Black Box IS200A-R2 Bedienungsanleitung

Your affordable link to the ISDN network.

NTU-1 (Network Termination Unit-1)

FREE 24-hour Tech Support: 724-746-5500

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FEATURES

• Point-to-point or point-to-multipoint

configuration.

• Up to 18,000 feet (5500 meters)

operating distance.

• Easy configuration—everything you

need is on the rear panel.

• Uses standard RJ-45 jacks on all

interfaces.

• Operates automatically.

• For wallmount or desktop use.

• Power supply is included.

The NTU-1 in typical applications.

OVERVIEW

ISDN service requires an NT1 to connect the terminal

adapter to the ISDN line. If your terminal adapter doesn’t

have a built-in NT1, the NTU-1 is your affordable choice.

The NTU-1 converts the 2-wire echo-canceled 2B1Q code

from the central office to a Customer Premise 4-wire alternate

space inversion code. It supports both point-to-point and

point-to-multipoint configuration. All options and connec-

tions are accessible on the rear panel, and the NTU-1 comes

with surge protection. Also, all interfaces have standard RJ-45

jacks.

Power Information:

Wallmount Transformer—

The NTU-1 is normally powered from the wallmount

transformer. The transformer and the NTU-1 power-supply

circuitry provide 5 watts for up to two terminal devices

connected to the S/T interface. Connect the transformer’s

barrel connector to the Power jack on the rear panel. Plug

the transformer into a standard 120-VAC wall socket.

Signal Power—

The NTU-1 routes local and remote power to the signal

leads of the S or T interface. For phantom powering

applications, S/T interface connector pins 4 and 5 (Transmit)

are the negative power leads, and pins 3 and 6 (Receive) are

the positive power leads.

Remote Power—

The NTU-1 can receive backup power over the U interface

connector. The input must be a minimum of 48 VDC and

5 watts. Both local and backup power is routed to the S/T

interface connectors to power the associated terminal

equipment. Pins 7 and 8 on the U interface provide remote

power to both S/T jacks and the NTU-1.

S/T Interface

(100 ohms IN)

Multipoint S/T

Interface

(100 ohms IN)

Multipoint

S/T Interface

ISDN U Interface

fromTelco

(100 ohms IN)

ISDN U Interface

fromTelco

(100 ohms IN)

ISDN U Interface

fromTelco

(100 ohms IN)

NTU-1

(IS200A-R2)

NTU-1

(IS200A-R2)

NTU-1

(IS200A-R2)

100 ohms IN on either one of the units,

and OUT on the other

100 ohms IN on unit with

longest cable

100 ohms IN on unit with

longest cable

Up to 1 km Up to 1 km

Passive Bus

Connection

Point-to-point

connection

3 of 3

9/19/2007

#11512

724-746-5500 blackbox.com

TECH SPECS

Line Type — Basic Rate ISDN (2B1Q)

Switch Compatibility — AT&T®, Northern Telecom®, Siemens®, GTE®

Maximum Operating Distance —

U interface: 18,000 feet (5500 meters);

S/T interface: 3280 feet (1000 meters)

Operation — Full or half-duplex

Operating Mode — Point-to-point or multipoint

Indicators — (6) LEDs: Local Power (LP), Remote Power (RB), Remote Power

Reversed (RPR), Loopback (LB), Sealing Current (SC), Activity (ACT)

Connectors — (3) RJ-45 (2 for the S/T interface, 1 for the U interface)

Diagnostics — None

Temperature — Operating: 32 to 122°F (0 to 50°C);

Storage: -40 to +176°F (-40 to +80°C)

Humidity Tolerance — 10 to 95%, noncondensing

Power — 120 VAC, 60 Hz, 5 watts maximum, external supply

Size — 1.4"H x 6.3"W x 3.8"D (3.6 x 16 x 9.7 cm)

Weight — 0.6 lb. (0.3 kg)

Item Code

NTU-1 (Network Termination Unit-1) IS200A-R2

Light-emitting diodes (LEDs) display the status of certain

operating functions and will indicate if malfunctions are

occurring.

Keep these guidelines in mind when observing the NTU-1’s

LEDs:

• If a disruption occurs between the U interface and the

ISDN switch, the ACT LED flickers.

• If a disruption occurs between the S or T interface and the

TE, the ACT LED blinks once per second.

• If a disconnect occurs on both interfaces, the ACT LED goes

out.

The NTU-1’s six LEDs are:

LP (Local Power)—ON indicates the wallmount

transformer is plugged in, and 120 VAC is present.

RB (Remote Power)—ON indicates the remote power

source is connected and functional.

RPR (Remote Power Reversed)—ON indicates the remote

power source is connected, but polarity is reversed. This

must be corrected by site facilities.

LB (Loopback)—ON indicates that the telephone

company’s ISDN switch has sent a 2B+D loopback command

to the NTU-1.

SC (Sealing Current)—ON indicates a presence of metallic

termination test voltage from the ISDN switch.

ACT (Activity)—ON indicates that a link-up between

the TE and ISDN Central Office via the NTU-1 has been

achieved, and transmission can take place.

Technically Speaking

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.

Why Buy From Black Box? Exceptional Value.

Exceptional Tech Support. Period.

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