NOTICE
While reasonable efforts were made to ensure that the information in this 
document was complete and accurate at the time of printing, Lucent 
Technologies can assume no responsibility for any errors. Changes or 
corrections to the information contained in this document may be incorporated 
into future issues.
TO ORDER COPIES OF THIS DOCUMENT 
Contact: Lucent Technologies Publications Center
P.O. Box 4100
Crawfordsville, IN  47933
Domestic: 1 800 457-1235 International: 1 765 361-5353
Domestic Fax: 1 800 457-1764 International Fax: 1 765 361-5355
Order:  Document No. 555-230-739
Issue 2, September 1997 
HEARING AID COMPATIBILITY 
The 6400-Series voice terminals are Hearing Aid Compatible (HAC). In 
addition, some units have “HAC”  printed on them.
YOUR RESPONSIBILITY FOR YOUR SYSTEM’S SECURITY 
You are responsible for the security of your system. Lucent Technologies does 
not warrant that this product is immune from or will prevent unauthorized use 
of common-carrier telecommunication services or facilities accessed through 
or connected to it. Lucent Technologies will not be responsible for any charges 
that result from such unauthorized use. Product administration to prevent 
unauthorized use is your responsibility and your system manager should read 
all documents provided with this product to fully understand the features 
available that may reduce your risk of incurring charges.
TRADEMARKS
DEFINITY and AUDIX are registered trademarks of Lucent Technologies.
Mirage, Star Set, and Supra are registered trademarks of Plantronics, Inc.
OBTAINING PRODUCTS
To learn more about Lucent Technologies products and to order any of these 
products, contact Lucent Direct, the direct-market organization of Lucent 
Technologies Business Communications System. Access their web site at 
www.lucentdirect.com or call the following numbers: customers should call 
1 800 451-2100 or account executives can contact Lucent Direct at 
1 800 778 1880 (voice) or 1 800 778-1881 (fax).
THE “CE” MARK
If the “CE” mark is affixed to this equipment. it means that it conforms to the 
European Union Electromagnetic Compatibility Directive (89/336/EEC) and 
the Low Voltage Directive (73/23/EEC).
Prepared by © 1997 Lucent Technologies
BCS Product Documentation Development All Rights Reserved
Middletown, New Jersey  07748-9972 Printed in USA