Vyyo V3000-C, V3000-A Users Manual

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Table Of Contents – p. 1

XMTS T1 Access
Concentrator

XMTS

Network Release 3.5.x

P/N: 9090-090

System Configuration

Guide

Manual Version: 1.0.13

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Table Of Contents – p. 2

Copyright and Trademark Information:

© 2005 Vyyo Inc. All rights reserved.

Vyyo Inc. reserves the right to alter the equipment specifications and descriptions in this publication without
prior notice. No part of this publication shall be deemed part of any contract or warranty unless specifically
incorporated by reference into such contract or warranty.

The information contained herein is merely descriptive in nature, and does not constitute a binding offer for
the sale of the product described herein. Any use of the Vyyo Inc. logo or trademarks is forbidden without
prior written approval from Vyyo Inc.

All trademarks mentioned herein are the property of their respective owners.

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Table Of Contents – p. 3

Table Of Contents

Table Of Contents................................................................................ 3

Installation and Safety Information ...................................................... 7

Chapter 1. System Configuration Introduction.................................. 10

1.1 Overview...............................................................................................10

1.2 Equipment Capabilities.........................................................................13

1.3 XMTS....................................................................................................13

1.4 Modems................................................................................................16

1.4.1 Modems with DOCSIS and IP only................................................16

1.4.2 Modems with DOCSIS, IP and E1/T1............................................17

1.4.3 Modems with DOCSIS, IP and PSTN............................................18

1.4.4 Modems with DOCSIS and IP Only With Built in UHF Radio ........19

1.5 Modem Capabilities Matrix ...................................................................20

Chapter 2. Configuration Overview................................................... 21

2.1 Network Servers ...................................................................................21

2.1.1 DHCP Server.................................................................................21

2.1.2 TFTP Server..................................................................................21

2.1.3 Time-of-Day (TOD) Server ............................................................21

2.2 RF Link Layer .......................................................................................21

2.3 DOCSIS Layer......................................................................................22

2.4 IP Layer ................................................................................................23

2.5 E1/T1 Layer ..........................................................................................24

2.6 Configuration Tools and Files Matrix ....................................................26

Chapter 3. The Modem Initialization Process ................................... 28

3.1 Modem Initialization Sequence .....................................................28

3.1.1 Power-On Self Test ..........................................................................28

3.1.2 Downstream Synchronization.............................................................29

3.1.3 Obtaining Upstream Parameters ........................................................29

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Table Of Contents – p. 4

3.1.4 Ranging ..........................................................................................29

3.1.5 Establish IP Connectivity ...................................................................29

3.1.6 Establish Time of Day .......................................................................30

3.1.7 Transfer Operational Parameters .......................................................30

3.1.8 Registration .....................................................................................30

3.1.9 Baseline Privacy Initialization (BPI).....................................................30

Chapter 4. Overview of the XMTS and Modem Configuration ......... 31

Chapter 5. Adding a Modem to the XMTS........................................ 34

5.1 Editing the Modem Configuration File...................................................35

5.1.1 Setting the Upstream Channel ......................................................35

5.1.2 Setting the Downstream Frequency ..............................................38

5.1.3 Setting Concatenation and Fragmentation Capabilities.................39

5.1.4 Setting Upstream QoS (Class of Service) for IP Data ...................40

5.1.5 Setting Additional Downstream and Upstream Channels ..............41

5.1.6 Setting the Maximum Number of CPEs .........................................42

5.2 DHCP Settings for the Modem .............................................................43

5.2.1 IpLease DHCP Server: Editing and running the CM.SRC File ......43

5.2.2 Windows 200x Server Edition: Modifying the DHCP Options .......48

5.3 Configuring the XMTS ..........................................................................57

5.3.1 Setting the XMTS Upstream Parameters ......................................57

5.3.2 Setting the XMTS Downstream Parameters..................................63

5.4 Setting the Modem’s Downstream Frequency ......................................67

5.5 Verifying the Modem Downstream and Upstream Status .....................74

5.6 Using an HTTP Connection to View Modem Operation........................76

5.6.1 Viewing the internal modem HTML pages:....................................76

5.6.2 Viewing the Connection Page .......................................................78

5.6.3 Viewing the Software Page ...........................................................79

5.6.4 Viewing the Security Page.............................................................80

Chapter 6. Configuring a T1 Connection .......................................... 81

