ADTRAN NIU3 Mode d’emploi

61212078L2-5A Section 61212078L2-5, Issue 1 1

DS3 Network Interface Unit

NIU3 12-Slot Shelf

Installation and Maintenance Practice

Section 61212078L2-5A

Issue 1, May 2003

CLEI Code NCM58Z0D_ _

CONTENTS

1. General................................................................ 1

2. Installation .......................................................... 2

3. Turn-Up .............................................................. 4

4. Operation ............................................................ 4

5. Maintenance ....................................................... 4

6. Specifications ..................................................... 4

7. Warranty and Customer Service......................... 5

FIGURES

Figure 1. NIU3 12-Slot Shelf .................................. 1

Figure 2. NIU3 Circuit Diagram ............................. 2

Figure 3. NIU3 12-Slot Shelf Rear Panel ................ 3

Figure 4. Local DC Power Connection ................... 3

TABLES

Table 1. Configuration Codes ................................ 4

Table 2. Shelf Specifications ................................. 5

Figure 1. NIU3 12-Slot Shelf

Trademarks: Any brand names and product names included in this document are

trademarks, registered trademarks, or trade names of their respective holders.

1. GENERAL

This practice is used in association with the NIU3

circuit card practice, P/N 61212075Lx 5.

The NIU3 12 Slot Shelf installs in a standard 19 inch

bay (23 inch mounting flanges also included) at a

designated location convenient to the customer.

Revision History

This is the first issue of this document. Future changes

to this document will be summarized in this

paragraph.

Features

The NIU3 12 Slot Shelf provides the following

features and functions:

• Pass through relays ensure virtually uninterrupted

transmission during card replacement, failure, or

power loss.

• Sturdy metal construction.

• Durable powder coated enamel finish.

• BNC transmit/receive jacks for each NIU3 card.

• Transparent front panel access cover with lock.

• Shelf alarm relay terminals provide alarm

indication.

• Dual –48 VDC power feeds.

• Load share diode arrangement for redundant

power capability.

• Cable management bars.

• Mounting and accessory hardware included.

123456789101112

NIU3

1212078

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STATUS

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STATUS

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STATUS

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STATUS

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STAT US

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STATUS

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STAT US

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STAT US

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STATUS

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STATUS

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STAT US

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

NTWK MON

NIU3

1212075

CUST MON

LBK SEL:

NTWK = ONCE & HOLD

CUST = TWICE & HOLD

STAT US

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

LOS = RED

AIS = AMBER

C-BIT

M13

LBK

2 Section 61212078L2-5, Issue 1 61212078L2-5A

Description

The NIU3 12 Slot Shelf is an all metal construction

housing that has slots for 12 NIU3 circuit cards. Card

guides direct the card to the backplane edge connector

and when properly inserted, thumbscrews on the NIU3

front panel align and fasten to threaded holes recessed

on the shelf interior. A removable transparent front

panel with locking hasp provides security. The

backplane circuitry is protected by a metal cover that

has openings for BNC data jacks, power terminal

connections, and alarm pins. Removable covers

provide security for power and alarm connections.

Two cable management bars and wire tie down

anchor points complete the assembly. All connections

are clearly labeled.

2. INSTALLATION

After unpacking the unit inspect it for damage. If

damage is noted, file a claim with the carrier, then

contact ADTRAN. See Warranty and Customer

Service.

Install per requirements of NEC NFPA 70. After

installation, ensure equipment rack stability is not

upset.

Location

The NIU3 12 Slot Shelf installs at any location

convenient to the customer as a demarcation and

loopback point for DS3 circuits.

The NIU3 can pass both network and customer signals

up to 900 feet. However, if either distance exceeds

450 feet, the respective front panel monitoring signal

begins to degrade. Also, during NIU3 bypass

operations, if total transmission distance exceeds 900

feet, signal quality may degrade. See Figure 2 for

maximum recommended transmission distances.

The NIU3 shelf mounts in a standard 19 inch or

23 inch bay. Reversible mounting flanges adjust to

desired position in the appropriate bay.

• Determine desired shelf extension from the bay

frame.

• Position the mounting flanges as necessary using

the appropriate flanges for 19 inch or 23 inch

bay. Install using supplied counter sink screws.

• Install cable management bars to the rear cover

of the shelf using supplied pan head screws.

• Mount the shelf to the bay accordingly.

Wiring

Wiring consists of three elements: data, power, and

alarms. Use suitably sized copper conductors only.

Data

Externally, the shelf backplane has four BNC

connectors for each of the twelve NIU3 slots: two

upper (IN/OUT) for network receive/transmit, and two

lower (IN/OUT) for customer receive/transmit (see

Figure 3). Cable management bars provide for

tie wrapping cables.

• Connect the cables to the BNCs on the backplane

for those shelf slots that will be populated.

• If not already accomplished, connect the opposite

ends to their designated terminations.

• Dress and lace the wire runs to the cable

management bars and bay frames as necessary.

C A U T I O N

SUBJECT TO ELECTROSTATIC DAMAGE

OR DECREASE IN RELIABILITY.

HANDLING PRECAUTIONS REQUIRED.

Figure 2. NIU3 Circuit Diagram

Central Office

Portable

Test

Set

DACS

Test

Head

DSX-3

XCONN

Panel ADM

Customer Premises

CPE

DS3

NIU

Loopback

Button

ADM

SONET

Ring

900

61212078L2-5A Section 61212078L2-5, Issue 1 3

Power

Fully populated, the NIU3 shelf operates on local –48

VDC @ 1.5 amps maximum. The shelf backplane has

spade lug terminal connections (TB1) for both an

“A side” and “B side” independent DC source, plus

Frame Ground (see Figure 4). A diode arrangement

adds reliability by allowing both DC supplies to

load share with one side picking up the entire load

should the other side fail. See requirements in

Compliance subsection.

