ADTRAN Total Access 374 Product manual

installation guide
Total Access 374
4-POTS, 4-GigE MDU ONT
Installation and Maintenance Guide
Document Number: 61287703G1-5B
CLEI: BVM9Z00B_ _
June 2014

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
ii 61287703G1-5B
Front Matter
Trademarks
Any brand names and product names included in this document are trademarks, registered
trademarks, or trade names of their respective holders.
To the Holder of this Document
The contents of this document are current as of the date of publication. ADTRAN®reserves
the right to change the contents without prior notice.
In no event will ADTRAN be liable for any special, incidental, or consequential damages or 
for commercial losses even if ADTRAN has been advised thereof as a result of issue of this
document.
About this Document
This document provides instructions for the installation and maintenance of the Total Access
374 4-POTS, 4-GigE MDU ONT. The intended audience for this information is the craftperson
responsible for the installation and maintenance of the equipment. These instructions assume
familiarity with the intended use of the equipment, basic required installation skills, and
knowledge of local and accepted safety practices.
Related information can be obtained by referring to the applicable Job Aid and Compliance
Notice documentation.
901 Explorer Boulevard
P.O. Box 140000
Huntsville, AL 35814-4000
United States
[phone]
©2015 ADTRAN, Inc.
All Rights Reserved.

Revision History
61287703G1-5B iii
Revision History
Revision Functional Description
This revision adds instructions for adding an ONT using Registration ID.
Hazard Classifications
The following hazard classifications are used in this document:
DANGER
!
DANGER indicates a hazard with a high level of risk which, if not avoided,
will result in death or serious injury.
WARNING
!
WARNING indicates a hazard with a medium level of risk which, if not
avoided, could result in death or serious injury.
CAUTION
!
CAUTION indicates a hazard with a low level of risk which, if not avoided,
could result in minor or moderate injury. CAUTION can also be used to alert
against unsafe practices associated with events that could lead to personal
injury.
NOTICE
Notice call-outs indicate a potentially hazardous situation not related to
personal injury, such as messages related to property damage only.
NOTE
Notes inform the user of additional, but essential, information or features.
Revision Date Description
A July 2013 Initial Release
B June 2015 Added Registration ID

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
iv 61287703G1-5B
Training
ADTRAN offers training courses on our products. These courses include overviews on
product features and functions while covering applications of ADTRAN product lines.
ADTRAN provides a variety of training options, including customized training and courses
taught at our facilities or at customer sites.
For inquiries concerning training, contact ADTRAN:
Training Phone: 888-4ADTRAN (888-423-8726)
Training Fax: [phone]
Training Email: [email protected]

61287703G1-5B v
Contents
Introduction
Scope of this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Intro-1
In this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Intro-1
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Intro-2
Section 1
4-POTS, 4-GigE MDU ONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Scope of this Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
In this Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Modules and Housings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Safety and Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Components and Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Mechanical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Outer Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Outer Enclosure Security Locking Feature . . . . . . . . . . . . . . . . . . . . . . . . 1-6
NID Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Data Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Voice Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Alarm Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
ONT Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Ethernet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
POTS Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
UPS Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Section 2
Installation and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Scope of this Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
vi 61287703G1-5B
In this Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
ONT Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Shipping Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Necessary Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Instructions for Installing the MDU ONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Determining ONT Enclosure Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Mounting the Enclosure Outdoors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Ground Wire Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Alternative Grounding Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Local Power Source Wire Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Fiber Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
Straight Fiber Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
OptiTap Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Install Electronics Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Fiber Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Install Power /Alarm Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Installation of UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Install Subscriber Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Indoor ONT Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23
Commissioning and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26
Turn-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Secure the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Test for POTS Line Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Register the ONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Set Registration ID Activation using Lineman’s Handset . . . . . . . . . . . . . . . 2-28
Provision Ethernet Interface at OLT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
Section 3
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Scope of this Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
In this Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Faults Indicated with LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
LEDs in Normal State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
LEDs in Fault State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Power LED off or Flashing Green . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Battery LED Off or Flashing Green . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
FAIL LED Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
NET LED Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
MGT LED Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
POTS Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

