Adtran T1 ESF CSU ACE User Manual

61203025L1-1C
May 2001

T1 ESF CSU ACE

User Manual

Part Number 1203025L1

Trademark Information:

T-WATCH is a trademark of ADTRAN.
OpenView isa registered trademark of Hewlett Packard Company.
SunNet Manager is a trademark of Sun Micro Systems, Inc.

901 Explorer Boulevard

P.O. Box 140000

Huntsville, AL 35814-4000

[phone]

© 2001 ADTRAN, Inc.

All Rights Reserved.

Printed in U.S.A.

The following conventions are used in this manual.

Notes provide additional useful information.

Cautions signify information that could prevent service interruption.

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

Important 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 near a bathtub, wash bowl, kitchen
sink, laundry tub, in a wet basement, or near a swimming pool.

2. Avoid using a telephone (other than a cordless-type) during an electrical storm.
There isa 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 onlythe 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

iii

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 vo ice band analog signal and transmitted
on the network.

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

• End use/customer will be responsible to file an affidavit with the local exchange
carrier when connecting unprotected CPE to a 1.544 Mbps or subrate digital ser­vice.

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

iv

Affidavit for Connection of Customer Premises Equipment to 1.544 MBPS and/

or Subrate Digital Services

For the work to be performed in the certified territory of ______________ (telco name)

State of ________________________________

County of ______________________________

I, _______________________ (name), ____________________ (business address),
_____________________ (telephone number) being duly sworn, state:

I have the 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 specification.With
respect to encoded analog content and billing protection:

( ) I attest that all operations associated with the establishment, maintenance and adjust­ment of the digital CPE with respect to encoded analog content and 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 con­tent or 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
equipmentused 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

v

( ) D. In lieu of the proceeding training requirements, the operator(s)/maintainer(S) is
(are) under the control of asupervisor trained in accordance with _______________
(circle one) above.

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

_____________________ Signature

_____________________ Title

_____________________ Date

Subscribed and sworn to before me

This _________ day of ___________________, 20__

_______________________________________
Notary Public

My commission expires: _________________________

vi

FCC regulations r equire that the following information be provided in this man­ual:

1. This equipment complies with Part 68 of the FCC rules. On the bottom of the

equipment housing is a label that shows the FCC registration number and Ringer
Equivalence Number (REN) for this equipment, if applicable. If required, this
information must be given to the telephone company.

2. The following information may be required when applying to the local telephone

company for leased line facilities.

Service Type REN/SOC FIC USOC

1.544 Mbps - SF 6.0F 04DU9-BN RJ48C

1.544 Mbps - SF and B8ZS 6.0F 04DU9-DN RJ48C

1.544 Mbps - ESF 6.0F 04DU9-1KN RJ48C

1.544 Mbps - ESF and B8ZS 6.0F 04DU9-1SN RJ48C

3. An FCC compliant telephone cord with a modular plug may be 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 FCC Part 68
compliant. See installation instructions for details.

4. If this equipment causes harm to the telephone network, the telephone company

may temporarily discontinue service. If possible, advance notification is given;
otherwise, notification is given as soon as possible. The telephone company will
advise the customer of the right to file a complaint with the FCC.

5. The telephone company may make changes in its facilities, equipment, operations,

or procedures that could affect the proper operation of this equipment. If t his hap­pens, the telephone company will provide advance notification and the opportunity
to make the necessary modifications to maintain uninterrupted service.

6. If experiencing difficulty with this equipment, please contact ADTRAN for repair and

warranty information. If the equipment is causing harm to the network, the tele­phone company may request this equipment to be disconnected from the network
until the problem is resolved or it is certain that the equipment is not malfunctioning.

7. This unit contains no user-serviceable parts.

8. The FCC recommends that the AC outlet to which equipment requiring AC

power is to be installed is provided with an AC surge arrester.

vii

Federal Communications Commission Radio Frequency Interference 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 causeharmful interferenceto 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 must be 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.

Canadian Emissions Requirements

This digital apparatus does not exceed the Class A limits for radio noise emissions
from digital apparatus as set out in the interference-causing equipment standard enti­tled “Digital Apparatus," ICES-003 of the Department of Communications.

Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux
appareils numeriques de Class A prescrites dans la norme sur le materiel brouilleur:
"Appareils Numeriques," NMB-003 edictee par le ministre des Communications.

viii

Canadian Equipment Limitations

Notice: The Canadian Industry and Science Canada label identifies certified equip­ment. This certification means that the equipment meets certain telecommunications
network protective, operational, and safety requirements. The Department 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 methods 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 limitations 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 ensurefor their own protection that the electrical groundconnectionsof
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.

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

TheLoadNumber(LN)assignedtoeachterminaldevicedenotesthepercentageof
the total load to be connected to a telephone loop which is u sed by the device, to pre­vent overloading. The termination on a loop may consist of any combination of
devices subject only to the requirement that the total of the Load Numbers of all
devices does not exceed 100.

ix

Limited Product Warranty

ADTRAN warrants that for five (5) 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 only applies if Customer
gives ADTRAN written notice of defects during the warranty period. Upon such
notice, ADTRAN will, at its option, either repair or replace the defective item. If ADT­RAN is unable, in a reasonable time, to repair or replace any equipment to 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.

EXCEPT FOR THE LIMITEDW ARRANTY 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 OF IMPLIEDWAR­RANTIES, SO THIS EXCLUSION MAY NOT APPLYTO CUSTOMER.

In no event will ADTRAN or its suppliers be liable to Customer for any incidental,
special, punitive, exemplary or consequential damages experienced by either Cus­tomer or a third party (including, but not 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.

x

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, or if it fails while in ser­vice.

A return material authorization (RMA) is required prior to returning equipment to
ADTRAN.Forservice,RMArequests,training,ormoreinformation,seethetoll-free
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]

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.

Technical Support (888) 4ADTRAN

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.

ACES Help Desk [phone]

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:

CAPS Department [phone]

xi

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

ADTRAN Customer and Product Service
901 Explorer Blvd.
Huntsville, Alabama 35806

RMA # _____________

Training

The Enterprise Network (EN) Technical Training Department offers training on our
most popular products. These courses include overviews on product features and func­tions while covering applicationsof ADTRAN's product lines. ADT RANprovidesa 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 Manager or the Enterprise Training Coordinator.

Training - phone [phone], ext. 7500
Training - fax [phone]
Training - email [e-mail]

xii

Table of Contents

List of Figures ..................................................................................................................xvii

List of Tables ......................................................................................................................xix

Chapter 1. Introduction

T1/FT1 Overview ................................................................................................................ 1-1

T1 Service Offerings...................................................................................................... 1-1

T1 ESF CSU ACE Overview .............................................................................................. 1-2

Features ..........................................................................................................................1-5

Interface Features ..................................................................................................1-6

NI (Labeled NET) .......................................................................................... 1-6

T1 (Labeled CPE) ...........................................................................................1-6

Control Port Input (Labeled EIA-232) ........................................................ 1-6

Four Methods of Control ....................................................................................................1-7

Front Panel..................................................................................................................... 1-7

ADTRAN PC Program.................................................................................................1-7

SNMP.............................................................................................................................. 1-7

ASCII Terminal.............................................................................................................. 1-8

T1 ESF CSU ACE Testing ................................................................................................... 1-8

Self Test........................................................................................................................... 1-8

Loopback Tests..............................................................................................................1-9

Network Loopbacks .............................................................................................1-9

DTE Interface Loopbacks ...................................................................................1-10

Pattern Generation...................................................................................................... 1-10

All Ones ................................................................................................................1-10

All Zeroes .............................................................................................................1-10

1 in 8 (1:8) ............................................................................................................. 1-10

Applications .......................................................................................................................1-11

61203025L1-1 T1 ESF CSU ACE User Manual xiii

Table of Contents

Chapter 2 . Installation

Unpack and Inspect .............................................................................................................2-1

Shipped by ADTRAN...................................................................................................2-1

Provided by Customer .................................................................................................2-1

Power Connection ............................................................................................................... 2-2