6.1 Configure the Modem for T1 Operation ................................................82

6.2 Adding the T1 modem to the XMTS T1 Interface and Assign Port(s) ...91

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Chapter 7. Setting the XMTS IP Address ....................................... 102

Chapter 8. Installing Vyyo Servers for XMTS Operation ................ 112

8.1 Installing The Time Server:.................................................................112

8.2 Installing the Pumpkin TFTP Server: ..................................................112

8.3 Installing IPLease DHCP Server:........................................................ 115

8.3.1 dhcpsvr.ini ...................................................................................115

8.3.2 cm.src..........................................................................................116

8.3.3 Dhcpgen ......................................................................................118

8.3.4 DhcpSvr:......................................................................................121

Chapter 9. Maintenance and Troubleshooting................................ 122

9.1 Introduction.........................................................................................122

9.2 Troubleshooting the RF Frontend.......................................................122

9.2.1 General........................................................................................122

9.2.2 Checking the Downstream ..........................................................123

9.2.3 Checking the Upstream ...............................................................124

Chapter 10. Troubleshooting The Subscriber Site ..................... 125

10.1 Post-Registration Verification .............................................................125

10.2 Physical Layer Troubleshooting.......................................................... 125

10.3 IF Layer Troubleshooting....................................................................125

10.4 Troubleshooting the NMS ...................................................................126

10.5 Repairs Safety ....................................................................................126

Chapter 11. Synoptics Display for XMTS Configuration............. 128

11.1 Setting the XMTS Upstream Parameters ..................................................128

11.2 Setting the XMTS Downstream Parameters..............................................134

Appendix A. XMTS US Port Mapping ......................................... 138

Appendix B. Checking the XMTS Version................................... 139

Appendix C. Installing and Uninstalling the NMS........................ 142

C.1 First Time Installation.......................................................................... 142

C.2 Invoking Vyyo NMS ............................................................................ 142

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Table Of Contents – p. 6

C.3 Installation Upgrade............................................................................142

C.4 Uninstalling the NMS ..........................................................................143

INDEX 144

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Installation and Safety Information – p. 7

Installation and Safety Information

The following information is provided to ensure
safe operation of this equipment. Xtend
Networks assumes no liability in the event that
the customer fails to comply with the following
safety precautions and warnings.

System Power-on

AC System

DC System

AC System Power

The XMTS power supplies are factory wired for 115 ~ 220 VAC (2 X
200W). A power cords are provided to connect the unit to the power
source. To operate the XMTS, turn ON the power switch at the rear panel.

Warning!

Set the fuse selector on the rear panel to the proper position

(110V or 220V), before plugging in the power cord, or turning on the
XMTS.

DC System Power

1. When connecting DC power lines make sure to connect Ground line
first.

2. When disconnecting DC power lines – make sure to disconnect ground
last.

3.External Circuit Breaker (DuPole) should be used before
connection/removal of the power cable to/from the XMTS.

4. FUSE Replacement – Make sure to use same type and value fuse !!

Note that UL requires use of AC ceramic high breaking capacity 10Amp
fuse.

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Installation and Safety Information – p. 8

Earthing

General

The minimum cross sectional area of the protective
earthing should be 1mm2 .

T1 Cable

General

T1 cable to be used with XMTS T1 ports is only 26AWG
communication cable (the common cable for this application).

Repairs Safety

General

1. Repairs of XMTS should take place only in Xtend Networks
company service laboratories or in other Xtend Networks
formally approved distributors service laboratories.

2. In case of field handling - Disconnect the unit from power
supply for safest repair.

3. 2. In case of a -48VDC operated XMTS, the External Circuit Breaker

(Du Pole) must be used before connection/removal of the power cable
to/from the XMTS.

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Installation and Safety Information – p. 9

Safety Summary

Warnings:

Carefully connect units to the supply circuit so that
wiring is not overloaded. For DC system connect
Ground first (or remove Ground last for disconnect).

Read the installation instructions before connecting
the system to its power source.

Secure all power cabling when installing this unit.

