ADTRAN 1200384L1 User Manual

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 1 of 20

ECHO CANCELLER

User Interface Guide (UIG)

1200384L1 Echo Canceller

January 2001

© 2001,ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 2 of 20

Trademarks

Any brand names and product names included in this manual are trademarks,
registered trademarks, or trade names of their respective holders.

To the Holder of the Manual

The contents of this manual are current as of the date of publication. ADTRAN
reserves the right to change the contents without prior notice.

In no event will ADTRAN be liable for any special, incidental, or consequential
damages or for commercial losses even if ADTRAN has been advised thereof as a
result of issue of this publication.

901 Explorer Boulevard

P.O. Box 140000

Huntsville, AL 35814-4000

[phone]

©2001 ADTRAN, Inc.

All Rights Reserved.

Printed in U.S.A.

TA 8 50 User Manual © 2001, ADTRAN, Inc.

61200375L1-1

Echo Canceller UIG/61200384L1-31A

Notes provide additional useful information.

Caution signify information that could prevent service interruption.

Warnings provide information that could prevent damage to the equipment or
endangerment to human life.

TA 850

Page 3 of 20

Safety Instructions

When using your telephone equipment, please follow these basic safety
precautions to reduce the risk of fire, electrical shock, or personal injury:

1. Do not use this product near water, such as a bathtub, wash bowl, kitchen sink,
laundry tub, in a wet basement, or near a swimming pool.

2. Avoid using atelephone (other than a cordless-type) during an electrical storm.
There is a remote risk of shock from lightning.

3. Do not use the telephone to report a gas leak in the vicinity of the leak.

4. Use only the power cord, power supply, and/or batteries indicated in the man­ual. Do not dispose of batteries in a fire. They may explode. Check with local
codes for special disposal instructions.

Save These Important Safety Instructions

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 4 of 20

TA 8 50 User Manual © 2001, ADTRAN, Inc.

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 5 of 20

FCC regulations require that the following information be provided in this manual
to the customer:

1. This equipment complies with Part 68 of the FCC rules. The required label is
affixed to the bottom of the chassis.

2. An FCC-compliant telephone cord and modular plug is provided with this
equipment. This equipment is designed to be connected to the telephone net­work or premises wiring using a compatible modular jack which is Part 68­compliant. See installation instructions for details.

3. If your telephone equipment (TA 850) causes harm to the telephone network,
the telephone company may discontinue your service temporarily. If possible,
they will notify you in advance. But if advance notice isn’t practical, you will
be notified as soon as possible. You will be advised of your right to file a com­plaint with the FCC.

4. Your telephone company may make changesin its facilities, equipment, opera­tions, orprocedures that could affect the properoperation of your equipment.If
they do, you will be given advance notice to give you an opportunity to main­tain uninterrupted service.

For a T1 Port:

1.544 Mbps - SF 6.0N 04DU9-BN RJ-48C

1.544 Mbps - SF and B8ZS 6.0N 04DU9-DN RJ-48C

1.544 Mbps - ESF 6.0N 04DU9-1KN RJ-48C

1.544 Mbps - ESF and B8ZS 6.0N 04DU9-1SN RJ-48C

5. If you experience trouble with this equipment (TA 850), please contact ADT­RAN for repair/warranty information. The telephone company may ask you to
disconnect this equipment from the network until the problem has been cor­rected or until you are sure the equipment is not malfunctioning.

6. This unit contains no user-serviceable parts.

7. The FCC recommends that the AC outlet to which equipment requiring AC
power is to be installed is provided with an AC surge arrester.

8. The following information may be required when applying to your local tele­phone company for leased line facilities.

Service Type REN/SOC FIC USOC

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 6 of 20

Federal Communications Commission (FCC) Statement

This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses,and can radiate radio frequency energy and,if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio frequencies.
Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense.

Shielded cables mustbe used with this unit to ensure compliance with Class A FCC limits.

Change or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.

TA 8 50 User Manual © 2001, ADTRAN, Inc.

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 7 of 20

Canadian Equipment Limitations

The Industry Canada Certification label identifies certified equipment. This
certification means that the equipment meets certain telecommunications
network protective, operational, and safety requirements. The Department of
Commerce 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 ofconnection. In some cases, thecompany's inside wiring associated witha
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.

Users should ensure for their own protection that the electrical ground connections of the power
utility, telephone lines and internal metallic waterpipe system, if present, are connected together.
This precaution may be particularly important in rural areas.

