Telenetics NT1D User manual

Brand: Telenetics

Model: NT1D

Type: User manual

Telenetics NT1D is a network termination device designed for the ISDN basic rate communication system. It effectively converts the central office 2-wire echo cancelled 2B1Q code to a customer premise 4-wire alternate space inversion code making it suitable for a variety of point-to-point and point-to-multipoint configurations. Surge protection ensures the longevity of the device and any connected peripherals. All options and connections are conveniently accessible on the rear panel. The NT1D comes with a wall transformer and U interface cable for easy installation.

NT1D

Network Termination Device

Telenetics Corporation Doc. TEL–6 457 5036 03 014

25111 Arctic Ocean February 2001

(949) 455-4000

Published by Telenetics, who reserves the right to make improvements in the products

described in this manual as well as to revise this publication at any time and without notice to

any person of such revision or change.

electronic retrieval system, translated into any language or computer language, or be

transmitted in any form whatsoever without the prior written consent of the publisher. For

additional information contact

Telenetics

25111 Arctic Ocean

Lake Forest California 92630

(949) 455-4000

TRADEMARKS

Telenetics® is a registered trademark of Telenetics Corporation.

NOTICE

All titles, versions, trademarks, claims of compatibility, etc., of hardware and software

products mentioned herein are the sole property and responsibility of the respective vendors.

Telenetics makes no endorsement of any particular product for any purpose, nor claims

responsibility for its operation and accuracy.

UPDATES

Updates to the products and the manual are obtainable at participating Telenetics dealers and

distributors, or directly from Telenetics on the same terms and conditions as those offered by

Telenetics to its registered customers as verified by the completion and return of the

registration form to Telenetics.

iii

FCC REQUIREMENTS

WA R N I N G

This equipment generates and uses radio frequency energy. If not

installed and used in accordance with the manufacturer's instructions,

it could cause interference to radio and television reception. It has

been type tested and complies with the limits for a Class B computing

device in accordance with the specifications in Part 15 of the FCC

Rules designed to provide reasonable protection against interference in

a residential installation. There is no guarantee that interference will

not occur. If this equipment causes interference to radio or television,

as determined by turning the equipment off and on, the user is encour-

aged to correct the interference by using the following measures:

Reorient the receiving antenna.

Relocate the computer with respect to the receiver.

Plug the computer into a different outlet so the computer and receiver are on

different branch circuits.

Changes or modifications to this unit not expressly approved by the party responsible for

compliance could void the user's authority to operate the equipment.

If necessary, the user should consult the dealer or a radio / television technician for additional

suggestions. The following booklet prepared by the Federal Communication Commission is

helpful: “How to Identify and Resolve Radio-TV Interference Problems.” This booklet is

available from the US Government Printing Office, Washington, DC 20402, Stock No.

004-000-00345-4.

SHIELDED CABLES

This product has been tested and complies with FCC limits for a Class B computing device.

Testing was done with shielded computer cables. Using unshielded cables could cause your

system to emit excess radio frequency, increasing the chance of interference. To comply with

FCC regulations it is necessary to use shielded computer cables with your installation.

UL REQUIREMENTS

Caution

The Exclamation Point within an equilateral triangle

is intended to alert the user to the presence of impor-

tant operating and maintenance (servicing) instruc-

tions in the literature accompany the appliance.

Caution

Level C power systems are rated 48 Vdc, 1.3 amps

maximum.

INDUSTRY CANADA (IC) REQUIREMENTS

IC labels are affixed to each unit sold in Canada. This label has the certification number for

that particular unit. The numbers are different for each model.

The Industry Canada label identifies certified equipment. This certification means that the

equipment meets certain telecommunications network protective, operational, and safety

requirements. IC does not guarantee the equipment will operate to the user’s satisfaction.

Before installing this equipment, users should ensure that it is permissible to be connected to

the facilities of the local telecommunications company. The equipment must also be installed

using an acceptable method of connection. In some cases, the company’s inside wiring

associated with a single line individual service may be extended by means of a certified

connector assembly (telephone extension cord). The customer should be aware that

compliance with the above conditions may not prevent degradation of service in some

situations.