Wiring ...................................................................................................................................2-3

RJ-48C Connectors ........................................................................................................2-3

EIA-232 Connector ........................................................................................................ 2-4

Power-Up Testing and Initialization ................................................................................2-4

Self Test...........................................................................................................................2-4

Chapter 3. Operation

Front Panel Operation ........................................................................................................3-2

General Menu Operation ...................................................................................................3-3

Description of Menu Tools ..........................................................................................3-3

Data Field ...............................................................................................................3-3

Display Field ..........................................................................................................3-3

Arrows ....................................................................................................................3-3

Example Menu Operation............................................................................................3-3

Selecting a Main Menu Item ................................................................................3-3

Selecting a Submenu Item ....................................................................................3-4

Setting/Cancelling the Data Field..............................................................................3-5

View Display Only Data Fields...................................................................................3-6

Exiting or Returning to Previous Menus...................................................................3-6

Menu Structure .................................................................................................................... 3-6

The Four Opening Menu Functions ...........................................................................3-8

STATUS ..................................................................................................................3-8

NI PERF RPTS ................................................................................................3-9

NI ERR/ALM ................................................................................................. 3 -9

NI HISTORY ...................................................................................................3-9

T1 ERR/ALM .................................................................................................3-9

T1 HISTORY ...................................................................................................3-9

CONFIG ..................................................................................................................3-9

NETWORK (NI) ............................................................................................. 3-9

UNIT ................................................................................................................3-9

TERMINAL (T1) .............................................................................................3-9

UTIL ........................................................................................................................3-9

TIME/DATE ...................................................................................................3-9

SOFTWARE REV .........................................................................................3-10

REINIT UNIT ...............................................................................................3-10

ADDRESS ......................................................................................................3-10

xiv T1 ESF C SU ACE User Manual 61203025L1-1

Table of Contents

SET PASSCODE ........................................................................................... 3-10

FACT RESTORE ...........................................................................................3-10

REMOTE T-WATCH ...................................................................................3-10

TEST ......................................................................................................................3-10

LOCAL LOOPBACK ...................................................................................3-10

REM LB .........................................................................................................3-10

TEST PATTERN ...........................................................................................3-10

RUN SELFTEST ........................................................................................... 3-11

Detailed Menu Operation ................................................................................................3-11

1)STATUS ............................................................................................................. 3-11

1)NI PERF RPTS, Submenu of 1)STATUS ................................................ 3-12

2)NI ERR/ALM, Submenu of 1)STATUS ................................................3-13

3)NI HISTORY, Submenu of 1)STATUS ..................................................3-14

4)T1 ERR/ALM, Submenu of 1)STATUS ................................................. 3-14

5)TI HISTORY, Submenu of 1)STATUS ................................................... 3-14

2)CONFIG ............................................................................................................ 3-15

1)NETWORK (NI), Submenu of 2)CONFIG ............................................ 3-15

2)UNIT, Submenu of 2)CONFIG ...............................................................3-18

3)TERMINAL (TI), Submenu of 2)CONFIG ............................................ 3-20

3)UTIL ................................................................................................................... 3-21

1)TIME/DATE, Submenu of 3)UTIL ........................................................3-22

2)SOFTWARE REV, Submenu of 3)UTIL ................................................ 3-22

3)REINIT UNIT, Submenu of 3)UTIL .......................................................3-22

4)ADDRESS, Submenu of 3)UTIL .............................................................3-23

5)SET PASSCODE, Submenu of 3)UTIL ..................................................3-23

6)FACT RESTORE, Subm enu of 3)UTIL ..................................................3-23

7)REMOTE T-WATCH, Submenu of 3)UTIL ..........................................3-23

4)TEST ..................................................................................................................3-24

1)LOCAL LOOPBK, Submenu of 4)TEST ................................................ 3-25

2)REM LB, Submenu of 4)TEST ................................................................. 3-25

3)TEST PATTERN, Submenu of 4)TEST ..................................................3-26

4)RUN SELFTEST, Submenu of 4)TEST ...................................................3-26

Appendix A. Pinouts ....................................................................................................... A-1

