Black Box LH1700A-SC-US User manual

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax [phone]
© Copyright 2003. Black Box Corporation. All rights reserved.

MAY 2003
100BASE-TX to 100BASE-FX
Media Converters
CUSTOMER SUPPORT INFORMATION
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: [email protected]
LH1700A-SC-US LH1700A-ST-UK LH1701A-SC-JP
LH1700A-SC-EU LH1700A-ST-AU LH1702A-SC-US
LH1700A-SC-UK LH1700A-ST-JP LH1702A-SC-EU
LH1700A-SC-AU LH1701A-SC-US LH1702A-SC-UK
LH1700A-SC-JP LH1701A-SC-EU LH1702A-SC-AU
LH1700A-ST-US LH1701A-SC-UK LH1702A-SC-JP
LH1700A-ST-EU LH1701A-SC-AU

1
FCC AND IC RFI STATEMENTS
FEDERAL COMMUNICATIONS COMMISSION
AND
INDUSTRY CANADA
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 Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par Industrie Canada.

2
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
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.

3
NOM STATEMENT
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.

4
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
TRADEMARKS USED IN THIS MANUAL
ST is a registered trademark of AT&T.
Any other trademarks mentioned in this manual are
acknowledged to be the property of the trademark owners.

5
CONTENTS
Contents
Chapter Page
1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 What the Package Includes . . . . . . . . . . . . 11
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 MDI/MDI-X Connection . . . . . . . . . . . . . 12
3.2 Autonegotiation (N-Way) Switch . . . . . . . 13
3.3 Typical Applications . . . . . . . . . . . . . . . . . 15
3.4 Installing the Converter. . . . . . . . . . . . . . . 17
4. LED Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . 19
5. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Calling Black Box. . . . . . . . . . . . . . . . . . . . 21
5.2 Shipping and Packaging . . . . . . . . . . . . . . 22

6
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
1. Specifications
NOTE
In this manual (except where noted otherwise):
• LH1700A-ST represents models LH1700A-ST-US,
LH1700A-ST-EU, LH1700A-ST-UK, LH1700A-ST-AU, and
LH1700A-ST-JP.
• LH1700A-SC represents models LH1700A-SC-US,
LH1700A-SC-EU, LH1700A-SC-UK, LH1700A-SC-AU,
and LH1700A-SC-JP.
• LH1701A-SC represents models LH1701A-SC-US,
LH1701A-SC-EU, LH1701A-SC-UK, LH1701A-SC-AU,
and LH1701A-SC-JP.
• LH1702A-SC represents models LH1702A-SC-US,
LH1702A-SC-EU, LH1702A-SC-UK, LH1702A-SC-AU,
and LH1702A-SC-JP.
Operation: Half or full duplex
Standards: IEEE 802.3u 100BASE-TX/100BASE-FX
Maximum Distance: Twisted pair: 328 ft. (100 m);
Fiber: LH1700A-ST, LH1700A-SC: 1.2 mi. (2 km)
over multimode fiberoptic cable;
LH1701A-SC: 9.3 mi. (15 km) over single-mode
fiberoptic cable;
LH1702A-SC: 18.6 mi. (30 km) over single-mode
fiberoptic cable

7
CHAPTER 1: Specifications
User Controls: (1) Button for MDI/MDI-X connection;
(1) ON/OFF N-Way switch for autonegotiating speed
and duplex operation
Connectors: LH1700A-ST: (1) RJ-45, (2) ST®,
(1) barrel connector for Power;
LH1700A-SC, LH1701A-SC, LH1702A-SC:
(1) RJ-45, (2) SC, (1) barrel connector for Power
Indicators: (6) LEDs: (2) Link, (2) Receive, (1) Full
Duplex, (1) Power
Temperature Tolerance:
Operating: 32 to 158°F (0 to 70°C);
Storage: -4 to +158°F (-20 to +70°C)
Relative Humidity:
Operating: Up to 80%, noncondensing;
Storage: Up to 90%, noncondensing

8
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
Power: All models: External power supply:
Output: 12 VDC @ 0.8 A;
LH1700A-ST-US, LH1700A-SC-US, LH1701A-SC-US,
LH1702A-SC-US: Input: 120 VAC, 60 Hz (2-prong);
LH1700A-ST-EU, LH1700A-SC-EU, LH1701A-SC-EU,
LH1702A-SC--EU: Input: 230 VAC, 50 Hz (2-prong);
LH1700A-ST-UK, LH1700A-SC-UK, LH1701A-SC-UK,
LH1702A-SC--UK: Input: 230 VAC, 50 Hz (3-prong);
LH1700A-ST-AU, LH1700A-SC-AU, LH1701A-SC-AU,
LH1702A-SC-AU: Input: 240 VAC, 50 Hz, (3-prong);
LH1700A-ST-JP, LH1700A-SC-JP, LH1701A-SC-JP,
LH1702A-SC--JP: Input: 100 VAC, 50/60 Hz (2-prong)
Size: 0.9"H x 2.9"W x 4.3"D (2.3 x 7.4 x 10.9 cm)
Weight: 0.3 lb. (0.1 kg)

9
CHAPTER 2: Introduction
2. Introduction
2.1 Description
The 100BASE-TX to 100BASE-FX Media Converters
connect your twisted-pair Fast Ethernet to multimode or
single-mode fiber without adding to your repeater
count.
Available models include:
• LH1700A-ST: This model extends your Fast
Ethernet network up to 1.2 mi. (2 km) over
820-nm multimode fiberoptic cable via ST
connectors.
• LH1700A-SC: Choose this model to extend your
Fast Ethernet network up to 1.2 mi. (2 km) over
820-nm multimode fiberoptic cable using SC
connectors.
• LH1701A-SC: Use this converter to extend your
100-Mbps Ethernet network up to 9.3 mi. (15 km)
over 1310-nm single-mode fiberoptic cable via SC
connectors.