Users should not attempt to make such connections themselves, but should contact
the appropriate electric inspection authority, or an electrician, as appropriate.

The Load Number (LN) assigned to each terminal device denotes the percentage of the total load
to be connected to a telephone loop which is used by the device, to prevent overloading. The ter­mination on a loop may consist of any combination of devices subject only to the equipment that
the total of the LNs of all devices does not exceed 100.

The ringer equivalence number (REN) assigned to each terminal adapter is used to determine the
total number of devices that may be connected to each circuit. The sum of the RENs from all
devices in the circuit should not exceed a total of 5.0.

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 8 of 20

Affidavit Requirements for Connection to Digital Services

• An affidavit is required to be given to the telephone company whenever digital terminal
equipment without encoded analog content and billing protection is used to transmit digital
signals containing encoded analog content which are intended for eventual conversion into
voiceband analog signals and transmitted on the network.

• The affidavit shall affirm that either no encodedanalog content or billing informationis being
transmitted or that the output of the device meets Part 68 encoded analog content or billing
protection specifications.

• End user/customer will be responsible for filing an affidavit with the local exchange carrier
when connecting unprotected customer premise equipment (CPE) to 1.544 Mbps or subrate
digital services.

• Until such time as subrate digital terminal equipment is registered for voice applications, the
affidavit requirement for subrate services is waived.

TA 8 50 User Manual © 2001, ADTRAN, Inc.

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 9 of 20

Affidavit for Connection of Customer Premises Equipment

to 1.544 Mbps and/or Subrate Digital Services

For thework to be performedinthe certified territory of___________________(telco name)

State of ________________

County of ________________

I, _______________________ (name), _____________________________(business address),

____________________ (telephone number) being duly sworn, state:

I have responsibility for the operation and maintenance of the terminal equipment to be
connected to 1.544 Mbps and/or ________ subrate digital services. The terminal equipment
to be connected complies with Part 68 of the FCC rules except for the encoded analog
content and billing protection specifications. With respect to encoded analog content and
billing protection:

( ) I attest that all operations associated with the establishment, maintenance, and adjustment of

the digital CPEwith respect to analog content andencoded billing protection information con­tinuously complies with Part 68 of the FCC Rules and Regulations.

( ) The digital CPE does not transmit digital signals containing encoded analog contentor billing

information which is intended to be decoded within the telecommunications network.

( ) The encoded analog content and billing protection is factory set and is not under the control of

the customer.

I attest that the operator(s)/maintainer(s) of the digital CPE responsible for the establish­ment, maintenance, and adjustment of the encoded analog content and billing information
has (have) been trained to perform these functions by successfully having completed one of
the following (check appropriate blocks):

( ) A. A training course provided by the manufacturer/grantee of the equipment used to encode

analog signals; or

( ) B. A training course provided by the customer or authorized representative, using training

materials and instructions provided by the manufacturer/grantee of the equipment used to
encode analog signals; or

( ) C. An independent training course (e.g., trade school or technical institution) recognized by

the manufacturer/grantee of the equipment used to encode analog signals; or

( ) D. In lieu of the preceding training requirements, the operator(s)/maintainer(s) is (are) under

the control of a supervisor trained in accordance with _________ (circle one) above.

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 10 of 20

I agree to provide ______________________ (telco’s name) with proper documentation to
demonstrate compliance with the information as provided in the preceding paragraph, if so
requested.

_________________________________Signature

_________________________________Title

_________________________________ Date

Transcribed and sworn to before me

This ________ day of _______________, 2000

_________________________________
Notary Public

My commission expires:

_________________________________

TA 8 50 User Manual © 2001, ADTRAN, Inc.

Limited Product Warranty

ADTRAN warrants that for ten (10) years from the date of shipment to Customer,
all products manufactured by ADTRAN will be free from defects in materials and
workmanship. ADTRAN also warrants that products will conform to the
applicable specifications and drawings for such products, as contained in the
Product Manual or in ADTRAN's internal specifications and drawings for such
products (which may or may not be reflected in the Product Manual). This
warranty onlyapplies if Customer gives ADTRANwritten notice of defects during
the warranty period. Upon such notice, ADTRAN will, at its option, either repair
or replace the defective item. If ADTRANis unable, in a reasonable time, to repair
or replace any equipmentto a condition as warranted,Customer is entitled to a full
refund of the purchase price upon return of the equipment to ADTRAN. This
warranty applies only to the original purchaser and is not transferable without
ADTRAN's express written permission. This warranty becomes null and void if
Customer modifies or alters the equipment in any way, other than as specifically
authorized by ADTRAN.