Repairs to certified equipment should be made by an authorized Canadian maintenance

facility designated by the supplier. Any repairs or alterations made by the user to this

equipment, or equipment malfunctions, may give the telecommunications company cause to

request the user to disconnect the equipment. For their own protections users should ensure

that the electrical ground connections of the power utility, telephone lines and internal

metallic water pipe system, if present, are connected together. This precaution may be

particularly important in rural areas.

CAUTION

Users should not attempt to make installation connections themselves,

but should contact the appropriate electric inspection authority or

electrician.

CANADIAN EMISSION REQUIREMENTS

This Class B digital apparatus meets all requirements of the Canadian Interference-Causing

Equipment Regulations.

Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le

matériel brouilleur du Canada.

Table of Contents

NT1D User’s Guide

INTRODUCTION................................................................... 1

PHYSICAL DESCRIPTION ..................................................1

FEATURES .............................................................................2

ISDN Features .................................................................. 2

Compliance ...................................................................... 2

INSTALLATION AND USE ..................................................2

Receipt Inspection ............................................................ 2

Site Preparation ................................................................ 3

Wall Mounting ................................................................. 3

DIP Switch Options .......................................................... 3

ISDN and Terminal Hookup ............................................ 5

CONNECTOR PINS ...............................................................6

NT1D to ISDN U Interface .............................................. 6

NT1D to Terminal Endpoint Equipment .......................... 7

WALL MOUNT TRANSFORMER .......................................7

REMOTE POWER ..................................................................8

SIGNAL POWER ...................................................................8

OPERATION ..........................................................................8

LED INDICATORS ................................................................8

SPECIFICATIONS .................................................................9

List of Figures

Figure 1 Typical ISDN Interface Arrangements ..................... 1

Figure 2 Terminating Resistor Settings...................................4

Figure 3 Location of DIP Switch ............................................5

NT 1D 1

NT1D

User’s Guide

INTRODUCTION

The Telenetics network termination device, NT1D, is designed

for the ISDN basic rate communication system. It installs

between the Central Office U interface, and the Customer

Premise S or T interface. It effectively converts the central office

2-wire echo canceled 2B1Q code to a customer premise 4-wire

alternate space inversion code (Figure 1). Both point to point and

point to multi-point configurations are supported.

Figure 1. Typical ISDN Interface Arrangements.

PHYSICAL DESCRIPTION

The NT1D can reside on a desk or be wall mounted. Six light

emitting diodes (LEDs) show unit status. The rear panel houses

the power jack, two jacks for either an S or T interface to the CP

equipment, one U jack for connection to the CO, and one 4-posi-

tion dip switch for terminating resistor selection. Power is sup-

plied by the wall transformer which also provides power to the

associated terminal devices via the S/T jacks.

NT1D User’s Guide

2NT 1D

Features

• Wall mount or desktop use

• Point to point or point to multi-point configuration

• Surge protection

• All options and connections accessible on the rear panel

• Up to 18k feet operating distance

• 2B1Q to alternate space inversion interface coding

• Standard RJ45 jacks on all interfaces

• Wall transformer and U interface cable included

• Automatic remote (backup) power pickup

• ISDN Features

• Loss of power "dying gasp" notification

• Embedded operations channel 2B+D loopback

• Integral metallic termination circuit (sealing current)

• Warm start activation

• Remote activated quiet mode and insertion loss tests in

maintenance modes

• Compliance

• Compliant with the following standards:

• ANSI T1.601-1992 network side*

• ANSI T1.605-1991 terminal side

INSTALLATION AND USE

Receipt Inspection

After unpacking the unit, check the contents against the packing

list. Inspect for damage that may have occurred in shipment. If

there is damage or material shortage, contact the shipping agent

and Telenetics for assistance.

* The capacitance for the NT1D may appear to be substantially larger than 1.0 µF

as described by section 7.5.2.3 of ANSI T1.601-1992.

NT1D User’s Guide

NT 1D 3

Site Preparation

The installation area should be free from extremes of tempera-

ture, humidity, shock, and vibration. Allow sufficient space for

cable clearance. For wall mount applications, a template inside

the rear cover of this manual is provided to help locate the retain-

ing screw holes.