Do not touch the power supply when power cord is
connected. For systems with a power switch, line
voltages are present within the power supply, even
when the power switch is off and the power cord is
connected. For systems without a power switch, line
voltages are present within the power supply when the
power cord is connected

The device is designed to work with TN power
systems

Before working on equipment that is connected to
power lines, remove jewelry (including rings,
necklaces, and watches). Metal objects will heat up
when connected to the power and ground. This can
cause serious burns or weld the metal object to the
terminals

Repairs of XMTS should take place only in Xtend
Networks company service laboratories or in other
Xtend Networks formally approved distributors service
laboratories. In case of field handling our general
SAFETY warning is to disconnect the unit from power
supply for safest repair.

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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: Througout 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, V301, etc.) may be used if
the information is specific to that modem.

The term “XMTS” is used interchangeably with “WMTS”.
XMTS is an acronymn for “Xtend Modem Termination
System” and will replace WMTS , “Wired/wireless Modem
Termination System”.

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 XMTS
(Cable/Wireless Modem Termination System) end and a corresponding
cable/wireless modem at the downstream end.

Internet
or
PSTN

Hybrid Fiber/Coax Cable Network

Customer Premises

XMTS

Cable
Modem
(CM)

Customer
Equipment

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System Configuration Introduction – p. 11

The data from the IP, E1/T1, or PSTN layer are encapsulated as DOCSIS frames
which in turn are converted into RF signals and sent over the air or via an HFC
(Hybrid Coax Fibre) plant between the XMTS and modem.

Important Note: connectivity MUST be obtained at each
layer, beginning with the lowest (RF link) in order to
establish full communication.

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System Configuration Introduction – p. 12

The following diagram illustrates this in the form of a three layer protocol

IP, E1/T1, POTS

RF Link

DOCSIS
XMTS

Modem

IP, E1/T1, POTS

RF Link

DOCSIS
Layer 3

Layer 2

Layer 1

RxTxV280 Modem
100BaseT

IP Network

MTA

PC

Line #2

Line #1
Phone

RJ-11

RJ-11

PSTN

H.323v2 or
MGCP, VOIP

Packet
Voice

E1/T1

V311 E1/T1 Modem

IP Router

Provisioning
Services

XMTS

Internet

Telephone
Switch

PBX

Intranet

RF Coax

RF Cloud or
Cable Plant

100BaseT

E1/T1

100BaseT

stack:

This illustration shows how a complete system is connected:

Connection Legend:

Blue = 100BaseT Ethernet

Green = RF Coaxial cable

Black = T1/E1

Grey = RJ-11

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System Configuration Introduction – p. 13

There are different configuration requirements for each layer and different
software tools accomplish this task. The configuration of the RF link is typically
unique to each installation with the particular downstream and upstream
frequencies, modulations and bandwidths being the critical parameters that must
be set on the modem and XMTS.

Whereas there is no set standard for implementing an RF link, DOCSIS is a fully
specified protocol as are the upper layers (IP, E1/T1 or PSTN). The following
sections will describe the currently available system components (equipment)
then detail how to configure each of them in turn.

1.2 Equipment Capabilities

There are several different modems available, the simplest being the DOCSIS
modems with IP-only capability. All of the other modems use these as their
foundation.

The XMTS used at the head end is the other major component. There is only one
basic configuration, which is augmented with additional plug-in cards to
accommodate E1/T1 and PSTN capabilities.

NOTE: The term XMTS was originally conceived as
“extended” CMTS for use in a cable plant, hence the “X”.
This was followed by WMTS in which the “W” indicates a
“wireless” CMTS. For practical purposes these terms are
interchangeable and in some places the software uses
the term “WMTS” when referring to any one of these
systems.

1.3 XMTS

The basic XMTS is a chassis with a power supply and a mid-plane PCI bus that
accommodates plug-in cards at the front and rear. Two redundant power supply
cards are provided at the right end of the front of the chassis.

The minimum required hardware configuration for an IP-only system consists of
one "HOST" card and three "Universal" cards. One Universal card acts as a
"Control and Forward" (C&F) card, one as the "Upstream" digital card and one as
the "Downstream" digital card. These latter two cards are attached to RF cards
in the rear slots. The E1/T1 capability is added by requires the Master4 card
(which replaces the older HOST card), and adding one or two E1/T1 interface
cards in the rear slots to provide 12 or 24 E1/T1 ports, respectively.