61287703G1-5B vii
Cleaning and Inspection of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
General Cleaning Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Connector Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Bulkheads and Receptacles Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
Dry Cleaning Technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Wet Cleaning Technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Signal Level Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Downstream Signal Level Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Upstream Signal Level Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12
Appendix A
Warranty and Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
ADTRAN Customer Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
ADTRAN Sales. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
ADTRAN Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
ADTRAN Repair/CAPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Repair and Return Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
viii 61287703G1-5B

61287703G1-5B ix
Figures
Figure 1-1. Total Access 374 4 POTS 4 GigE MDU ONT . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1-2. Total Access 374 MDU ONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 1-3. Enclosure and Electronics Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Figure 1-4. Uninterruptible Power Supply (UPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Figure 1-5. Battery Backup Unit (BBU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Figure 2-1. Typical ONT Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Figure 2-2. Enclosure Mounting Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Figure 2-3. ONT Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Figure 2-4. Straight Fiber Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Figure 2-5. OptiTap Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Figure 2-6. OptiTap Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Figure 2-7. Electronics Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Figure 2-8. Connect Fiber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Figure 2-9. Completed Fiber Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Figure 2-10. ONT Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Figure 2-11. Power to the Electronics Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Figure 2-12. UPS Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Figure 2-13. Install Subscriber Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Figure 2-14. Indoor Mounting Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Figure 2-15. Indoor ONT Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Figure 2-16. Ground Indoor Wall Mount ONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Figure 3-1. Downstream Test Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Figure 3-2. Upstream Test Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
x61287703G1-5B
Tables
Table Intro-1. Topic List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intro-1
Table Intro-2. Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intro-2
Table 1-1. Topic List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 1-2. Modules and Housings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Table 2-1. Topic List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Table 2-2. Wire Gauge and Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Table 2-3. ONT Power/Alarm Connector Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Table 2-4. UPS Pin-Out Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Table 2-5. Ethernet Cable Pin-Outs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Table 2-6. Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Table 3-1. Section 2 Topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 3-2. Front Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Table 3-3. LED in Fault State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-4. Downstream Power Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Table 3-5. Upstream Power Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Table 3-6. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

61287703G1-5B Intro-1
Introduction
Introduction
Scope of this Guide
This document provides instructions for the installation and maintenance of the Total Access
374 4-POTS, 4-GigE MDU ONT, including LED descriptions, regulatory information, and
troubleshooting procedures.
In this Guide
This guide contains the topics listed in Table Intro-1.
Table Intro-1. Topic List
Section Topic Scope
Section 1 4-POTS, 4-GigE MDU ONT This section provides general information for
the individual ONTs included in this manual.
Section 2 Installation and Testing This section details the Installation procedures
for a typical ONT.
Section 3 Troubleshooting This section provides Troubleshooting proce-
dures applicable to all the Total Access 300
Series ONTs.
Appendix A Warranty and Customer Support This section contains information regarding
Warranty and Customer Service information.

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
Intro-2 61287703G1-5B
Related Documentation
Documentation for ADTRAN Carrier Networks products is available for viewing and
download directly from the ADTRAN Support Community website. Go to:
https://supportforums.adtran.com/welcome
Registration is required.
Refer to Table Intro-2 for related documentation.
Table Intro-2. Related Documentation
Title Part Number
Component-level Documentation
Total Access 374 4-POTS, 4-GigE MDU ONT Job Aid 61287703G1-22
Total Access 5000 System-level Documentation
Total Access 5000 Series Fiber to the Premises Deployment Guide 65K83FTTP-50
Total Access 5000/5006 Engineering Guide 65K87ENG-7

