ii
COPYRIGHT
Copyright 2001 Telenetics Corporation.
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.
All rights reserved. No part of this publication may be reproduced, transcribed, stored in an
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.
iv
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.
v
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
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.
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