The HOST or Master4 card serves as the PCI bus arbiter and provides the
system clock and timing. When the XMTS boots, the Master4 card initializes,
then identifies the C&F card. The C&F card then directs the configuration and
downloading of relevant application software. The C&F card is connected
through a 100 BaseT Full Duplex connection to the switch or router and used to
transport data (including management packets) through the system.

All Universal cards are the physically identical: the card attached to them in the
rear slots and the application downloaded during initial startup determine the
function of the card (Upstream, Downstream or Control & Forward).

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System Configuration Introduction – p. 14

In the rear slots, one Downstream and one Upstream RF interface card are
required. Each of these corresponds to its companion Universal card. The
“Quad” downstream card has four RF connectors and provides four downstream
channels. The “Hex” upstream card has six RF connectors and provides six
upstream channels.

Note: All Downstream cards have a fixed output
frequency of 44 MHz which must be converted up per the
local requirements.

Upstream cards may be configured to receive any
frequency from 5-65 MHz

Figure 1-1. The XMTS Chassis with (from left to right) Upstream card, Downstream

card, Control and Forward card, MASTER4 card, and Power Supplies
shown.

The XMTS is mounted in a standard 19” by 6U high rack-mounted chassis.
The chassis has a fan tray above the unit, bringing the total height required
in the rack, to 8U. The eight bay chassis contains eight slots in the front, six
slots in the rear, and a mid-plane card in between, used to interface the
cards. Blank panels cover unused slots.

A standard 33 MHz, 32 bit Compaq PCI bus is used to transfer traffic and
data between the system cards. The power supplies, Master4 card and the
universal cards are inserted in the front slots of the chassis. The Quad
Downstream, Hex Upstream, and E1/T1 cards are inserted in the rear slots
of the chassis.

The ON/OFF power switch and the fuse are located in the rear of the power
supply.

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System Configuration Introduction – p. 15

Figure 1-2. Midplane Cutaway View of XMTS; Universal Card Shown in Cutaway

attached to an RF card.

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System Configuration Introduction – p. 16

1.4 Modems

1.4.1 Modems with DOCSIS and IP only

The V280 is Vyyo’s “IP-only” modem. It uses an RJ45 connector (shown below)
on the rear panel to provide IP connection to the customer’s equipment. The
V280 supports up to 63 data users simultaneously and provides privacy,
authentication, service classification, prioritization, and traffic shaping.

The USB connector is not supported at this time. Check with Customer Support
for updates as they become available if you need this capability.

Figure 1-3. V280 Rear Panel

Figure 1-4: V280 Front panel

Hyperterm (a Windows terminal application which permits either a serial or direct
IP connection and is used in the following examples) or Telnet may be used to
connect the modem to a computer to configure parameters in the modem, such
as the downstream receive frequency. Any equivalent software utilities may be
used.

A basic XMTS unit (without E1/T1 capability) is all that is required at the head
end to complete an IP connection.

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System Configuration Introduction – p. 17

1.4.2 Modems with DOCSIS, IP and E1/T1

The V311 is a V280 modem (to provide the DOCSIS layer) with one E1/T1
interface (via an RJ45 connector on the front panel) added. In addition to IP
connectivity, it supports circuit switched E1/T1 applications. It has one 100
BASE-T port for IP data and one E1/T1 port which can support up to 32/24 time
slots.

The E1/T1 application supports framed or unframed E1/T1 services. In the case
of unframed configuration, all 32/24 time slots (including time slot 0) are delivered
over the air.

In the case of framed E1/T1 configuration, a full or fractional E1/T1 (any number
up to 31/23 time slots) can be delivered.

The V311 modem is shown in this image:

Figure 1-5: V311 Modem

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System Configuration Introduction – p. 18

The V312 is identical to the V311 but has two E1/T1 interfaces instead of one.

The XMTS at the head end requires one or two E1/T1 interface cards (plugged
into the rear slots, with the second E1/T1 card attached to the first one as a
daughter board) to work with the V311 or V312. The E1/T1 connection will be
terminated at one of the ports on this (rear) E1/T1 interface card(s). In addition,
a separate software load is required.