10
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
• LH1702A-SC: This converter is the same as the
LH1701A-SC, but it extends your network up to
twice the distance (18.6 mi. [30 km]).
Figure 2-1. 100BASE-TX to 100BASE-FX Media Converter
with ST connectors.
Figure 2-2. 100BASE-TX to 100BASE-FX Media Converter
with SC connectors.

11
CHAPTER 2: Introduction
2.2 What the Package Includes
• (1) 100BASE-TX to 100BASE-FX Media Converter
• (1) AC adapter
• (4) Non-skid rubber feet
• (2) Mounting screws
• This users’ manual
If anything is missing or damaged, please contact Black
Box at 724-746-5500.

12
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
3. Installation
3.1 MDI/MDI-X Connection
Before plugging in and installing your media converter,
you’ll need to set the MDI/MDI-X button. This button
selects whether you need to use crossover or straight-
through twisted-pair cabling to connect the RJ-45 ports
on the 100BASE-TX portion of your network. (See
Figure 3-1.) Simply set the button as described in
Table 3-1.
Figure 3-1. MDI/MDI-X button.
NOTE
When the button is pressed in, MDI-X is selected. When the
button is out, MDI is selected.
MDI/MDI-X button

13
Table 3-1. Crossover selection.
Connected Device Cable Configuration Setting
Hub or switch Straight-through MDI-X
Hub or switch Crossover MDI
DTE (NIC) Straight-through MDI
DTE (NIC) Crossover MDI-X
3.2 Autonegotiation (N-Way) Switch
Once you’ve set the MDI/MDI-X button, you’ll need to
set the Autonegotiation (N-Way) switch. See Figure 3-2.
Figure 3-2. Location of N-Way switch on the side panel.
Use the ON/OFF Autonegotiation switch to enable or
disable autonegotiating 10- or 100-Mbps speed and half-
or full-duplex operation.
CHAPTER 3: Installation
Autonegotiation (N-Way) switch

14
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
When the switch is ON, autonegotiation operation
mode is enabled.
When the switch is OFF, autonegotiation operation
mode is disabled. Set the switch to OFF when connec-
ting to an autosensing, not an autonegotiating, switch.
NOTE
An autonegotiating switch automatically detects and adjusts
for 10- or 100-Mbps operation AND full- or half-duplex
operation. An autosensing switch detects and adjusts for
10- or 100-Mbps, but does NOT adjust for full- or half-
duplex operation.
NOTE
If you have any of the following problems, please check to
see if the N-Way switch is properly set.
1. The Link LED is not lit and the connection cannot be
established.
2. The Link LED is lit and the connection is OK, but the
converter cannot transmit or receive data.
3. The converter functions properly for awhile, then it
does not work. If you power off/on the converter, then it
works properly again.

15
CHAPTER 3: Installation
3.3 Typical Applications
Once you’ve set the MDI/MDI-X button and N-Way
switch, you’ll need to determine which application you’ll
use. See Figures 3-3 through 3-5.
E XAMPLE 1: T WO LAN S WITCH W ORKGROUPS
Figure 3-3. Converters connecting two LAN switch workgroups.
Fast Ethernet
switch Fast Ethernet
switch
100BASE-TX to
100BASE-FX
Media
Converters
328 ft.
(100 m)
328 ft.
(100 m)
328 ft.
(100 m)
328 ft.
(100 m)
UTP
UTP
Multimode fiber cable, half duplex
(LH1701A-SC-US: 9.3 mi. [15 km];
LH1702A-SC-US: 18.6 mi. [30 km])

16
100BASE-TX TO 100BASE-FX MEDIA CONVERTERS
E XAMPLE
2: A LAN S WITCH AND A N ETWORK S ERVER
Figure 3-4. Converters connecting a LAN switch
and a network server.
E XAMPLE 3: A LAN S WITCH AND A W ORKSTATION
Figure 3-5. Converters connecting a LAN switch
and a workstation.
Workstation
Fast Ethernet switch
100BASE-TX to
100BASE-FX
Media
Converters
UTP
328 ft.
(100 m) 328 ft.
(100 m)
328 ft.
(100 m)
Multimode fiber cable, half duplex
(LH1701A-SC-US: 9.3 mi. [15 km];
LH1702A-SC-US: 18.6 mi. [30 km])
Server
Fast Ethernet switch
100BASE-TX to
100BASE-FX
Media
Converters
328 ft.
(100 m)
328 ft.
(100 m)
328 ft.
(100 m)
328 ft.
(100 m)
UTP
UTP
Multimode fiber cable, half duplex
(LH1701A-SC-US: 9.3 mi. [15 km];
LH1702A-SC-US: 18.6 mi. [30 km])

17
CHAPTER 3: Installation
3.4 Installing the Converter
After you set the MDI/MDI-X button as described in
Section 3.1, set the Autonegotiation (N-Way) switch as
explained in Section 3.2, and determine how you will
use your converter as shown in Section 3.3, you’ll need
to place the converter on a desktop or mount it on a
wall. Next, power on the converter. Connect the
converter to a 100BASE-TX device or network segment.
Finally, connect the converter to a 100BASE-FX device
or to another media converter via fiberoptic cable.
Follow the steps listed below:
1. For desktop installation, affix the four non-skid
rubber feet to the bottom of the converter.
For wallmount installation, use the underside of
the converter as a template to measure and mark
out the position of the holes onto the surface
where you will install the converter. Then use the
two mounting screws provided to mount the
converter firmly in place.
2. Connect the appropriate power supply for your
country to the power connector on the side of the
converter. Plug the power supply into a suitable
power outlet.