Black Box LT0009A Manuale utente

FEBRUARY 1997

LT0009A

LT0009A-UTP

Lobe Access Unit

CUSTOMER SUPPORT INFORMATION

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 724-746-0746

Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: www.blackbox.com • E-mail: [email protected]

LOBE ACCESS UNIT

TRADEMARKS USED IN THIS MANUAL

IBM is a registered trademark of IBM Corporation.

All applied-for and registered trademarks are the

property of their respective owners.

LOBE ACCESS UNIT

DECLARATION OF CONFORMITY

The products listed in this manual conform to the following standard(s) or

other normative document(s):

EMC: EN 55022 (1994): Limits and methods of measurement of radio

disturbance characteristics of information technology equipment.

EN 50082-1 (1992): Electromagnetic compatibility—Generic

immunity standard for residential, commercial, and light

industry.

Supplementary Information: The products herewith comply with the

requirements of the EMC Directive 89/336/EEC. The products were tested

in a typical configuration.

LOBE ACCESS UNIT

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 J

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.

LOBE ACCESS UNIT

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

LOBE ACCESS UNIT

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.

LOBE ACCESS UNIT

Operating Voltage — 4.5 ±0.7 volts

Operating Current — 1.0 mA @ 5 VDC

Resistance TX to RX — 4.8 ±0.2 kΩ

Insertion Time — 5 seconds

Removal Time — 50 to 200 msec

Insertion Loss (Maximum) —

0.5–4 MHz 4–16 MHz 16–32 MHz

SUB TX to SUB RX 0.65 dB 1.3 dB 2.6 dB

MAIN RX to SUB RX 0.85 dB 1.8 dB 3.7 dB

SUB TX to MAIN TX 0.85 dB 1.8 dB 3.7 dB

Crosstalk (Maximum) —

10 KHz 0.5–4 MHz 4–16 MHz

SUB TX to SUB RX 55 dB 43 dB 37 dB

SUB WRAP to MAIN 50 dB 40 dB 35 dB

Return Loss (Minimum) —

1–6 MHz 6–12 MHz 12–24 MHz

20 dB 14 dB 11 dB

1. Specifications

LOBE ACCESS UNIT

Common Mode Rejection (Minimum) —

1–6 MHz 6–12 MHz 12–24 MHz

40 dB 28 dB 25 dB

Electrical Connectors — LT0009A: MAIN:

(1) DB9 female; SUB-1

through -4: (1) DB9

male each; LT0009A-

UTP: MAIN: (1) RJ-45

female; SUB-1 through

-4: (1) RJ-45 female each

Indicators — (4) Red LEDs; lobe

activity

MTBF — 98,398 hours

Certification — CE

Operating

Temperature — 32 to 122°F (0 to 50°C)

Relative Humidity

Tolerance — 10 to 90%,

noncondensing

Size — 1.4"H x 4.4"W x 7.3"D

(3.6 x 11.2 x 18.5 cm)

Weight — 0.8 lb. (0.4 kg)

LOBE ACCESS UNIT

2.1 Description

The Lobe Access Units are lobe extenders that

quadruple the lobe capacity of the standard Token

Ring MAU. The Lobe Access Unit increases the

flexibility of the Token Ring network by enabling its

topology to be expanded in a more cost-effective way.

It is especially designed to eliminate the need for an

additional MAU in situations where extra lobes are

needed. By using Lobe Access Units to add

workstations to the ring in place of extra lobe

cabling, overall design costs are reduced.

Connect four workstations to a single lobe with the

Lobe Access Unit. Or, an internal switch enables the

Lobe Access Unit to operate as a standalone access

unit. (See Figure 2-1.)

The LT0009A has five ports, each using DB9

connectors. The MAIN port is female, and the four

sub-ports are male. The LT0009A-UTP also has five

ports, but these use RJ-45 connectors. All five ports

are female.

2. Introduction

LOBE ACCESS UNIT

To ensure proper operation, you’ll need to use an

initialization tool (our part number LT037) during

the initial setup. This will need to be ordered

separately.

The Lobe Access Unit is small, lightweight, and easy

to install. No strapping adjustments or external

power supply are required.

Figure 2-1. Use as a standalone unit or connect

four workstations to a single lobe.

Standalone operation

Lobe Access

Unit Lobe Access

Unit

MAU

4 workstations connected

to a single lobe

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