ADTRAN NIU3 Instruction Manual

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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
N
T
W
K
C
U
S
T
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
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
B
Ð48 V
RET B Ð48 V RET A Ð48 V A
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:
[phone]
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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