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 11 of 20

EXCEPT FOR THE LIMITED WARRANTY DESCRIBED ABOVE, THE
FOREGOING CONSTITUTES THE SOLE AND EXCLUSIVE REMEDY OF
THE CUSTOMER AND THE EXCLUSIVE LIABILITY OF ADTRAN AND IS
IN LIEU OF ANY AND ALL OTHER WARRANTIES (EXPRESSED OR
IMPLIED). ADTRAN SPECIFICALLY DISCLAIMS ALL OTHER
WARRANTIES, INCLUDING (WITHOUT LIMITATION), ALL
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. SOME STATES DO NOT ALLOW THE
EXCLUSION OFIMPLIED WARRANTIES, SOTHIS EXCLUSION MAY NOT
APPLYTOCUSTOMER.

In no eventwill ADTRAN or its suppliers be liable toCustomer for any incidental,
special, punitive, exemplary or consequential damagesexperienced by either
Customer or a third party (including, butnot limited to, loss of data or information,
loss of profits, or loss of use). ADTRAN is not liable for damages for any cause
whatsoever (whether based in contract, tort, or otherwise) in excess of the amount
paid for the item. Some states do not allow the limitation or exclusion of liability
for incidental or consequential damages, so the above limitation or exclusion may
not apply to Customer.

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 12 of 20

TA 8 50 User Manual © 2001, ADTRAN, Inc.

Echo Canceller UIG/61200384L1-31A

Customer Service, Product Support Information, and Training

ADTRAN will replace or repair this product within five years from the date of
shipment if the product does not meet its published specification, orif it fails while
in service.

A return material authorization (RMA) is required prior to returning equipment to
ADTRAN. For service, RMA requests, training, or more information, see the toll­free contact numbers given below.

Presales Inquiries and Applications Support

Please contact your local distributor, ADTRAN Applications Engineering, or
ADTRAN Sales:

Applications Engineering [phone]

Sales [phone]

61200375L1-1

TA 850

Page 13 of 20

Post-Sale Support

Please contact your local distributor first. If your local distributor cannot help,
please contact ADTRAN Technical Support and have the unit serial number
available.

The Custom Extended Services (ACES) program offers multiple types and levels
of service plans which allow you to choose the kind of assistance you need. For
questions, call the ACES Help Desk.

Repair and Return

If ADTRAN Technical Support determines that a repair is needed, Technical
Support will coordinate with the Custom and Product Service (CAPS) department
to issue an RMA number. For information regarding equipment currently in house
or possible fees associated with repair, contact CAPS directly at the following
number:

Technical Support (888) 4ADTRAN

ACES Help Desk [phone]

CAPS Department [phone]

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 14 of 20

Identify the RMA number clearly on the package (below address), and return to
the following address:

ADTRAN Customer and Product Service
6767 Old Madison Pike
Building #6 Suite 690
Huntsville, Alabama 35807y
RMA # _____________

Training

The Enterprise Network (EN) Technical Training offers training on our most
popular products. These courses include overviews on product features and
functions while covering applications of ADTRAN's product lines. ADTRAN
provides a variety of training options, including customized training and courses
taught at our facilities or at your site. For more information about training, please
contact your Territory Manageror the Enterprise TrainingCoordinator by phone at
800-615-1176 ext. 7500, by fax at 256-963-7941, or by email at
[e-mail].

Training [phone], ext. 7500

TA 8 50 User Manual © 2001, ADTRAN, Inc.

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 15 of 20

ECHO CANCELLER USER INTERFACE GUIDE

This User Interface Guide isdesigned foruse by network administrators and others who will configure and provision
the system. It contains Echo Canceller overview information, module installation instructions, and menus.

CONTENTS

EchoCancellerOverview.........................................................17

Installing a Module . . . . . . . . ......................................................17

EchoCancellerMenus ...........................................................18

FIGURES

Figure1. ModulesMenu........................................................ 18

Figure2. Modules/ModulesMenu................................................. 19

Figure3. ProvisioningMenu..................................................... 19

Figure4. Provisioning/ADPCMMenu.............................................. 20

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 16 of 20

TA 8 50 User Manual © 2001, ADTRAN, Inc.

