Black Box®LB1350A/LB1351A) is equipped with an array of 10 DIP switches
marked “MODE SETUP” that facilitate the proper setting of the device and individual
ports. See section 7 ( “ Parts Identification ” page 11 )
Shaded areas indicate factory default setting.
Use a small tool (pen tip or a tiny flat-head screwdriver) to set the switches.
Switch
No. Function Up Position Down
Position Comments
1 TP port #1
operation mode 10Mbps/FDX (forced) Auto- negotiation
2 TP port #2
operation mode 10Mbps/FDX (forced) Auto- negotiation Not Connected in Black Box®
LB1351A
3 TP port #3
operation mode 10Mbps/FDX (forced) Auto- negotiation TP Port #2 in Black Box®
LB1351A
4 TP port #4
operation mode Disable A/N Auto- negotiation TP Port #3 in Black Box®
LB1351A .The port is in Auto-
Negotiation mode by default
5 TP port #4
Speed 10Mbps 100Mbps
6 TP port #4
Duplex mode Half Full
7 F/O port Duplex
mode Half Full
8 Far End Fault Disabled
(Test) Enabled (Normal) See section 6
9 Reset Normal
operation
mode
Reset Reset momentarily (move
down then up) following
any setup change
10 VLAN ports
default setting Disable Enable By default each TP port with the F/O port forms a
separate security VLAN.
In LB1351A, the internal
management port is also
included in each VLAN.
13 – MANAGEMENT (Black Box® LB1351A)
The Black Box® LB1351A is a SNMP managed device. Main features are:
a. Out-of-Band with any terminal emulation program ( RS232 port, front panel )
b. In – Band management.
c. Supported MIBs : MIB II ( RFC1213 and RFC1215 ), RFC2474 and
private MIBs.
d. The Black Box® /LB1351A converters may be managed from any SNMP
management station running popular management platforms ( e.g. HP OpenView,
SNMPc, etc )
Refer to Appendix-A “Managing the Black Box® LB1351A” ( pages 19-37 ) of this
guide for the complete setup management procedures )

Black Box®LB1350A/LB1351A
15
14. ADVANCED Features: Port Priority Schemes
The Black Box® LB1351A (only)can determine priority through three different
means.
The first method is a simple per port priority, the second is via the
802.1p frame tag and the third is by viewing the DSCP ( TOS ) field in the
Ipv4 header. Two priority levels are deployed ( High and Low )
Per Port Priority
General priority can be specified on a per port basis. In this type of priority
all traffic from the specified input port is considered high priority .
This can be useful in IP phone applications mixed with other data types . The IP phone
traffic would be high priority .
802.1p Port Priority
This method works well when used with ports that have mixed data and media flows.
The 802.1p priority tag ( 3 bits ) are used to determine frame priority. The inbound port
examines the priority field in the tag and determines the high or low priority.
VLAN tagging and priority. When frames are sent across the network, there needs
to be a way of indicating to which VLAN the frame belongs. This info is added to
the Ethernet frame in the form of a tag header.
Ethernet Frame Tag Header consists of a Tag protocol identifier ( TPID ) and Tag
control information ( TCI )
Ethernet frame :
DA SA TAG PT DATA CRC
6B 6B 4B 2B
4B Tag Header
TPID TCI
TPID is the tag protocol identifier which indicated that a tag header is following and
the TCI contains the User priority, canonical format indicator ( CFI ) and the VLAN
ID
TPID User priority CFI VLAN ID
16 b 3b 1b 12b
User priority is a 3 bit field which allows priority information to be encoded in the
frame. 8 levels of priority are allowed, where zero is the lowest and 7 is the highest
priority.(this field is used by 802.1p )
CFI : indicates presence/absence of RIF ( routing info field ) in the 802.3/Ethernet
frames.
The VLAN ID is used uniquely to identify the VLAN to which the frame belongs.
There can be a maximum of 4096 VLANs.
DSCP Port Priority
This is another per frame way to determine outbound priority.
The DSCP ( Differentiated Services Code Point – RFC 2474 ) method uses the
TOS
field in the IP header to determine high or low priority on a per code point basis.
Each fully decoded code point can have either a high or low priority.
The most significant 6 bits of the TOS field are fully decoded into 64 possibilities,(
up to 64 distinct behaviors ) and the resulted singular code is compared against the
corresponding bit in the DSCP register. ( in Black Box® LB1351A unit )

