User's Manual

www.vyyo.com
System Configuration Introduction – p. 10
Chapter 1. System Configuration
Introduction
This guide is intended as a practical aid for the Technicians, Operators and Field
Service Engineers responsible for quickly configuring Vyyo systems at most
common installations. It is not intended as a substitute for a detailed reference
manual.
NOTE: Throughout this manual the terms modem and
WMU are used interchangeably. The term “WMU” refers
to “Wired/wireless Modem Unit”. In some instances the
actual modem model (V280, V311, etc.) may be used if
the information is specific to that modem.
The term “WMTS” is used interchangeably with “XMTS”.
XMTS is an acronymn for “Xtend Modem Termination
System”. Both terms appear in the software and were
derived from the term “CMTS”, “Cable Modem
Termination System”.
The term “WMU” will appear in the software occasionally.
It is an acronymn for “Wireless Modem Unit” and is used
interchangeably with “CM” (Cable Modem).
1.1 Overview
The system acts as an RF bridge between a network, typically the Internet or the
Public Switched Telephone Network (PSTN) (at the head end) and customer
equipment at the other end of the RF link.
It may be visualized as a three layer protocol stack. The highest layer may be
any one of the following: IP, E1/ T1 or PSTN.
All systems include the IP capability, which is required for network management.
The E1/T1 capability requires an additional plug-in card at the WMTS
Internet
or
PSTN
Wireless or HFC Network
Customer Premises
WMTS
Cable
Modem
(CM)
Customer
Equipment