
901 Explorer Boulevard
P.O. Box 140000
Huntsville, AL 35814-4000
(256) 963-8000
© 1999 ADTRAN, Inc.
All Rights Reserved.
Printed in U.S.A.

ADTRAN Year 2000 (Y2K) Readiness Disclosure
ADTRAN has established a Year 2000 program to ensure that our products will correctly function in
the new millennium. ADTRAN warrants that all products meet Year 2000 specifications regardless of
model or revision. Information about ADTRAN's Year 2000 compliance program is available at the
following:
Product Matrix www . adtran.com/y2kfax.html
E-mail year2000@adtran.com
Faxback Document Line (256) 963-8200
Y2K plans and product certifications are listed in the Product Matrix (see above)
Y2K Project Line (256) 963-2200
iii

Federal Communications Commission Radio Frequency Interference Statement
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio frequencies. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Change or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment .
iv

Table of Contents
List of Figures ......................................................................................................................vii
List of Tables .........................................................................................................................ix
Chapter 1 Introduction .........................................................................................................................1-1
Voice Compression Module Overview .........................................................................................................1-1
Functional Description ....................................................................................................................................1-1
Voice Compression Resources .............................................. ...... ....................................... ............................1-1
Physical Description ........................................................................................................................................ 1-2
Related Documents .......................................................................................................................................... 1-2
Chapter 2 Installation ...........................................................................................................................2-1
Unpack and Inspect ......................................................................................................................................... 2-1
Contents of Adtran Shipment ........................................................................................................................2-1
Installing the VCOM Module .........................................................................................................................2-1
Power-up and Initialization ............................................................................................................................ 2-2
Failed Self-test ...................................................................................................................................................2-2
Warranty and Customer Service ....................................................................................................................2-2
Chapter 3 Operation .............................................................................................................................3-1
Overview ........................................................................................................................................................... 3-1
Security Passwords ................................................................................................................................... 3-1
Terminal Menu Structure ................................................................................................................................ 3-1
Menu Access .....................................................................................................................................................3-3
Menu Descriptions ...........................................................................................................................................3-3
Modules Menu Descriptions ................................................................................... ....................................... 3-4
Slt .................................................................................................................................................................3-4
Type ............................................................................................................................................................ 3-4
Menu ...........................................................................................................................................................3-4
Alarm ..........................................................................................................................................................3-4
Test .............................................................................................................................................................. 3-4
State .............................................................................................................................................................3-4
Status ..........................................................................................................................................................3-5
Rev ..............................................................................................................................................................3-5
VCOM Menus ...................................................................................................................................................3-6
Info .............................................................................................................................................................. 3-6
Part Number ..............................................................................................................................................3-6
Serial Number ........................................................................................................................................... 3-6
Board Revision ........................................................................................ ....................................... ...... .....3-7
Firmware Revision ....................................................................................................................................3-7
Status ..........................................................................................................................................................3-7
Device ......................................................................................................................................................... 3-7
State .............................................................................................................................................................3-7
61200221L1-1 VCOM Module User Manual v

Table of Contents
Algorithm ................................................................................................................................................... 3-7
Silence ......................................................................................................................................................... 3-8
Connection ................................................................................................................................................. 3-8
Frame Type ................................................................................................................................................3-8
Config .........................................................................................................................................................3-9
Device .........................................................................................................................................................3-9
State ........................................................................................................................................................... 3-10
Test ............................................................................................................................................................ 3-10
Device .......................................................................................................................................................3-11
Usage Time ..............................................................................................................................................3-11
ATLAS Frms ...........................................................................................................................................3-11
ATLAS Drop ............................................................................................................................................3-11
VCOM Frms .............................................................................................................................................3-12
VCOM Drop .............................................................................................................................................3-12
Clear .......................................................................................................................................................... 3-12
ATLAS Features used with VCOM Modules .............................................................................................3-12
Factory Restore .................................................. ..... ........................................ .................................. ..... ..3-12
System Self-Test ......................................................................................................................................3-13
Index .............................................................................................................................Index-1
vi VCOM Module User Manual 61200221L1-1

List of Figures
Figure 1-1. VCOM Module ....................... ...... ..... ........................................ ...... ........................................... 1-2
Figure 2-1. VCOM Rear Chassis................................................................................................................... 2-2
Figure 3-1. VCOM Menu Tree...................................................................................................................... 3-2
Figure 3-2. Modules Menu with VCOM Installed..................................................................................... 3-3
Figure 3-3. VCOM Menus...................................................................... .................................... ................... 3-6
Figure 3-4. VCOM Menus: Info............................................ ........................................ ..... ........................... 3-6
Figure 3-5. VCOM Menus: Status ......................................................... ...... ................................... .............. 3-7
Figure 3-6. VCOM Menus: Config.................................................................... ..... ...................................... 3-9
Figure 3-7. VCOM Menus: Test............................................................................................... ..... .............. 3-11
61200221L1-1 VCOM Module User Manual vii

List of Figures
viii VCOM Module User Manual 61200221L1-1

List of Tables
Table 3-1. Sources for Controlling the VCOM Module ...........................................................................3-1
Table 3-2. Status Messages ..........................................................................................................................3-5
Table 3-3. Status Conditions .......................................................................................................................3-7
Table 3-4. Voice Compression Algorithms ............................................................................................... 3-8
Table 3-5. Possible Configuration States ................................................................................................. 3-10
61200221L1-1 VCOM Module User Manual ix

List of Tables
x VCOM Module User Manual 61200221L1-1

Chapter 1
Introduction
VOICE COMPRESSION MODULE OVERVIEW
The Voice Compression Module (VCOM Module) combines with other
ATLAS components to implement a voice over frame relay (VoFR) capabil-
PLUS
ity in the ATLAS 800
VCOM Module occupies a single slot in the ATLAS chassis. You can order
the VCOM Module with support for 8, 16, 24, or 32 simultaneously compressed calls.
series of Integrated Access Systems. The
FUNCTIONAL DESCRIPTION
The VCOM Module installs into any available slot in the ATLAS 800
chassis. You can view the module status from the ATLAS front panel (see
Chapter 4 of the ATLAS 800
menu to provide additional status information, configure the module, and
download application software. Access the terminal menu either via a
VT-100 terminal connected to the ATLAS Base Unit's control port or via a
Telnet session established through the Base Unit's Ethernet port.
VOICE COMPRESSION RESOURCES
• The VCOM Module ordering options provide 8, 16, 24, or 32 voice compression resources.
• The VCOM Module provides automatic selection of CCITT Standard or
ADTRAN-proprietary voice compression algorithms based on endpoint
configuration.
• The VCOM Module supports FAX at 14400 bps.
• The VCOM Module includes dual-tone, multi-frequency (DTMF) generation and detection.
• The VCOM Module enables and disables individual voice compression
resources.
PLUS
User Manual). Y ou can also use the terminal
PLUS
61200221L1-1 VCOM Module User Manual 1-1