Black Box MT148A Manuel utilisateur

Black Box Corporation • 1000 Park Drive • Lawrence, PA 15055-1018 • Tech Support: 72 -7 6-5500 • www.blackbox.com • e-mail: [email protected]

Split one DDS line into

two high-speed

subchannels.

Easy configuration

and management.

Complete diagnostics.

Finds network faults

fast to minimize

downtime.

RS- 3 subchannel

runs at speeds up to

56 kbps; V.35 subchan-

nel operates up to

64 kbps.

Sync or async (RS- 3 )

or sync only (V.35)

operation.

f you’re craving for line savings,

Black Box has a piping-hot

solution that’s perfect for you.

The 2-Channel CSU/DSU

offers two independent high-

speed digital channels that simul-

taneously transfer data over one

DDS line. There are no monthly

bills for a second DDS line—and

no costs for additional hardware!

The CSU/DSU’s channels

operate at data rates between

2 00 bps and 56 or 6 kbps. Select

a combination of port speeds for

either async or sync operation.

The sum of the port speeds must

be less than (not equal to) the

selected line speed.

Configure Port 1 for V.35 or

RS-232 operation via its M/3 or

More for your money!

Run two channels over

a single DDS line.

KeyFeatures

2-CHANNELCSU/DSU

7/22/2005 #10700

DB25 connector. Port 2 is support-

ed with a single DB25 RS-232

interface.

Limited-distance modem

operation is also available when

the 2-Channel CSU/DSU is con-

figured with a master clock

setting. The unit can operate

error-free—up to 10 miles

(16.1 km)—at 6 kbps over

19-gauge copper wire!

A front-panel LCD display

provides a visual interface into

the unit’s menu system. The menu

system enables you to configure,

test, and monitor the unit’s

operation.

Three buttons allow for DDS

port and line settings (Advance)

management, selection of an oper-

ational display (Select), and

performing diagnostics (Enter).

Diagnostics include Self-Test,

Digital Loop, Local Loop, and

Remote Loop. The unit can quickly

isolate network faults and mini-

mize your network downtime—

and that means even greater

savings!

The 2-Channel CSU/DSU is

also foolproof. Even if the ports

are accidentally misconfigured,

a factory reset is as simple as

pressing all three buttons while

powering up. Factory reset

returns the CSU/DSU to original

settings, so you can easily fix

what went wrong.

Black Box Corporation.

Ordering Information

ITEM CODE

2-Channel CSU/DSU..................................................MT1 8A

Diagnostics: V.5 loopback tests

Speed: RS-232: 2 00, 800, and

9600 bps, 19.2, 38. , and

56 kbps (sync or async);

V.35: 2 00, 800, 9600 bps, 19.2,

38. , 56, and 6 kbps (sync

only);

DDS: 6 kbps (sync only)

Distance (Maximum): DDS circuit

(RJ- 8 connector): Up to 10 mi.

(16.1 km) at 6 kbps over

19-gauge copper cable

Command Mode: Front panel

Leads Supported: Local mapping

1–8, 15, 17, 20

Line Type: DDS

Modulation: TDM

Operation: Full duplex

Protocol: Sync or async

User Controls: (3) front-panel

buttons: Select, Advance,

and Enter

Inter ace: Channel ports: RS-232 or

V.35;

Line port: DDS

Connectors: (1) Power;

Subchannel port 1: (1) M/3

female, (1) DB25 female;

Subchannel port 2: (1) DB25

female;

DDS line port: (1) RJ- 8

Indicators: 16-character LCD

Power: 115 VAC, 60 Hz

Size: 2.5"H x 7.8"W x 6.8"D

(6. x 19.8 x 17.3 cm)

Weight: 2 lb. (0.9 kg)

Specifications

• 2-Channel CSU/DSU

• (1) RJ- 5 to RJ- 5 cable (DDS input)

• (1) Power supply

• A user’s manual

WhatthePackageIncludes

Recognize any of these

situations?

• You wait more than 30

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?ExceptionalValue.ExceptionalTechSupport.Period.

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