Black Box®LB1350A/LB1351A
16
If the register bit is a 1, the priority is high and if 0, the priority is low.
Thus the DSCP value classifies the packet service level.
When more than one scheme is enabled, priority conflicts are resolved by the
following order : 802.1p based priority overrides port based priority and TOS based
priority overrides 802.1p based priority
15- TROUBLESHOOTING
Problem Indication Corrective Action
No power Power LED not
lit Check that the power supply cable is firmly connected to the device and the wall
power socket.
Check that the AC input power source is
between 100 and 240VAC.
Network problems No
communication
on network
On the “mode setup switches”, check that
S9 is in the UP position. ( converter normal
operation mode )
Reset the device using S9
Any problem related to port
4 (3) or F/O port Set device to TEST mode (S8 Down), reset device (S9).If problem not solved remain in
TEST mode and perform troubleshooting.
TP link not working Link LED not lit On the “mode setup switch” move S9 to
the DOWN position, and move it back to
the UP position after one second.
Check that the connected device is
working properly at 100Mbps or 10Mbps.
Check that the connection cable is well
connected at both ends.
TP link not working at 100M
when Black Box®LB1350A
LB1351A connected to
100Mbps or 10/100Mps
device
Both Link LED
and
100BaseTX LED
not lit
On the “setup mode switches”, check that
respective switches S1 thru S4 are in
down position ( Auto-Negotiation mode )
Interchange between the suspected port
and another port 1 thru 4
Check that the connected device is
working properly at 100Mbps.
Check the interconnection between the
Black Box®LB1350A LB1351A and the
device.
Use for suspected link the preferred port
and force it to 100Mbps (S4 up, S5 down)
TP link not working at 10M
when the Black
Box®LB1350A LB1351A
connected to 10M device
(copper side).
Link LED not lit If suspected port is 1 thru 3, move
respective switch (S1 thru S3) to up
position , if port 4 – move S4 up and S5 up
Reset the device using S9
Check that the connected device is
working properly at 10Mbps

Black Box®LB1350A/LB1351A
17
Problem Indication Corrective Action
Check the interconnection between the
Black Box®LB1350A LB1351A and the
device.
Black Box®LB1350A or
LB1351A not recognizing
full duplex
FDX LED not lit Verify that connected device is FDX
capable and set to FDX properly. If HDX
then the indication is correct and you have
to setup the S7 Dip switch accordingly
Check the interconnection between the
Black Box®LB1350A/LB1351A and the
device.
Fiber link not working Link LED
(100BaseFX)
not lit
Check that the receive fiber is properly
connected to the transmit port of the
remote fiber device AND the transmit port
to the receive port of the remote device.
Remote device
reports LINK
DOWN
Change to TEST mode (S8 UP) and verify
with remote operator to establish whether
incoming or outgoing paths failed
Check that the fiber optic power is higher
than -30 dBm on the receive fiber
connector at the Black Box®LB1350A
/LB1351A end.
Check that remote device’s receive port is
properly connected to the transmit fiber
optic port of the Black Box®LB1350A
/LB1351A
Verify FDX mode of the F/O port (S7 Down)
; reset device by S9
No Link-Up after failure F/O LED OFF Disable FEF: Dip switch # 8 in Up position
(section 12 page 14)
Improper network traffic Runt and late
collision
Reset the device using S9
Check configuration (section 12 ) on the
“mode setup switches”.
Check that both ends of F/O link are set to
same mode (Half Duplex OR Full Duplex).
Check that both sides of UTP connection
are in same mode (10Mbps Half duplex OR
10Mbps full duplex OR 100Mbps Half
duplex OR 100Mbps full duplex).
If the problem persists after carrying out the above procedure, do the
following: replace the installed Black Box®LB1350A LB1351A,with
another similar device and re-perform the requested setup. If that has
solved the problem, send the faulty Black Box®LB1350A/LB1351A for
repair. If the problem still persists, there is probably some sort of
general network failure. Call Black Box Technical Support (Call 724-
746-5500 ).

Black Box®LB1350A/LB1351A
18
16.Specifications
Standard Compliance
IEEE 802.3u, IEEE802.1p, 100Base-TX, 100Base-FX, 10Base-T, FDX flow control, HDX back pressure
flow control . Supported MIBs: MIB II (RFC1213,RFC1215), RFC2474 ( DSCP ) and private MIBs.
Vlan tagging support, (Black Box® LB1351A )
Conversion Method :BMD (Buffered Media Domain), four (three) ports share one F/O link
100BaseTX ports x 4 (3)
• Shielded RJ-45 connector
• Half/full duplex support via auto-negotiation or manual (preferred port)
• 100m over UTP/STP 100ohm cat.5 cable
• Auto-polarity correction
• MDI/ MDI-X auto crossover support
•
••
•
10BaseT - Dip switches selection
100Base-FX port
• 1310nm multi-mode, SC (ST optional) connectors. Optional Single Mode
• Distance: 2000m (6500ft) when used in pairs (15/40/ km in s/m)
• Output power: -18dBm multi-mode
single-mode: - 16 / -11 dBm respectively
• Input sensitivity:
• multi-mode: -32dbm
• single mode: -30/-33 dBm respectively
• Far End Fault Signaling.
• Full/half duplex dip switch selection
Diagnostics
•
••
•
F/O port: Link/Activity, FDX
•
••
•
Each TP port: Link/Activity, FDX,100Mbps
•
••
•
Power , Test LED ( lit = FEF disabled, off = FEF enabled
Controls
F/O port: HDX/FDX
TP ports 1-3(2): a/n-10M
TP port 4(3): a/n enable/disable, force 10/100/ force HDX/FDX
System: Reset, link test ( enable / disable Far-End- Fault )
Environmental /Physical
Power supply:
Black Box®LB1350A/LB1351A 100 ÷240 VAC, 50 ÷60 Hz
•
••
•
Power consumption: 15W max.
• Storage temperature: -20°÷+ 80°C
• Operating Temperature 0°÷+ 45°C ( 32-113°F )
• Humidity: 10 ÷90% non-condensing
•
••
•
Safety: UL 1950 ): 1955, EN60950
•
••
•
Emissions: FCC part 15 subpart A, class A, VCCI
Class
ICES 003 : 1997, Class A, EMC
Directive 89 / 336/EEC
Dimensions and weight 223x44x150mm ( WxHxD )
600gram
Specifications subject to change without prior notice