All modems have four LED indicators, described below.

Figure 1-6. LED Indicators

Table 1.1 LED Indicators, Functions, and Conditions

1.4.3 Modems with DOCSIS, IP and PSTN

The V313 is a V280 (for the DOCSIS layer) with a PSTN interface added: this
physical interface (provided with the V313) comprises four RJ45 connectors,
each of which connects to a special cable terminated in four RJ11 connectors,
allowing a total of sixteen PSTN devices to be connected.

The XMTS at the head end requires an E1/T1 card and a V5.2 AN stack
(additional software available from Vyyo) to work with this unit. If you plan to
deploy the V313 please contact your Vyyo representative.

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System Configuration Introduction – p. 19

1.4.4 Modems with DOCSIS and IP Only With Built in UHF Radio

The V284 modem is a basic V280 modem integrated with a built-in UHF radio
that provides an upstream RF output in the 710-716 MHz range. Internally the
V284 has a factory set intermediate frequency of 44MHz which is converted up to
yield an appropriate upstream frequency (This is preset at the factory for 700MHz
in the United States).

The downstream frequency ranges from 740-746MHz. Note that the RF setup of
this radio requires appropriate preplanning owing to the complexity introduced by
the internal UHF radio. Please reference the UHF System Installation Guide
and/or your local system engineer.

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System Configuration Introduction – p. 20

1.5 Modem Capabilities Matrix

Modem
Model

Modem
Hardware

Connectivity

Additional
XMTS Cards
required

Description

V280

V280

IP

none

The basic DOCSIS modem

V311

V280
plus
E1/T1
card

IP, E1/T1

E1/T1
interface
card and
Master4 card

A V280 modem with one
E1/T1 interface (one RJ48
connector on the front which
can handle one E1 or T1
line)

V312

V280
plus
E1/T1
card

IP, E1/T1

E1/T1
interface
card and
Master4 card

A V280 modem with two
E1/T1 interfaces (two RJ48
connectors on the front
which can handle one E1 or
T1 line each)

V313

V280
plus
internal
PSTN
card

IP, PSTN

E1/T1
interface
card and
Master4
card with
additional
V5.2 AN
stack

A V280 modem with a built­in PSTN interface (four
RJ45 connectors each of
which attaches to four RJ11
POTS connectors)

V284

V280
plus
internal
UHF
radio

IP

none

A V280 modem with an
internal UHF radio for
communication in the
700MHz range – special RF
configuration is necessary.
Please see the UHF System
Installation Guide.

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Configuration Overview – p. 21

Chapter 2. Configuration Overview

This section of the System Configuration Guide features a short overview of each
component/layer of the System including the XMTS and the modems. The last
section is a summary presented as a matrix that shows the relationships between
the various tools and files. The components and layers are described below.

• Network Servers

o DHCP Server

o TFTP Server

o Time of Day (ToD) Server

• RF Link Layer

• DOCSIS Layer

2.1 Network Servers

The following servers are required for successful completion of modem
initialization. They will be accessed by the modem and the XMTS at specific
points during the registration and installation process.

2.1.1 DHCP Server

This server binds the modem’s MAC address to both its Network IP address
and its configuration (or “boot”) file, which contains several important system
specific parameters required for the modem to communicate with the XMTS.
Viewing this information can help in troubleshooting any problems which may
occur.

2.1.2 TFTP Server

This server downloads the selected configuration file to the modem during
the registration process when the modem requests it. It also downloads files
and configuration information to the XMTS. This information is used for
initial (first time) startup and for troubleshooting.

2.1.3 Time-of-Day (TOD) Server

This server provides the Time of Day to the modems and the XMTS. It allows
the XMTS and the modem to coordinate their timing.

2.2 RF Link Layer

This network layer is unique for each installation and depends on the
available frequencies, the frequency plan, the specific hardware used for the
installation, and other factors.

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Configuration Overview – p. 22

Your System Engineer must develop a detailed system plan that accounts
for each of these variables. This plan must include the assignments of
downstream frequencies, modulations (and other RF parameters) and
upstream channel IDs assigned to the various modems deployed in the
network. If the modems are to be used with E1/ T1 connections, all related
parameters, especially QoS (Quality of Service, also referred to as Class of
Service) parameters, also need to be defined (these are discussed later in
this document.)

