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ADTRAN NIU3 Installation And Maintenance Manual
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ADTRAN NIU3 Installation And Maintenance Manual

ADTRAN NIU3 Installation And Maintenance Manual

Ds3 network interface unit
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CONTENTS
1.
GENERAL .......................................................... 1
2.
INSTALLATION ............................................... 2
3.
TURNUP ............................................................ 4
4.
OPERATION...................................................... 4
5.
TESTING ............................................................ 5
6.
MAINTENANCE ............................................... 5
7.
SPECIFICATIONS ............................................ 5
8.
1.
NIU3 .................................................................. 1
2.
DS3 NIU Loopback Diagram ............................. 2
3.
Standalone Power Connection............................ 3
4.
5.
Shelf Power Connection ..................................... 3
1.
LED Indication ................................................... 4
2.
NIU3 Specifications ........................................... 6

1. GENERAL

This I&M Practice is used in association with the
Standalone Housing, 12-Slot Shelf, or 3-Slot Shelf.
Refer to Specifications for part numbers.
The ADTRAN DS3 Network Interface Unit (NIU3)
resides at the customer location as a demarcation and
loopback point for DS3 circuits. When used in a DS3
circuit, the unit provides a troubleshooting advantage
by supplying information that will eliminate a
customer premises dispatch. The unit performs a
loopback at the customer interface toward the network
when initiated either remotely from the CO, or locally
from the unit's front panel pushbutton. The NIU3 is
transparent to data transmission during normal
operation. Figure 1 shows the NIU3, P/N
1212075L1.
Revision History
This document has been reissued to incorporate
administrative revisions.
61212075L1-5C
DS3 Network Interface Unit
NIU3
Installation and Maintenance
Trademarks: Any brand names and product names included in this document are
Section 61212075L1-5, Issue 3
trademarks, registered trademarks, or trade names of their respective holders.
CLEI Code NCD3EEDA_ _
NIU3
1212075
Figure 1. NIU3
Features
The NIU3 provides the following features and
functions:
• Standalone enclosure, 12-slot, or 3-slot shelf
installation.
• DS3 C-bit and M13 framing or unframed.
• Bypass relays on the host circuit board ensure
virtually uninterrupted data transmission during
card failure, removal, or power loss.
• Loopback in response to FEAC codes.
• Recessed front panel pushbutton loopback
control.
• Nonintrusive front panel monitor jacks for both
network and customer directions.
• Notification on loss of signal detection.
• 120-minute loopback time out.
• -48 VDC power for standalone or shelf
enclosures.
• 120 VAC adapter option for standalone.
• Dual power feeds in shelf configuration.
Section 61212075L1-5C
Issue 3, October 2001
PWR
NTWK
CUST
LBK
LBK
SEL
NTWK MON
CUST MON
1

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Summary of Contents for ADTRAN NIU3

  • Page 1: Table Of Contents

    CO, or locally • Recessed front panel pushbutton loopback from the unit’s front panel pushbutton. The NIU3 is control. transparent to data transmission during normal • Nonintrusive front panel monitor jacks for both operation.

  • Page 2: Installation

    LED on the NIU3 provides notification of failure. See for each NIU3: two (IN/OUT) for customer receive/ Figure 2 for a circuit diagram of the NIU3 in a DS3 transmit, and two (IN/OUT) for network receive/ network delivered via SONET.

  • Page 3: Standalone Power Connection

    DIP switch option selection must be made Figure 4. AC/DC Transformer Power prior to inserting the NIU3 into the host circuit board. Connection If network equipment (e.g. ADM) is within 225 line feet of the NIU3, enable LBO on SW2-1.

  • Page 4: Turnup

    This process decreases Loss of Signal the chance of an inadvertent loopback. In the event of a loss of signal, the NIU3 provides both a “keep alive” signal and LED notification. • If a loopback is in affect, depressing SW1 will disable the loopback regardless of initiation •...

  • Page 5: Testing

    Pricing/Availability NIU FEAC loop up code (C-bit parity framing only) (800) 827-0807 toward the NIU3. The NIU3 then performs a network loopback. The loopback is terminated by a DS3 NIU ADTRAN Technical Support FEAC loop down code. The loopback command can...

  • Page 6: Niu3 Specifications

    Table 2. NIU3 Specifications i t a ° 0 ° 0 ° 0 ° 8 ° 0 ° 5 ° 0 ° 5 . n i . n i . n i : f l s t l i t a –...