Appendix B. Specification Summary............................................................................ B-1

Appendix C. Acronyms/Abbreviations........................................................................ C-1

Appendix D. Glossary..................................................................................................... D-1

Index ...........................................................................................................................Index-1

61203025L1-1 T1 ESF CSU ACE User Manual xv

Table of Contents

xvi T1 ESF CSU ACE User Manual 61203025L1-1

List of Figures

Figure 1-1. T1 ESF CSU ACE Application ......................................................................1-2

Figure 1-2. T1 ESF CSU ACE Front View........................................................................1-4

Figure 1-3. Jack Signal Directions.....................................................................................1-5

Figure 1-4. Network Loopback Tests ............................................................................... 1-9

Figure 1-5. DTE Interface Loopback..............................................................................1-10

Figure 1-6. General Data Application.............................................................................1-11

Figure 1-7. General Voice Application...........................................................................1-12

Figure 1-8. Channel Bank Application .......................................................................... 1-12

Figure 2-1. Power Connection .......................................................................................... 2-2

Figure 3-1. T1 ESF CSU ACE Front Panel Layout ......................................................... 3-2

Figure 3-2. Selecting a Menu Item from the Main Menu..............................................3-3

Figure 3-3. Menu with Additional Item(s) Not Shown................................................. 3-4

Figure 3-4. Submenu Indicating Additional Items Not Shown................................... 3-4

Figure 3-5. Editing a Data Field........................................................................................3-5

Figure 3-6. The Four Opening Menus .............................................................................3-6

Figure 3-7. T1 ESF CSU ACE Menu Tree......................................................................... 3-7

Figure 3-8. Four Opening Menus and First Level Submenus......................................3-8

Figure 3-9. Status Menu Tree ...........................................................................................3-11

Figure 3-10. First Menu of NI PERF RPTS Menu........................................................... 3-12

Figure 3-11. Performance Co unter Screen ...................................................................... 3-12

Figure 3-12. First Current NI Errors/Alarms Screen.....................................................3-13

Figure 3-13. Clear History Screen.....................................................................................3-14

Figure 3-14. Configuration Menu Tree ............................................................................ 3-15

Figure 3-15. Network (NI) Submenu...............................................................................3-16

Figure 3-16. First 2)UNIT Submenu Screen....................................................................3-18

Figure 3-17. Utility Menu Tree..........................................................................................3-21

61203025L1-1 T1 ESF CSU ACE User Manual xvii

List of Figures

Figure 3-18. Time/Data Screen.........................................................................................3-22

Figure 3-19. Re-initialize Unit/Address Screen .............................................................3-23

Figure 3-20. Test Menu Tree...............................................................................................3-24

Figure 3-21. Local Loopback Test Screen.........................................................................3-25

Figure 3-22. Self Test Result Screen..................................................................................3-27

Figure A-1. Power Connection Wiring ............................................................................A-1

xviii T1 ESF CSU ACE User Manual 61203025L1-1

List of Tables

Table A-1. RJ-48C Connector Pin Assignments............................................................ A-2

Table A-2. EIA-232 Connector Pin Assignments ......................................................... A-2

61203025L1-1 T1 ESF C SU ACE User Manual xix

List of Tables

xx T1 ESF CSU ACE User Manual 61203025L1-1

Chapter 1

Introduction

T1/FT1 OVERVIEW

T1 digital communication links have been used by telcos for the
transmission of voicesince the early sixties.The D4 channel bank is
an example of a T1 digital carrier system that was introduced in the
mid-seventies and is still widely used by the telcos.
Communication demands of business continued to grow to the
point that the telcos began offering T1 service directly to the public.
D4 channel banks were used for T1 in corporate network
topographies for voice. The technological advances in computer
development also created a demand for T1 data communication
which now is a large part of the T1 traffic.

T1 Service O fferings

T1 is a digital service that is delivered to the user over two pairs of
wires from the service provider. The signal operates at 1.544 Mbps
and is usually extended by repeaters installed approximately every
mile after the first 6000 feet. The T1 signal is divided into 24 time
slots which operate at 64 kbps (DS0s). Each time slot is occupied by
digitized voice or by data.