NOTE: The methods to define these factors are unique
to each customer and are outside the scope of this
document. They are part of the site preparation and pre­planning, including any “overbooking” scheme that may
be desired. Please consult your Vyyo representative or
system integrator for assistance.

The Downstream and Upstream frequencies, modulations and bandwidths
MUST be pre-determined in order to proceed with the configuration of the
XMTS and the modems. Each modem must be assigned to a specific XMTS
Upstream Channel (the upstream channel is referenced by its Channel ID
which identifies the physical port.) The Upstream channel must be
configured for a specific frequency, modulation and bandwidth or symbol
rate.

NOTE: The XMTS must be configured to use the correct
Upstream and Downstream parameters. This is done
using the Vyyo Configuration tool.

It also recommended that each modem is assigned to a particular
Downstream channel (or set of channels.) The modem can use Downstream
channel discovery, however; it is typically not used since it takes much
longer to discover the correct frequencies.

Using pre-determined frequencies also allows greater control over the RF
frequency assignments and can distribute network bandwidth more
efficiently. A range of frequencies can be defined in the modem
configuration file to cover all customer assigned bands and to minimize
future re-configuration.

NOTE: The modem’s Downstream ferequency is preset
at the factory but may be changed on the modem by
using a direct Telnet connection. See Section 5.4 Setting

the Modem’s Downstream Frequency for details.

2.3 DOCSIS Layer

The most important items that must match are:

The XMTS Downstream Frequency and the modem Downstream Frequency

The XMTS Upstream Channel ID and the modem Upstream Channel ID (their
associated parameters must also match.)

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Configuration Overview – p. 23

First, the modem searches for a signal at its preprogrammed Downstream
Frequency. Once having locked to that downstream channel, the modem
receives upstream channel descriptors (UCDs) from the XMTS that describe the
available upstream channels.

NOTE: The XMTS must be configured to construct the
UCDs so that they correspond to the site preplan. Use
the Vyyo Config Tool to accomplish this if any changes
are required.

The modem then enters a protocol exchange that requires data be transmitted
from the modem to the XMTS via an Upstream Channel using its associated
Channel ID (designating the physical interface on the RF Interface card), and the
correct frequency, modulation and bandwidth or symbol rate.

NOTE: A modem configuration file which respecifies
these parameters is downloaded to the modem after
“ranging” (described below) is complete . This file is also
referred to as the modem “boot” file. All further
communication done by the modem uses the parameters
specified in this file. The modem configuration file is
modified using the WMUconfigFileEditor tool. ( WMU
stands for Wireless Modem Unit.)

This protocol exchange allows the modem to ‘range’ (adjust its timing and power
level so that it can work successfully with all of the other modems on line at this
time.). After the ranging is finished, the modem has successfully established
physical layer and Link or MAC layer connectivity with the XMTS. The XMTS is
now capable of sending MAC layer packets such as DHCP and ARP requests
required to complete the registration process.

2.4 IP Layer

Your System Engineer must devise a Network IP Plan. This is required in order
to assign IP addresses to the XMTS and all the modems on the network. It must
include the IP address of all the servers as well as the network mask and other
network parameters.

After connectivity is established at the DOCSIS layer (discussed in Section 2.3

DOCSIS Layer ), the modem is assigned to an IP address by using DHCP

(Dynamic Host Control Protocol.) If using the ipLease tool as the DHCP Server,
this is usually a static IP address defined in the DHCP setup file (CM.SRC.) This
file binds the modem's MAC address to a particular fixed IP address. If using
Windows 2000 Server Edition this binding is accomplished using its DHCP
Administrative Tool, which may be installed at the user’s option using the “netsh”
command (follow the instructions provided with your server).

The DHCP server grants the “lease” on the IP address to the modem (i.e., tells

the modem which IP address to use). The granted IP address is for SNMP
connectivity within the Vyyo system; it is not offered as a public IPaddress to
Vyyo equipment. However, if desired this can be done using the customer PC or
Router as the modem will behave as Layer 2 bridge device.