61287703G1-5B 1-1
Section 1, 4-POTS, 4-GigE MDU ONT
Section 1
4-POTS, 4-GigE MDU ONT
Scope of this Section
This section provides general information concerning the Total Access 374 4-POTS, 4-GigE
MDU ONT including available features, regulatory statements, components, and interfaces.
In this Section
This guide contains the topics listed in Table 1-1.
Description
The Total Access®374 4-POTS, 4-GigE Multi-Dwelling Unit (MDU) Optical Network Termi-
nation (ONT, P/N 1287703G1) provides a consistent and common approach to communi-
cation networks delivering:
■Voice
■Video
■Data
Figure 1-1 illustrates the ONT’s outer and inner enclosure.
Table 1-1. Topic List
Topic See Page
Description 1-1
Safety and Regulatory Compliance 1-4
Components and Interfaces 1-6

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
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Figure 1-1. Total Access 374 4 POTS 4 GigE MDU ONT
Features
The basic features of the ONT include the following:
■Box-in-box, weatherproof and access controlling construction
■Entry ports for fiber, power, ground, Ethernet, and telephone
■Reports alarms from the UPS power supply
■Data services supported by four 10/100/1000Base-T Ethernet interfaces
■Basic telephone service supported by four POTS interfaces
■12 VDC power supply
Surface Mounting Holes located
under Electronics Module
Ethernet
Connections
Ethernet
Connections
POTS
Connections
Security
Screw
Phone
Ethernet
Video
Fiber Drop
Cable
Power Supply
Cable and
Ground Wire
Surface Mounting Hole
located under
Electronics Module
Snap
Door
Retainer
Snap
Door
Retainer

61287703G1-5B 1-3
Modules and Housings
This manual covers the following electronic modules and housings:
Figure 1-2 illustrates the Electronics Module of the Total Access 374 MDU ONT.
NOTE
The Electronics Module is not designed to be removed after the initial
installation in the Network Interface Device (NID) housing.
Figure 1-2. Total Access 374 MDU ONT
Table 1-2. Modules and Housings
Total Access 374E Description CLEI
1287703G1 Total Access 374 4 POTS 4 GigE MDU ONT BVM9Z00B_ _
1187780G1 Total Access 374 NID Housing N/A
1187781G1 Total Access 374 Wall Mounting Plate N/A

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Safety and Regulatory Compliance
WARNING
!
■Read all warnings and cautions before installing or servicing this
equipment.
■The protective earth (PE) grounding wire for this product must be 6 AWG
(13.3 mm2) copper and utilize either a two-hole or a one-hole lug that is
used in conjunction with an anti-rotation device. The connector must be a
suitably approved ground wire connector.
CAUTION
C
This product uses a Class 1 Laser module that complies with 21 CFR 1040.10
and 1040.11 and IEC 60825-1 and -2. For continued compliance with the above
standards, install only ADTRAN-approved Class 1 Laser Modules in this
product.
CAUTION
!
Electrostatic Discharge (ESD) can damage electronic modules. When
handling modules, wear an antistatic discharge wrist strap to prevent
damage to electronic components. Place modules in antistatic packing
material when transporting or storing. When working on modules, always
place them on an approved antistatic mat that is electrically grounded.
CAUTION
!
■This product is intended to operate in ambient temperatures up to 65°C in
restricted access locations Only. This product is also intended to operate in
ambient temperatures up to 46°C in all other locations.
■This equipment contains no parts that can be serviced by the user.
NOTE
■Power supply input and output conductors of equipment, and signal
conductors of equipment which are exposed outside of the building, are
intended to be less than 140 feet (42.6 meters) in length and have adequate
clearance from power and lightning conductors in accordance with NEC
725 and 800. Final acceptance of the Listed equipment installation will
ultimately be up to the local Authority Having Jurisdiction (AHJ).
■This product is designed to operate with a nominal operating voltage of 12
VDC.
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.