WARNING

Ensure power is off before making power

wiring connections.

• Connect the –48 VDC supply and return wires

to the A side terminals per Figure 4.

• If redundant power is intended, connect

an independent power source to the B side

terminals per Figure 4.

CAUTION

Terminate grounds to an approved ground

location. Check metal to metal contact on all

ground connections, ensure ground circuit

continuity.

• Connect the common frame ground terminal

to an approved ground location.

CAUTION

Per GR 1089 CORE, October 2002, Section 9,

this system is designed and intended for

installation in a DC C (common) bonding and

grounding system only. It is not intended or

designed for installation in a DC I (isolated)

bonding and grounding system.

Figure 3. NIU3 12-Slot Shelf Rear Panel

Figure 4. Local DC Power Connection

COM NC NO

DC POWER

48V , 1.5A

USE COPPER CONDUCTORS ONLY

THIS UNIT MAY BE POWERED BY MULTIPLE SOURCES.

DISCONNECT ALL SOURCES PRIOR TO SERVIGING.

Ð48 V

RET B Ð48 V

RET A Ð48 V

NOTE: Power and Alarm security covers removed for clarity.

-48V A

A RETURN

A SUPPLY

B SUPPLY

B RETURN

FRAME

GROUND

TB1

-48V RET A

-48V B

-48V RET B

4 Section 61212078L2-5, Issue 1 61212078L2-5A

Code Input Output

Power Code (PC) F C

Telecommunication Code (TC) – –

Installation Code (IC) E –

Table 1. UL 1950 Configuration Codes

Alarms

A 3 post wire wrap terminal (P1) on the shelf

backplane selects either a normally closed (COM/NC)

or a normally open (COM/NO) alarm relay. The alarm

relay output responds to the card malfunction status

on individual NIU3 cards.

• Determine if the desired alarm output is a NO or

a NC response.

• Make wire wrap connections accordingly.

• If not already accomplished, connect alarm

output to designated terminations.

After wiring connections are made, replace power and

alarm security covers.

Options

Aside from connecting redundant power, and alarm

NO/NC selection, there are no options associated with

the shelf.

3. TURN-UP

When an NIU3 is inserted into a shelf with power on

the backplane, the PWR or STATUS LED turns ON

red while the NIU3 performs a self test. If the test

passes, the PWR or STATUS LED turns ON green

indicating the NIU3 is online and the other LEDs go

through an ON/OFF sequence. If the test fails, the

LED remains red and the bypass relays will maintain

data flow around the NIU3.

4. OPERATION

The NIU3 12 Slot Shelf exchanges data to and from

the network loop and customer loop via the BNC

connectors. If the NIU3 fails or is removed from the

circuit, the affected card relays on the backplane

provide pass through transmission so data flow is

maintained.

During normal operation the NIU3 is transparent to

the network. In the event of circuit trouble, test

equipment at the central office can monitor the loop.

When a loopback is initiated, the transmit/receive

paths can be tested to the customer interface. NIU3

troubleshooting tests are intrusive to data

transmission.

LED Indication

There are no LEDs on the 12 slot shelf. However,

NIU3 LEDs provide information for NIU3 and shelf

configuration and status.

5. MAINTENANCE

The NIU3 12 Slot Shelf does not require maintenance

for normal operation.

6. SPECIFICATIONS

See Table 1 for configuration codes and Table 2 for

shelf specifications.

Compliance

Use one of the following requirements for powering

the unit locally:

1. Connect to a grounded –48 VDC source,

electrically isolated from the AC source. Provide

branch circuit overcurrent protection with a fuse

or circuit breaker, minimum 48 VDC, maximum

15 amps. Provide an easily accessed approved

and rated disconnect device in the field wiring.

2. Connect to an approved Class 2 Type (LPS)

power supply rated 48 VDC, maximum 240 VA.

Standards:

• NEBS: Level 3

• ANSI: T1.404

• UL: 1950

61212078L2-5A Section 61212078L2-5, Issue 1 5

7. WARRANTY AND CUSTOMER SERVICE

ADTRAN will replace or repair this product within

the warranty period if it does not meet its published

specifications or fails while in service. Warranty

information can be found at

www.adtran.com/warranty.

U.S. and Canada customers can also receive a copy of

the warranty via ADTRAN’s toll free faxback server

at 877 457 5007.

• Request Document 414 for the U.S. and Canada

Carrier Networks Equipment Warranty.

• Request Document 901 for the U.S. and Canada

Enterprise Networks Equipment Warranty.

Refer to the following subsections for sales, support,

CAPS requests, or further information.

Table 2. Shelf Specifications

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ADTRAN Sales

Pricing/Availability:

800-827-0807

ADTRAN Technical Support

Pre-Sales Applications/Post-Sales Technical Assistance:

800-726-8663

Standard hours: Monday Friday, 7 a.m. 7 p.m. CST

Emergency hours: 7 days/week, 24 hours/day

ADTRAN Repair/CAPS

Return for Repair/Upgrade:

(256) 963-8722

Repair and Return Address

Contact Customer and Product Service (CAPS) prior

to returning equipment to ADTRAN.

ADTRAN, Inc.

CAPS Department

901 Explorer Boulevard

Huntsville, Alabama 35806-2807

6 Section 61212078L2-5, Issue 1 61212078L2-5A

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