Black Box LT2060A User manual

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]

APRIL 1997

LT2060A

16-Port Type 3 MAU

RI RO

RESET

1 2 3 4 5 6 7 8 910 11 12 13 14 15 16

16-Port Type 3 MAU

FCC STATEMENT

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.

INSTRUCCIONES DE SEGURIDAD

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.

INSTRUCCIONES DE SEGURIDAD

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.

16-PORT TYPE 3 MAU

TRADEMARKS

IBM®and AS/400®are registered trademarks of IBM Corporation.

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

16-PORT TYPE 3 MAU

CONTENTS

1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.1 Lobe Port Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.2 RJ-45 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

1.2.1 Automatic Wrap of Ring In and Ring Out . . . . . . . .11

1.2.2 Lobe Port Initialization . . . . . . . . . . . . . . . . . . . . . . .11

1.3 Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.3.1 Category 5 Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.3.2 Type 3 Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

2.1 Token Ring Background . . . . . . . . . . . . . . . . . . . . . . . . . . .14

2.2 MAUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.1 Installation Background . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.1.1 Main Ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.1.2 Backup Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.1.3 Adjusted Ring Length . . . . . . . . . . . . . . . . . . . . . . . . .23

3.1.4 Lobe Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

3.1.5 Cable Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.1.6 Repeaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.1.7 Bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

3.1.8 16-Mbps Token Rings . . . . . . . . . . . . . . . . . . . . . . . . .24

3.2 Calculating Distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

3.3 Distance Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

3.4 Completing the Installation . . . . . . . . . . . . . . . . . . . . . . . . .32

3.4.1 Station Port Initialization . . . . . . . . . . . . . . . . . . . . . .33

3.4.2 Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . .34

4. Problem Determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

5. Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

16-PORT TYPE 3 MAU

1. Specifications

Power — No external power source is required.

Data Rate — 4 and 16 Mbps. Type 3 cable may be used at 16 Mbps when

media filters are used at the workstation or other attaching device.

Cable — See Section 1.3, Cable Specifications.

Standard — All models meet the IEEE 802.5 Standard.

Connectors — Female RJ-45. These connectors will accept either RJ-45

or RJ-11 male connectors.

Battery (for operation of port-reset feature) — 3V lithium, Duracell 1/2 AA

SE or equivalent. Field-replaceable.

Operating Temperature — 32 to 131°F (0 to 55°C)

Humidity — Up to 95% non-condensing

Size—1.72”H x 17.25”W x 6”D (4.37 x 43.82 x 15.24 cm)

Weight — 23.25 lb. (1.46 kg)

This MAU has female RJ-45 shielded lobe connectors. The connectors

labeled Ring In and Ring Out are for attachment to the token ring. The

MAU has sixteen station connectors.

The MAU also has one LED for each terminal port. When a terminal-port

LED is lit, it indicates that the device attached to that port is connected to the

token ring.

16-PORT TYPE 3 MAU

1.1 Lobe-Port Initialization

The station ports can be in an incorrect state for station attachment, and if

they are, the MAU will be inoperable until the ports are reset. Use the Reset

button to reset them.

The Reset button on the front panel is used to align the relays in the station

ports so they are ready for operation. This feature is powered by a replaceable

battery.

To operate the port-reset feature, press the Reset button. When the LED

above the Reset button lights, it indicates that the battery is operable and that

all inactive station ports will be aligned. Ports with active stations on them will

not be disturbed.

1.2 RJ-45 Connectors

The diagram below shows the transmit and receive pins in the female RJ-45

connectors.

RJ-45 Ring Out & Lobe

(ie. Station) Connectors

Transmit

Pins 4 & 5

Pin 1

Receive

Pins 3 & 6

Pin 1

RJ-45 Ring In

Connector

Transmit

Pins 3 & 6 Receive

Pins 4 & 5

Figure 1-1. RJ-45 connector transmit & receive pins

RJ-45 Ring Out & Lobe

(Station) Connectors

16-PORT TYPE 3 MAU

RJ-11 male connectors may be used instead of RJ-45 male connectors on the

twisted-pair cables used in the network. Both types will work in the female

connectors on the MAUs. Whether RJ-45 or RJ-11 male connectors are used,

the transmit and receive pins are always the four center pins in the connector,

as shown in Figure 1-1.

IMPORTANT NOTE:

The cable used with your MAUs must have at least two twisted pairs of

wire for data, no matter what cable type is used. This means a minimum

of four separate wires, whether or not you will use all four. The cable

must be wired straight-through, as shown in Figure 1-2. Do not connect

transmit and receive wires in the same twisted pair of wires.

ABCD

A, B, C, and D represent the four center pins of the RJ45 connector.

A & D in the same pair

B & C in the same pair

Pin 6

Pin 3

Figure 1-2. Correct RJ-45 connector and cable wiring.

16-PORT TYPE 3 MAU

1.2.1 A

UTOMATIC

RAP OF

ING

N AND

ING

When no connector is inserted into Ring In or Ring Out ports, the port will

automatically wrap, or loop back, to utilize the backup path. The backup path

is described in Section 4.1, Installation Background.

1.2.2 L

OBE

-P

ORT

NITIALIZATION

The station ports can be in an incorrect state for station attachment, and if

they are, the MAU will be inoperable until the ports are reset. Use the reset

button to reset them.

The Reset button on the front panel is used to align the relays in all inactive

station ports so they are ready for operation. This feature is powered by a

replaceable battery.

To operate the port-reset feature, press the Reset button. When the LED

above the Reset button lights, it indicates that the battery is operable and that

all inactive station ports will be aligned. Ports with active stations on them will

not be disturbed.

1.3 Cable Specifications

1.3.1 C

ATEGORY

5 C

ABLE

This cable has been defined by the EIA/TIA as the cable of choice for data

applications up to 100 Mbps. See EIA/TIA specification #568 A/B for

building wiring recommendations.

• UTP and STP available

• 22 and 24 gauge generally available

• Impedance 100 ohms (15% from 512 kHz to 100 MHz)

• Maximum attenuation is 67.0 dB per 1,000 at 100 MHz.

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