61287703G1-5B 1-5
■This product meets EU RoHS Directive 2002/95/EC and/or applicable
exceptions. Refer to www.adtran.com for further information on RoHS/
WEEE.
This product is intended for deployment in Outside Plant Locations (for example, Customer
Premises). This product is to be installed and serviced by trained and qualified service
personnel only. Install this product in a restricted access location by trained service personnel
only in locations where the NEC applies (for example, Customer Premises).
This device is an FCC Class B device. This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by ADTRAN could void the user’s
authority to operate this equipment.

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Components and Interfaces
The ONT consists of the following components and interfaces:
■Mechanical Components
■Electronics Module
■Circuit Board
Mechanical Components
The ONT is designed for outdoor or indoor applications. The ADTRAN Model 374 Network
Interface Device (NID) housing is intended as a demarcation point between the Telco and a
subscriber premises for outdoor application. For indoor application, the NID housing is not
used. The demarcation point is the Electronics Module itself.
Outer Enclosure
The Outer Enclosure provides both environmental control (weatherproofing) and access
control.
Outer Enclosure Security Locking Feature
The enclosure is intended for use on the outside of a building and is designed to meet US
environmental requirements. The unit is weather hardened and is able to withstand 70 m.p.h.
wind driven rain, high temperature, cold temperature, drop tests and all other GR-49, 
GR-950, and GR-487 requirements. The dimensions are approximately 15” high x 9” wide x 4”
deep (38.1 cm x 24.8cm x 10.1 mm). The external door provides access to the RJ-11 test
connectors, and Ethernet RJ-45 connectors. The enclosure door is held in the closed position
by two “snap” door retainers. To open the door these two snaps must be disengaged at the
same time.
The Outer Enclosure Door has a double security locking feature provided by the third molded
part. This provides the following capabilities:
■Subscriber access door is closed using a Phillips head screw
■Telco personnel can control access via the Telcom Can Wrench

61287703G1-5B 1-7
NID Housing
The NID Housing base (refer to Figure 1-3) contains cable entry points for power, ground,
Telco incoming cabling and cabling to the customer premises. Each cable entry has grommets
to provide environmental protection. The cable entries also support strain relief with Tie-
wraps.
Figure 1-3. Enclosure and Electronics Module
NOTE
In the illustration above, note how the power wiring to the Insulation
Displacement Connector (IDC) has a different configuration. The wiring
configuration on the left is an example of a “completed” installation. The
illustration on the right is considered “pre-installation”. A pre-installation is
typically performed in advance of the Electronics Module being installed. The
only difference is that the Power wiring is moved from the NID Housing to
the base of the Electronics Module.
Insulation
Displacement
Connector
Insulation
Displacement
Connector

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Circuit Board
The Circuit Board is contained within the Electronics Module Housing.
WARNING
!
Do Not open the Electronics Module Housing or attempt to remove the
Circuit Board from the Electronics Module.
The ONT contains a single circuit board contained within the Electronics Module that
provides the following functions:
■Data Processing
■Voice Processing
■Alarm Reporting
Data Processing
The following data processing functions are performed:
■Traffic management (priority queuing, scheduling, policing and traffic shaping)
■Up to 16 VLANs
■IGMP Snooping
■QoS with four traffic classes per IEEE 802.1p
■Full IEEE 802.1Q VLAN ID processing per port
■64 byte to 1600 byte packet sizes
Voice Processing
The POTS Voice Processing feature set is listed below:
■Echo cancellation per ITU-T G.168 - up to 16 ms tails
■Caller ID FSK tone generation
■Fixed or adaptive jitter buffer
■Modem, fax tone detection
■DTMF detection/generation
■RTP/RTCP
■Silence suppression
■Comfort noise generation
■SIP
■MGCP
■GR-303
■RFC 2833
■Voice activity detection
■Configurable framing size - 10 ms, 20 ms, or 30 ms
■G.711 µ-law/A-law, G.726-32, G.722, G.729