Black Box®LB1350A/LB1351A
19
Appendix-A : Managing the Black Box® LB1351A
1.Preface
This appendix provides you with the necessary information for managing the
Black Box® LB1351A Traffic Aggregator (monitor and control).
In order to start managing your Black Box® LB1351A you need to setup the
management module parameters (section 2). In addition you will need to set proper
network connection (section 3) and to install the attached MIB file (section 4).
After the management parameters are set, you can manage the Black Box®
LB1351A in either of two ways: using SNMP (through a standard management
station – section 5) and using a Terminal (section 6).
2.Setting Up Management Parameters
Terminal connection
Have available a PC equipped with any terminal emulation program (any ASCII
terminal).
Use the supplied control cable to connect the converter to the PC: connect the
miniDIN end of the cable to the RS232 port on the converter and the other end to
an available DB9 (male) connector on the PC.
Configure the terminal emulation program as follows:
• baud rate: 9600
• parity: none
• start bits: 1
• stop bits: 1
• flow control: none
Start the terminal emulation then reset the device.
Startup screen
After a few seconds you will get the start up screen (figure 2-1).
Note: the parameters appearing in the figures are just examples. Set them to
the values you need.
At this point, you should immediately press any key in order to get to the
management configuration procedure. You will get a notification that will enable you
to modify the current settings by typing ‘m’ (or ‘M’).
At this stage you will be prompted with a series of questions regarding the
management parameters configuration. The configuration procedure screen is
shown here in figure 2-2. Default value for each parameter appears in braces. If you
do not wish to change a certain parameter, simply hit ‘Return’.The different
parameters are explained in detail in figure 2-2. Default value for each parameter
appears in braces.If you do not need to change a certain parameter, simply hit “
Return “.The different parameters are explained in details in figure 2-2.

Black Box®LB1350A/LB1351A
20
Management card configuration
---------------------------------------------------------------------
NETWORK PARAMETERS:
-------------------
IP address on LAN is 192.168.1.99
CONSOLE PARAMETERS:
-------------------
console channel will use a baud rate of 9600
BOARD PARAMETERS:
-----------------
Processor : MPC850, Running at 50Mhz
Board Info : Management Board
Board memory : FLASH : 4Mbytes
SDRAM : 4Mbytes
Board's Ethernet hardware address : 0:A0:D2:2F:80:82
---------------------------------------------------------------------
To change any of this, press any key within 5 seconds
Figure 2-1 – management parameters setup screen
When configuration is complete, the startup screen will appear with the new
parameters. If you still want to change any other parameters, type ‘M’ to modify.
Otherwise type ‘C’ to continue. Configuration parameters will now be saved and the
system will initialize (figure 2-3).
(M)odify any of this or (C)ontinue? [M] m
For each of the following questions, you can press <Return> to select the value shown in braces, or
you can enter a new value.
NETWORK PARAMETERS:
-------------------
Do you want a LAN interface? [Y]
This board's LAN IP address(0.0.0.0 = RARP)? [192.168.1.99]
Use a subnet mask for the LAN interface? [N] y
Subnet mask for LAN (0 for none)? [0.0.0.0]
Should there be a default gateway for packet routing? [N] y
What is its IP address? [0.0.0.0]
CONSOLE PARAMETERS:
-------------------
Baud rate for serial channels [9600]
ETHERNET PARAMETERS:
--------------------
Do you want to change the board's Ethernet address? [N] y
Byte 0 must be 00
What should byte 1 be? [A0]
What should byte 2 be? [D2]
What should byte 3 be? [2F]
What should byte 4 be? [80]
What should byte 5 be? [82]
SNMP PARAMETERS:
----------------
Get community [public]
Set community [private]
Trap destination [192.168.1.15]
Trap community [trap]
System name [FibroLAN]
System location [Israel]
System Contact [Shamir]
How long (in seconds) should CPU delay before starting up? [5]
Figure 2-2 – management parameters configuration