The ADTRAN’s Total Access Network Interface Unit (T1 NIU)serves as an interface between a T1 metallic span and the CustomerPremises Equipment (CPE). Providing standard maintenance loop-back plus collection and reporting of DS1 performance statistics,the T1 NIU enables service providers to respond proactively to facil-ity performance degradation, thereby improving the availability ofHi-Cap T1 circuits. The NIU provides a front panel that is half thewidth of the standard 400 mechanics-style NIU and makes electri-cal connections to the facility and CPE sides of the circuit through a56-pin card-edge connector on the mounting assembly, usingindustry-standard pin assignments.

The T1 NIU is used to terminate T1 metallic span facilities fromeither a TA 3000 or TA 3010 multiservice access platform using theT1-OR in one of its slots. Each application mode has a unique set ofprovisionable options. The T1 NIU can be provisioned either fromthe T1 OR in the Total Access chassis or locally via a VT 100 terminalconnected to the RS-232 DB9 connector on the front of the unit.

The T1 NIU is situated at the customer's premises and functionsas a maintenance interface between the T1 metallic span and theCPE. In addition to conventional NIU functions such as loopback,the NIU collects performance data for both directions of the facility,stores the information, and reports it to the remote test centereither on demand or on a real-time basis. This performance infor-mation can also be locally accessed via the front-panel RS-232 craftinterface port.

Flexible DS1 performance reporting options include (1) local,non-intrusive access to PM parameters via a front-panel local craftinterface port, (2) remote, intrusive access during loopback to PMparameters via TL1 commands and responses in the ESF Data Link,(3) remote, non-intrusive access to PM parameters via TL1 com-mands and responses in the Data Link without affecting customerpayload, and (4) remote, non-intrusive real-time reporting of PMparameters via 1-second NPRM reports in the Data Link per ANSIT1.403-1997.

Other features include a selectable powering option for span orlocal power; front-panel test points for measuring span current;bridging-type bantam jacks on RCV and XMT ports for transmissionpath monitoring; a front-panel craft interface port (serial RS-232,VT-100) for local PM extraction, unit set-up and maintenance; andremote provisioning and query of all options. When used in con-junction with a pair of T1 ORs in a Total Access chassis, a pair of T1NIUs in the ADTRAN Loop Support System Housing (1245034L2)provides a protected circuit to the customer.

P R O D U C T F E A T U R E S

■ Full-featured T1 NIU loopback device,plus detailed DS1 performance monitoring and reporting at the cus-tomer facility interface

■ Loopback activation and deactivationusing inband (unframed or SF/ESFframed) or ESF Data Link codes

■ Alternate loopback control with 16-bitpattern for T1 Extension Repeater(TER) applications

■ Selectable feature sets for use in T1metallic span applications

■ Enhanced sectionalization capabili-ties via AIS-CI and RAI-CI alarm signals as defined by T1.231 (T1M1.3)and T1.403-1997

■ Derives and maintains DS1 performance statistics independentlyfor each direction of transmission

■ Supports both seven-day stored andreal-time performance reportingmodes

■ Flexible DS1 performance reportingoptions

■ Selectable SF (CPE) to ESF (Network)framing format conversion to facilitatereal-time performance reporting oncustomer SF circuits via the ESF DataLink

■ Integral real-time clock provides timestamping of all performance information

T1 NIU T O TA L A C C E S S T M T 1 N E T W O R K I N T E R F A C E U N I T

Product Specifications

MECHANICAL■ Dimensions: : 6.19" L, .71" W, 5.59" H■ Weight: Approximately 6 oz■ Mounting: : T200 mechanics

FACEPLATE FEATURES■ XMT and RCV Bridge jacks■ PWR LED■ TST LED■ RLOS LED■ TLOS LED■ ALM LED■ Manual Loopback switch■ TP1/TP2 voltage test points■ RS232 DB9 craft interface

ELECTRICAL Power requirements■ 42 to -56 VDC local■ Span powered

Regulatory Standards■ NEBS Level 3■ UL 1950

CORPORATE OFFICEADTRAN, Inc.

901 Explorer BoulevardP.O. Box 140000

Huntsville, AL 35814-4000

800 9ADTRAN256 963-8000

fax: 256 963-7916fax back: 256 963-8200

e-mail: info@adtran.comweb site: www.adtran.com

REGIONAL OFFICES

Dallas, TX800 471-8648

Denver, CO800 471-8651

Irvine, CA800 788-5408

Kansas City, KS800 471-8649

Philadelphia, PA800 471-8656

San Antonio, TX888 223-7671

INTERNATIONAL CONTACTS

Asia Pacific/Australia852-2824-8283 (Hong Kong)

Canada800 232-6811

Caribbean/Latin America954 746-5355

All other Internationalinquiries

256 963-2500

ADTRAN is an ISO 9001 registered company.

Printed in the U.S.A. on recycled paper.61181315L1-8A September 2000

©2000 ADTRAN, Inc. All rights reserved.

ENVIRONMENTAL■ Operating: –40° to +65°C■ Storage: –40° to +70°C■ Relative Humidity: Up to 95%,

non-condensing

Ordering Information

EQUIPMENT PART #T1 NIU………………………..............1181315L1T1-OR………………………...............1181310L1

Specifications subject to change without notice.

UNIT1181000L1

PWR

DSX

TXEQ

RX

TXMON

RX

TST

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DS3MXPOWER

STATUS

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1181020L1DS3MX

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1181015L1

HTU-C1181101L1

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HTU-C1181101L1

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HTU-C1181101L1

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HTU-C1181101L1

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HTU-C1181101L1

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1181300L1

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1181300L1

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1181300L1

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1181200L1HD-10 BRI Mux

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1181310L1HTU-C

1181101L1

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LP1

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GRN=NORMYEL=MAN

HD-10BRI MUXPWR

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1250110L1

65

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Express 3000

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LINETEST

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1

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1250110L1

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