Black Box LT2060A Manuale utente
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
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
3
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.
4
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.
5
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.
6
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.
7
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
8
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.
9
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
10
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
DD
A
C
B
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.
11
16-PORT TYPE 3 MAU
1.2.1 A
UTOMATIC
W
RAP OF
R
ING
I
N AND
R
ING
O
UT
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
I
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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