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Configuration Overview – p. 24

For the ipLease DHCP Server tool, the CM.SRC file is an ASCII text file that may
be edited using any text editor (such as Notepad). This document describes the
configuration process using the ipLease tool. The changes are similar for other
DHCP servers. Note that if another operating system, such as the Windows
200x Server, is used a DHCP server is often included. Check with your Vyyo
representative to make sure the DHCP server is compatible.

NOTE: Before the modem can acquire an IP address, the
XMTS must be configured with its own IP address This
procedure is described later in this document in the
section entitled Setting the XMTS IP Address. The XMTS
IP address is specified in a different configuration file
(regtree.rtr) which may be edited using the
wmtsConfigurationFileEditor tool.

After the modem successfully receives its IP address it contacts the TOD server
to establish the time of day. Next, it contacts the TFTP server to download the
modem configuration file, which specifies the final DOCSIS parameters for the
modem. This file is also referred to as the modem “boot” file. All further
communication done by the modem uses the parameters specified in this file.
This file may cause the modem to change frequencies or reboot in order to reset
some of its configuration parameters. The modem will acquire this file every time
it is reset or restarted. Configuration changes to the modem configuration file
(profile) will be done from the Operation center with out the need to visit the
modem remote location for any setup change; These changes may include
encryption, QoS., IP filters, downstream channel parameters. etc….

NOTE: the modem configuration file is modified using the
WMUconfigFileEditor tool..

During the final phase of the DOCIS registration process, the modem sends a
registration message to the XMTS confirming that the configuration file was
received. The XMTS retrieves a copy of the configuration file from the
configuration file server TFTP root repository directory. The XMTS then
compares the file from the server with the data from the modem to ensure that
the modem will only use services for which it was authorized. The modem is then
finally allowed to transmit real user data into the network, but only after the
modem’s configuration file values are crosschecked by the XMTS.

At this point, a data only modem will be successfully connected to the system.

2.5 E1/T1 Layer

After IP connectivity is established, E1 or T1 connectivity may be established.
Note that in addition to installing an E1/T1 card into the XMTS chassis, E1 and
T1 each require that different firmware be loaded into both the XMTS and the
modem.

The E1/T1 configuration will require appropriate changes to the modem
configuration file in addition to setting those configuration parameters used for a

www.vyyo.com

Configuration Overview – p. 25

standard IP-only modem. The same modem configuration file may be used for
several modems provided the Downstream frequencies and the Upstream
Channel ID are the same (i.e., same “profiles”).

The XMTS E1/T1 configuration needs to be modifed appropriately for every
E1/T1 modem installed on the network. This is done using the Java™-based
Vyyo Configuration tool. This tool configures the E1/T1 port on the modem to be
connected (“bound’) to the correct E1/T1 port on the E1/T1 card plugged into the
XMTS.

After this tool is used to bind the E1/T1 ports together and the standard modem
provisioning is done, the installation is complete and the E1/T1 services in the
modem are ready to be activated.

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Configuration Overview – p. 26

2.6 Configuration Tools and Files Matrix

Tool

Configured

File or

Device

Description

WMUConfigurationFileEditor

Modem
Configuration
file (e.g.,
“MIC_xxx.cfg”,
where xxx is
some unique
number.)

This file downloads to a modem
during the registration process.
It contains all the parameters
required for the modem’s
operation in the DOCSIS
network: upstream and
downstream frequencies, QoS,
etc. It is also call the modem
“boot” file.

WMTSConfigurationFileEditor

(any standard ASCII text file
editor may also be used to
edit the file)

Regtree.txt

Regtree.txt contains the
permanent IP address of the
XMTS. This tool is a
convenient way to edit the file.
However, when changing only a
few lines such as the XMTS IP
address, any text editor will
work.

WMTSConfig

XMTS

Used to assign a temporary IP
address to the XMTS and to
download files to the XMTS.
Specifically it must be used to
download the compiled version
of the Regtree.txt file to the
XMTS. This is primarily used
during initial setup.

Vyyo Configuration Tool

XMTS MIB
database

This is a standalone JAVA
based tool that can be
accessed from the NMS. It is
used to modify and configure
many XMTS parameters. At
present it is the preferred tool
used to configure the XMTS
operating parameters for an
E1/T1 link.

