Black Box ME475A Bedienungsanleitung

Reaches speeds up to

57.6 kbps.

Achieves distances

from 5.3 miles (8.5 km)

to 11. miles (18.3 km)

over 2 AWG wire.

Operates in async or

sync, point-to-point or

multipoint mode.

Provides transformer

isolation and surge

protection.

he Async/Sync Short-Haul

Modem works at distances up

to 11.4 miles (18. km) on one or

two unconditioned 24 AWG

twisted pair. It supports data rates

of up to 57.6 kbps and has a built-

in V.52 BER test pattern generator.

The modem operates in

asynchronous or synchronous

RS-2 2 mode, for half-/full duplex

4-wire or half-duplex 2-wire com-

munication over four wires. It

- Remote

- Normal

- Local

TD RD RTS CD Error Test

511 -

511E -

V.54 Test

Modes

Async/Sync Short aul Modem

Send data greater distances in just about

any RS-232 UTP or STP application.

KeyFeatures

ASYNC/SYNCSHORT-HAULMODEM

supports point-to-point or multi-

point applications and fully com-

pliant V.54 test modes (local

analog loop and remote digital

loop).

Automatic features include

equalization, gain control, and

noise filtering (a separate filter for

each data rate is built into a

custom VLSI chip).

To combat the many nemeses

of clear data transmission, the

modem includes surge protection

that guards against transients.

Transformer isolation eliminates

ground looping, and a new anti-

streaming timer stops data

streaming.

Front-panel LEDs give a clear

picture of link status, V.54 tests

can be activated remotely or via

the front panel, and the unit can

be externally configured so

there

’

s no need to open the case.

Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 724-746-5500 • www.blackbox.com • e-mail: [email protected]

Black Box Corporation.

7/27/2005 #1 741

Clocking: Internal, external, receive

Line Type: (2) twisted pair

Operation: 2-wire half-duplex or

2- or 4-wire half- or full duplex,

point-to-point or multipoint

Speed (Maximum): 57.6 kbps

Distance: 5. mi. (8.5 km) to 11.4 mi.

(18. km) over 24 AWG wire

Protocol: Synchronous or

asynchronous

User Controls: (2) toggle switches:

511/511E, Remote/Normal/Local

nterface: RS-2 2 (DCE)

Connectors: (1) DB25 female,

(1) RJ-45, (1) terminal block

ndicators: (6) LEDs: TD, RD, RTS,

CD, Error, and Test

Power: 120/2 0 VAC, 50/60 Hz,

switch-selectable

Size: 1.5"H x 4.2"W x 5"D

( .8 x 10.7 x 12.7 cm)

Weight: 1 lb. (0.5 kg)

Host

computer

PCs

Async/Sync

Short-Haul

Modem

Async/Sync

Short-Haul

Modems

Specifications

Ordering Information

ITEM CODE

Async/Sync Short-Haul Modem ............................ME475A

You might also need cable…

GigaBase®50 CAT5e, 50-MHz Bulk Cable, 4-Pair,

PVC, 1100-ft. ( 5.2-m) Boxed Reel,

Blue ................................................................EYN851A-1100

(For other colors or plenum cable, call our FREE Tech

Support.)

Connect five PCs to a

host co puter in a

ultipoint configuration.

Recognize any of these

situations?

• You wait more than 0

minutes to get through to a

vendor’s tech support.

• The so-called “tech” can’t

help you or gives you the

wrong answer.

• You don’t have a purchase

order number and the tech

refuses to help you.

• It’s 9 p. m. and you need help,

but your vendor’s tech

support line is closed.

According to a survey by Data

Communications magazine, 90%

of network managers surveyed

say that getting the technical

support they need is extremely

important when choosing a

vendor. But even though network

managers pay anywhere from 10

to 20% of their overall purchase

price for a basic service and

support contract, the technical

support and service they receive

falls far short of their

expectations—and certainly isn’t

worth what they paid.

At Black Box, we guarantee

the best value and the best

support. You can even consult our

Technical Support Experts before

you buy if you need help selecting

just the right component for your

application.

Don’t waste time and

money—call Black Box today.

WhyBuyFromBlackBox?Exceptional

Value.ExceptionalTechSupport.Period.

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