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 17 of 20

1. ECHO CANCELLER OVERVIEW

The Echo Canceller Module adds ATM functionality to the TA 850 and is used exclusively with the T1 RCU. Voice
over packet/cell applications require that Echo Cancellation techniques be applied to the voice traffic to achieve high
quality voice. The Echo Canceller is used in ATM voice applications that require G.168 echo cancellation. This mod­ule cancelsecho for up to 24voice ports.

The T1 RCU must be using Voice Over ATM firmware to be able to use this module. Firmware can be updated by
using XMODEM transfer protocol via the base unit’s
the T1 RCU VoATM User Interface Guide (document number 61200376L2-31A) for instructions on updating firm­ware.

The Echo Canceller (which installs in special slots A and B) is available with or without Adaptive Differential Pulse
Code Modulation (ADPCM). ADPCM is a speech coding algorithm which uses fewer bits than the traditional Pulse
Code Method (PCM), allowing you to get more calls into less space. The Echo Canceller with ADPCM performs
32 kbps ADPCM voice compression onup to 24 voice ports. ADPCM voice compression is per ITU-TG.721. An un­compressed 64 kbps PCM voice port requires roughly 77 kbps of WAN bandwidth (the bandwidth required above
64 kbps is overhead due to the ATM cell header). For a 1.536 Mbps T1 line, only 19 voice ports can be active simul­taneously, with practically no bandwidth left over for data. A 32 kbps G.721 compressed voice port requires roughly

38.5 kbps. For a 1.536 Mbps T1 line, 24 voice ports can be active simultaneously (the maximum allowed by the

TA 850). Evenwith24 compressed voiceportsactive, approximately 611 kbpsof bandwidth is stillavailable for data.

CRAFT

port or by using TFTP from a network server. Refer to

The EchoCanceller providesthe following functions:

• Performs echo cancellation per G.165 and G.168 for up to 24 voice ports

• Enables/disables echo cancellation o n a per-port basis

• Provides per port G.164 2100 Hz or G.165 2100 Hz phase reversal tone detection

• Performs voice compression per G.721 for up to 24 voice ports(Echo Canceller with ADPCM only)

• Enables/disables ADPCM on a per-port basis (Echo Canceller with ADPCM only)

2. INSTALLING A MODULE

After installing the TA 850 Base Unit and connecting the required cables, you can install necessary modules.

Remove the 20 Hz fuse before exposing backplane or accessing channel units.

Electronic modules can be damaged by s tatic electrical discharge. Before handling modules, wear
an antistatic discharge wrist strap to prevent damage to electronic components. Place modules in
antistatic packing material when transporting or storing. When working on modules, always place
them on an approved antistatic mat that is electrically grounded.

Individual access modules insert from the front. A locking bar holds the modules in place for added security. Disen­gaging the captured screw allows removal of the locking bar. All wiring connections terminate on the backplane.

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 18 of 20

The following step/action table tells how to install a module.

Instructions for Installing Module in the TA 850

Step Action

1
2
3

4
5

Hold the module by the faceplatewhile supporting thebottom side.
Align the module edgesto theguide groovesfor the designated slot.
Insert the module until the edge connector seats firmly into the

backplane.
Lock theunit in place by pushing in on the locking lever.
Connect the cables to the associated device(s).

3. ECHO CANCELLER MENUS

After booting up, go to the M

ODULES

menu (Figure 1).

Figure 1. M odules Menu

TA 8 50 User Manual © 2001, ADTRAN, Inc.

61200375L1-1

TA 850

Echo Canceller UIG/61200384L1-31A

Page 19 of 20

Press

M

ENU

Press

Enter

to access theM

column.

Enter

.TheP

ODULES/MODULES

ROVISIONING

menu (Figure 2).Arrow down to Slot 7 (EC/ADPCM) and over to the

Figure 2. Modules/Modules Menu

menu (Fi gure 3) appears.

Figure 3. Provisioning Menu

© 2001, ADTRAN, Inc. TA 850 User Manual

61200375L1-1
TA 850
Echo Canceller UIG/61200384L1-31A
Page 20 of 20

Arrow to E
and press

CHOCANCELLER

Enter

to access the P

and press

ROVISIONING

Enter

to view choices forthis menu(E

/ADPCM menu (Figure 4).

NABLE

or D

ISABLE

). Arrow to ADPCM

For the EchoCancellerModule without ADPCM (1200384L1), make sure all ADPCMchannelsare
disabled as shown in Figure 4.

Figure 4. Provisioning/ADPCM Menu

TA 8 50 User Manual © 2001, ADTRAN, Inc.