ZyXEL Communications P841C, User Manual, Page: 9 / 41

P841C Central-Side VDSL Modem
Preface ix
Preface
Congratulations on your purchase of the Prestige 841C Central-Side VDSL Modem.
This preface introduces you to the Prestige 841C and discusses the organization and conventions of this user’s
guide. It also provides information on other related documentation.
About VDSL
VDSL (Very high bit rate Digital Subscriber Line) is one type of DSL with very high data rates. The service can be
asymmetrical or symmetrical and can be used on the same wire as the POTS (Plain Old Telephone Service)
network and ISDN in conjunction with voice services.
About the P841C
The Prestige 841C is the ideal VDSL Line Termination (LT) modem for telephone companies. It maps one Ethernet
link to one VDSL link effectively extending Ethernet service up to 1.5km The Prestige 841C attains speeds ranging
from 1.56 Mbps to 16.67 Mbps upstream and 4.17 Mbps to 16.67 Mbps downstream at distances of up to 1.5 Km
(5,000 feet) over ordinary telephone lines.
General Syntax Conventions
•
“Enter” means for you to type one or more characters and press the carriage return. “Select” or “Choose”
means for you to select one from the predefined choices.
•
For brevity’s sake, we will use “e.g.” as shorthand for “for instance”, and “i.e.” as shorthand for “that is” or “in
other words” throughout this manual.
•
The Prestige 841C may be referred to as the P841C throughout this manual.
Related Documentation
ZyXEL Web Site
The ZyXEL web site at www.zyxel.com contains an online glossary of networking terms and a download library
with additional support documentation.