Black Box MicroNTU G.703 Series Manuel utilisateur

CUSTOMER

SUPPORT

INFORMATION

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

JUNE 1999

MT245A

MT246A

MicroNTU G.703 Card (120 ohm)

MicroNTU G.703 Card (75 ohm)

Power

Loopback

Network

Master

Clock

Normal

MicroNTU

G.703

MICRONTU G.703 CARD (120 OR 75 OHM)

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 la classe A prescrites dans le Règlement sur le

brouillage radioélectrique publié par Industrie Canada.

MICRONTU G.703 CARD (120 OR 75 OHM)

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.

MICRONTU G.703 CARD (120 OR 75 OHM)

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.

MICRONTU G.703 CARD (120 OR 75 OHM)

Contents

1. Specifications.....................................................................................................5

2. Introduction ......................................................................................................6

3. Configuration....................................................................................................7

3.1 Front-Card Configuration..........................................................................7

3.2 Rear-Card Configuration ...........................................................................9

3.2.1 Configuring the 120-Ohm Rear Card .............................................9

3.2.2 Configuring the 75-Ohm Rear Card .............................................12

4. Installation.......................................................................................................14

4.1 The MicroRack and Power Supplies .......................................................14

4.2 Installing the MicroNTU G.703 Card in the MicroRack Chassis ..........16

4.3 Connection to the G.703 Network ..........................................................17

4.3.1 Twisted-Pair (120-Ohm) Connection (MT245A).........................18

4.3.2 Dual Coax BNC (75-Ohm) Connection (MT246A).....................18

4.4 Connection to the Terminal Device .......................................................18

4.4.1 EIA-530 (RS-422) Terminal Connection (MT245A)....................18

4.4.2 X.21 Terminal Connection (MT246A).........................................19

5. Operation ........................................................................................................20

5.1 Power-Up ..................................................................................................20

5.2 LED Status Monitors ................................................................................20

5.3 Loopback Test (LAL) ..............................................................................22

Appendix. Interface Standards ..........................................................................23

CHAPTER 1: Specifications

Network Interface G.703

Network Rate 2.048 Mbps

Network Connectors MT245A: One modular RJ-45 connector

(120-ohm); MT246A: Two BNC (75-ohm)

Terminal Interface MT245A: EIA-530 (RS-422) on DB25 female;

MT246A: CCITT X.21 on DB15 female

Internal Interface Connection to MicroRack 2, 4, 8, or 16

(RM202, RM204, RM208, or RM216) midplane

architecture chassis via (2) 50-pin male card

edge connectors

Terminal Rate 2.048 Mbps

Diagnostics Loopback Test

Indicators LEDs for power, network, master clock, and

loopback test

Clocking Internal, external (network receive loop)

Fuse 400 mA for 120V applications; 200 mA for 240V

applications

Receiver Sensitivity -10 dB (0 dB = 2.4V)

Operating Temperature 32° to 140°F (0° to 60°C)

Humidity 0 to 95%, noncondensing

Altitude Up to 15,000 feet (4570 m)

Power Supply Rackmount power supply is switchable between

120 and 240 VAC; chassis supplies 10 VAC to

the MT245A/MT246A, typical consumption is

1 watt

Size 3.1"H x 0.95"W x 5.4"D (7.9 x 2.4 x 13.7 cm)

1. Specifications

MICRONTU G.703 CARD (120 OR 75 OHM)

The MicroNTU G.703 Card receives unstructured, synchronous 2.048-Mbps

data from a G.703 network and sends it to a router, bridge, multiplexor, or

other device. The Card is available in two interface options: 120-ohm twisted

pair to the network and EIA-530 (RS-422) to the terminal (part number

MT245A), or 75-ohm dual coax to the network and X.21 to the terminal

(MT246A). The EIA-530 terminal interface can also be adapted to X.21

using an EIA RS-530 to CCITT X.21 adapter cable (call Black Box).

The MicroNTU G.703 Card is designed to mount in the MicroRack 2, 4, 8,

or 16 (RM202, RM204, RM208, RM216). These operate with a switchable

120/240-VAC power supply or optional 48-VDC power supply. (The power

supply is included with the MicroRack 16. MicroRacks 2, 4, and 8 do not

include the power supply. You must purchase PS460A, the 120/240-VAC unit,

or PS461A, the 48-VDC unit, separately.) The Cards are mounted in a mid-

plane architecture: Front “function” cards and rear “interface” cards can be

hot-swapped independently, providing great flexibility.

The MicroNTU G.703 Card supports internal or external network (receive

loop) clocking. Loopback test is Local Analog Loop (LAL) via front-panel

mounted switch, and front-panel LEDs monitor power, network, master clock,

and test loop.

2. Introduction

CHAPTER 3: Configuration

The MicroNTU G.703 Card (MT245A) uses seven jumpers (or four for

MT246A), which allow the unit to be configured for a wide range of

applications. Designed around a mid-plane architecture, the MicroNTU

G.703 Card incorporates both front and rear cards. Configuration of both

may be necessary. The jumpers are accessible when the cards are slid out of

the rack chassis. Once configured, the MicroNTU G.703 Card is designed to

operate transparently, without need for frequent re-configuration: Just set it

and forget it.

3.1 Front-Card Configuration

The MicroNTU G.703 Card front card has two jumpers (LK6 and LK7), which

are mounted on the PC board (see Figure 3-1). These jumpers set clocking

and data inversion.

Figure 3-1. Jumper locations.

3. Configuration

LK7

LK6

MICRONTU G.703 CARD (120 OR 75 OHM)

LK6: Tx Clock Source

Jumper LK6 is a three-post jumper. Figure 3-2 shows the three possible

orientations of this jumper.

Figure 3-2. Possible strap positions for jumper LK6.

The setting for jumper LK6 determines whether the MicroNTU G.703 Card

will provide an internal clock, or will be receiving a clock from an external

device.

LK6 Setting

Position 1 and 2 Internal/Master Clock (Default) [Master]

Position 2 and 3 Network Clock - Slave - Network

NC Not a valid setting

3 2 1

Front of Card

3 2 1 3 2 1

CHAPTER 3: Configuration

LK7: Data Inversion

The setting for jumper LK7 determines whether data will be inverted or not

inverted.

LK7 Setting

Strap Installed Data Inverted

Strap Omitted Data Not Inverted (Default)

3.2 Rear-Card Configuration

The MicroNTU G.703 Card has two rear interface card options: for the

MT245A, 120-ohm (modular) network and EIA-530 (DB25) terminal, or,

for the MT246A, 75-ohm (dual BNC) network and X.21 (DB15) terminal.

Each is configured differently.

3.2.1 C

ONFIGURING THE

120-O

EAR

ARD

The 120-ohm rear card has five configuration jumpers (LK1 through LK5).

Figure 3-3 shows the locations of the jumpers on the 120-ohm rear card.

Figure 3-3. 120-ohm rear card jumper locations.

LK5

LK4

LK1

LK2

LK3

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