The T1 signal originally used a type of framing known as D4
superframe (SF), which identifies how the T1 is multiplexed. An
enhancement of that framing format, called exten ded superframe
(ESF), is available. ESF provides a non-disruptive means of full­time monitoring on the digital facility. It was originally used by
service providers to monitor the performanceof their service

61203025L1-1 T1 ESF CSU ACE User Manual 1-1

Chapter 1. Introduction

offering. Since the introduction of ESF, equipment installed in
private networks can also provide this performance information to
the user.

T1 ESF CSU ACE OVERVIEW

Most carriers (regional or local telcos), when supplying a T1 line to
customer premises equipm ent (CPE), require an interface to
monitor the T1 line. The T1 ESF CSU ACE (extended superframe
channel service unit advanced communication equipment)
provides the required interface between the CPE (such as DSUs,
channel banks, T1 multiplexers, and PBXs) and telco or private T1
facilities. See Figure 1-1.

Figure 1-1. T1 ESF CSU ACE Application

1-2 T1 ESF CSU ACE User Manual 61203025L1-1

Chapter 1. Introduction

The T1 ESF CSU ACE provides surge protection, signal
regeneration, alarms, and loopbacks necessary for circuit operation
and fault isolation. The unit provides the simultaneous use of
performance report messages of ANSI T1.403 and maintenance
messages of AT&T TR54016. The T1 ESF CSU ACE also provides
conversion from SF to ESF framing formats, allowing older SF data
terminal equipment (DTE) to take advantage of superior diagnostic
capabilities of ESF T1 facilities.

The unit complies with Part 68 of FCC Rules and with applicable
sections of AT&T 62411, ANSI T1.102, and T1.403.

61203025L1-1 T1 ESF CSU ACE User Manual 1-3

Chapter 1. Introduction

Figure 1-2 shows the T1 ESF CSU ACE, and Figure 1-3 shows the
jack signal directions.

Figure 1-2. T1 ESF CSU ACE Front View

1-4 T1 ESF CSU ACE User Manual 61203025L1-1

Features

Chapter 1. Introduction

Figure 1-3. Jack Signal Directions

The fol low ing features give the T1 ESF CSU ACE many advantages
over other products of its kind:

• Smallest T1 ESF CSU ACE in the industry.

• Front panel interface eliminates the need for a terminal to
configure the T1 ESF CSU ACE.

• Automatic ESF to D4 frame conversion

• Wall mount -48 VDC power supply e liminates the need for an
external power supply.

• Power cable enables customers to use their own -48 VDC
supply.

• Can be wall mounted to virtually any surface. There are rubber
feetontheunitforuseonatabletop.

• Can configure a modem so that it does not have to be
configured before installation.

• Backs up configuration data in NVRAM and EEPROM so that
the configuration data is nonvolatile longer than the life of the
lithium battery in the NVRAM. The NVRAM holds
performance monitoring data as well.

• Automatic network interface line build out (LBO) eliminates
confusion over transmit LBO setting (dependent on distance
from last repeater to customer premises).

61203025L1-1 T1 ESF CSU ACE User Manual 1-5

Chapter 1. Introduction

Interface Features

NI (Labeled NET)

The network interface (NI) port complies with the applicable ANSI
and AT&T standards. Its features include the following:

•D4orESFframing

•AMIorB8ZScoding

• Automatic or manual LBO

• Network performance monitoring and reporting

• Local and remote test loopbacks

•Extensiveselftest

T1 (Labeled CPE)

Features of the terminal interface (TI) include the following:

• D4 or ESF framing (independent of NI)

•AMIorB8ZScoding

• Transmit LBO to 655feet

•DTEloopback

Control Port Input (Labeled EIA-232)

Features of the control port include the following:

• EIA-232 input from a PC or a modem for control of the T1 ESF
CSU ACE

•Upto9600baudoperation

• ActsasinputforPCorproxyagentcontrol

• VT-100 terminal interface

1-6 T1 ESF CSU ACE User Manual 61203025L1-1