Caution

We recommend that you use a surge pro-

tection device for this product. Unplug

your equipment during lightning storms to

avoid possible damage.

Caution

For wall mount applications, orient the

NT1D with connectors and cables exiting

downward. Ensure LEDs are visible dur-

ing operation.

Wall Mounting

Using the template found in the back of this guide, mark the sur-

face and insert three number 6 pan head type screws. Allow screw

heads to protrude 1/10 inch from flush. When all three screws are

inserted, position the NT1D in place engaging the screw heads

and slide to the right until secure. Screws may have to be adjusted

for a snug fit.

☞ Note

On some installations it may be easier to make connections or

position dip switches before wall mounting.

DIP Switch Options

At the time of installation the 100 ohm terminating resistors must

be set to match the application as illustrated in Figure 2.

NT1D User’s Guide

4NT 1D

Figure 2. Terminating Resistor Settings.

DIP switch S1 positions 1 and 4 control the resistors. S1-1 selects

the transmit resistor and S1-4 selects the receive resistor. The ON

(down) position puts the terminating resistors in the circuit. The

switch is accessible from the rear panel and is numbered and

labeled (See Figure 3). The NT1D is shipped with all switches

ON. (S1-2 and -3 are not active.)

NT1D User’s Guide

NT 1D 5

Figure 3. Location of DIP Switch.

The factory setting should satisfy most installations. S/T interface

links having unusual characteristics may see improved perfor-

mance by putting resistors in or out of the circuit. The units on

the opposite end of the S/T line also have terminating resistors

that must be considered. As a general rule, the units at either end

have the resistance in while add on nodes have resistance out.

Table 1 shows switch settings.

ISDN and Terminal Hookup

Connecting the NT1D is simple and straight forward. The sup-

plied U cable inserts into the U jack on the NT1D, the opposite

end connects to the ISDN wall jack.

Similar cables are used to connect the S/T jacks to the designated

Terminal Endpoint equipment.

Table 1. DIP Switch Functions

DIP

Switch

Positions

Transmit Resistor Receive Resistor

OFF ON* OFF ON*

NT1D User’s Guide

6NT 1D

CONNECTOR PINS

The NT1D connects to the CO and CPE with standard 8-pin RJ45

modular connectors. All connections are on the rear panel and

labeled for use.

NT1D to ISDN U Interface

The U jack connects the NT1D to the ISDN. Pin functions are

shown below:

S1-1 100 ohms out 100 ohms in

S1-2

S1-3

S1-4 100 ohms out 100 ohms in

* Default

Pin Function

1Not used

2Not used

3Not used

4 Transmit to/Receive from ISDN network

5 Transmit to/Receive from ISDN network

6Not used

7 Remote power source (-)

8Remote power source (+)

Table 1. DIP Switch Functions

NT1D User’s Guide

NT 1D 7

NT1D to Terminal Endpoint Equipment

The S/T jacks connect the NT1D to the terminal equipment.

Either jack can be an S interface or a T interface. Pin functions

are shown below:

WALL MOUNT TRANSFORMER

The NT1D is normally powered from the wall mount transformer.

The transformer and NT1D power supply circuitry provides 5

watts for up to two terminal devices connected to the S/T inter-

face. Connect the transformer barrel connector to the Power jack

on the rear panel. Plug the transformer into a standard 120 Vac

wall socket.

International models may operate from mains voltages other than

120 Vac. The wall mount transformer will be clearly marked with

the required mains voltage.

Pin Function

1Not used

2Not used

3 Receive + from terminal equipment

4 Transmit + to terminal equipment

5 Transmit - to terminal equipment

6 Receive - from terminal equipment

7 Terminal equipment power (-)

8 Terminal equipment power (+)

NT1D User’s Guide

8NT 1D

REMOTE POWER

The NT1D can receive remote (backup) power over the U inter-

face connector. The input must be nominally 48 Vdc and 5 watts

minimum. Both local and backup power is routed to the S/T inter-

face 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 NT1D.

Caution

Level C power systems are rated 48 Vdc,

1.3 amps maximum.

☞ Note

Remote power must be provided to the wall jack U connection

by the site facilities.

