ADTRAN NIU3 Installation And Maintenance Practice

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. Standalone Housing w/NIU3 ................... 1
Figure 2. NIU3 Standalone Rear Panel ................... 2
Figure 3. NIU3 Circuit Arrangement ...................... 2
Figure 4. Local DC Power Connection ................... 3
Figure 5. AC/DC Transformer Power ..................... 3
TABLES
Table 1. Configuration Codes ................................ 4
Table 2. Standalone Specifications ........................ 5

1. GENERAL

This practice is used in association with the NIU3
practice, P/N 61212075Lx-5. Refer to Specifications
section for additional information.
The NIU3 standalone housing installs at the customer
premises at a designated location convenient to the
customer. The housing can be oriented in any
position allowing clearance to fully open the cover.
Revision History
This is the first issue of this document. Future
changes to this document will be summarized in this
paragraph.
Features
The standalone housing provides the following
features and functions:
• Pass through relays for signal reliability during
power loss or card removal.
• Sturdy metal construction.
• Durable powder-coated enamel finish.
• All threaded fasteners.
61212070L2-5A
DS3 Network Interface Unit
NIU3 Standalone Housing
Installation and Maintenance Practice
Section 61212070L2-5, Issue 1
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
CLEI Code Standalone Housing: NCM57WVD_ _
NIU3
1212075
PWR
NTWK
CUST
LBK
LBK
SEL
NTWK MON
CUST MON

Figure 1. Standalone Housing w/NIU3

• Card guides for easy card insertion.
• Transparent viewing panel.
• Hasp for locking the cover.
• Wire tie-down extrusion.
• Easy to read label identification.
• Portals for power and ground wires.
Description
The standalone housing is designed to mount to a
plywood backboard. The body has four mounting
screw holes on raised extrusions, which provide
clearance from the backboard. The housing interior
holds a host circuit board designed to accept the NIU3
circuit card. Card guides direct the NIU3 for correct
insertion and also secure the unit from vertical
movement. When properly inserted, the NIU3
thumbscrews on the front panel align and fasten to
threaded holes on the standalone body, providing a
secure assembly.
Section 61212070L2-5A
Issue 1, May 2003
1