SIGNAL POWER

The NT1D routes local and remote power to the signal leads of

the S/T interface. For phantom powering applications, S/T inter-

face connector pins 4 & 5 (transmit) are the negative power leads

and pins 3 & 6 (receive) are the positive power leads.

OPERATION

After installation and configuration the NT1D operates automati-

cally and unattended.

LED INDICATORS

The LEDs display certain operating functions and will indicate if

malfunctions are occurring.

LP LOCAL POWER - ON indicates the wall mount trans-

former is plugged in and 120 Vac is present.

RP REMOTE POWER - ON indicates the remote power

source is connected and functional.

NT1D User’s Guide

NT 1D 9

RPR REMOTE POWER REVERSED - ON indicates the

remote power source is connected but polarity is reversed.

This must be corrected by the site facilities.

LB LOOPBACK - ON indicates the ISDN switch has sent a

2B+D loopback command to the NT1D.

SC SEALING CURRENT - ON indicates presence of the

metallic termination test voltage from the ISDN switch.

ACT ACTIVITY - ON indicates that a link-up between the TE

and ISDN CO via the NT1D has been achieved and trans-

mission can take place.

If a disruption occurs between the U interface and the

ISDN switch, the LED flickers (8Hz).

If a disruption occurs between the S/T interface and the

TE, the LED blinks once per second (1Hz).

If a disconnect occurs on both interfaces, the LED goes

out.

SPECIFICATIONS

Power Consumption: 5 Watts maximum

Wall Mount Transformer Output: 28 Vac

Physical Dimensions: 6.3 x 5.1 x 1.5 inches

Weight (with transformer): 2.5 pounds

Operating Temperature: 0 to 50 deg. C (32 to 122 F)

Humidity: 0 to 95% non condensing

Maximum Operating Distance U interface: 5500 meters (18000 feet)

Maximum Operating Distance S/T interface: 1000 meters (3280 feet)

U Interface Coding: 2B1Q

S/T Interface Coding: Alternate Space Inversion

10 NT 1D

Service and Return Procedures-1

Service and Return Procedures

Contents

Equipment Return Procedures ................................................... 2

Expiration of Lease ............................................................... 2

Factory Repair ...................................................................... 2

Packaging Guidelines for Equipment Return ....................... 3

Service and Return Procedures

Service and Return Procedures-2

The following sections apply to U.S. customers only. Non-U.S.

customers with questions or concerns regarding return procedures

should contact their Telenetics subsidiary or distributor.

Equipment Return Procedures

If you have questions about equipment return procedures, call the Logis-

tics Administration Group at (949) 455-4000 for advice and assistance.

If you require either on-site service or unit-exchange service, call Tele-

netics at (949) 455-4000.

Expiration of Lease

To return equipment upon expiration of a lease agreement, contact your

Telenetics Sales Office for return authorization and instructions. A list

of these offices follows. When you contact the sales office, you will be

asked to provide the following information:

• Product name and description

• Serial number

• Customer order number

• Reason for return

Factory Repair

To return equipment for factory repair, call Telenetics at (949) 455-

4000, for return authorization and instructions. When you call, you will

be given a Return Material Authorization (RMA) control number. Mark

this number clearly on the shipping container for ease of identification

and faster service. The RMA control number provides a convenient

tracking reference for both parties. Please have the following

information available for each piece of equipment you return:

• Product name and description

• Serial number

• Failure symptoms

Packaging Guidelines for Equipment Return

Data communications equipment or parts that are to be returned to Tele-

netics for any reason must be properly packaged to prevent damage in

shipment and handling.

Service and Return Procedures

Service and Return Procedures-3

If the original packing material and shipping container are available,

reuse these items to return equipment. If these items are not available, it

is your responsibility to package the contents in a manner that protects

the equipment from damage during normal shipping and handling.

Responsibility for damage to equipment during transit must be resolved

between you and the carrier. The Logistics Administration group can

provide you with specific packaging instructions upon request.

Telenetics NT1D User manual

Brand: Telenetics

Model: NT1D

Type: User manual

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Telenetics NT1D User manual

Telenetics NT1D User manual

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