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Configuration Overview – p. 27

Tool

Configured

File or

Device

Description

NMS (Castlerock)

XMTS or
Modem MIB
values
(Typically for
viewing only.)

A general purpose Network
Management System for
operating the network; also
used to launch the Vyyo
Configuration tool to configure
and change XMTS parameters.

Any ASCII text editor, e.g.,
Notepad

CM.SRC

Used with ipLease (the DHCP
server) to bind a modem’s MAC
address to its network IP
address and its modem
configuration file (downloaded
during modem initialization) as
well as other network
parameters needed to configure
the modem.

DHCPGen

CM.SRC

Converts the file to a format that
ipLease can use

DHCP Server

modem

Sends the modem its network
IP address and the name of its
modem configuration file as well
as other information needed to
setup IP connectivity.

TOD Server

modem

Used to set the time of day in
the modem and the XMTS

TFTP Server

modem and
XMTS

Used to send the modem
configuration or “boot” file to the
modem during initialization; also
used to load the XMTS
application and configuration
files

Telnet

Modem

Used to set the downstream
frequency that the modem will
scan to listen to the XMTS.
Also used to set the RF offset if
required.

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The Modem Initialization Process – p. 28

Chapter 3. The Modem Initialization

Process

To understand the configuration process, it is useful to understand the
detailed steps the modem goes through during its initialization.

When the modem is first powered up, it must go through a fixed sequence of
steps before it can exchange data with the network. To be successful, this
requires the modem and the XMTS to be configured with various
parameters.

These parameters should be defined in a Network RF Plan and a Network IP
plan set up by your System Engineer. The three Network Servers (TOD,
DHCP, and TFTP) must be installed and operational. The XMTS must be
configured with the correct software and an IP address.

The modem’s RF parameters must also be correctly configured. The modem
must be configured with the correct software and its RF parameters must be
set correctly. When all of this is done, the modem is ready to initialize itself
when placed at the customer’s premise.

Finally, after initialization, the modem’s E1/T1 port must be “bound” (configured
to connect) to the correct E1/T1 port on the XMTS. This step may be done last
or pre-configured before the modem is at the customer’s premise.

The following sections provide an overview of the modem initialization process.

3.1 Modem Initialization Sequence

All modems proceed through the following sequence of steps, each of which
is described in more detail below. The completion of these steps establishes
connectivity at the DOCSIS and IP layers. Connectivity for additional layers,
e.g., E1/T1, may then be established for the V311 and V312 modems. The
steps are:

• Power-On Self Test

• Downstream Synchronization

• Obtain Upstream Parameters

• Ranging

• Establish IP Connectivity

• Establish Time of Day

• Transfer Operational Parameters

• Registration

• Baseline Privacy Initialization

3.1.1 Power-On Self Test

The modem performs a self-check to ensure that its hardware is working
properly.

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The Modem Initialization Process – p. 29

3.1.2 Downstream Synchronization

The modem listens for downstream transmissions from the XMTS (which are
broadcast at frequent intervals for exactly this purpose) according to its pre­configured or default frequency plan. This may be a single fixed frequency
or a sequence of frequencies, depending on the Network RF Plan and/or the
internal programming of the modem.

If the modem is programmed for a single fixed downstream frequency and
fails to receive an XMTS downstream transmission after three attempts it
switches to its additional backup frequencies. See Setting the Modem’s
Downstream Frequency for a description of how to set these parameters.

Synchronization is obtained when the modem locks onto the XMTS
downstream signal and is able to recognize downstream SYNC messages
which are periodically broadcast: these are crucial to calculating the time
slots available for upstream transmission.

3.1.3 Obtaining Upstream Parameters

The modem must now wait to collect all the Upstream Channel Descriptors
(UCDs) for all upstream channels that are connected to the current
downstream channel.

3.1.4 Ranging

The modem then sends a “ranging request” message on one or more of the
Upstream frequencies, corresponding to a UCD, at different power levels in
an attempt to establish communication with the XMTS. Eventually the XMTS
decodes a ranging request from the modem and sends a ranging response.

Ranging is now complete. Whenever the modem needs to send MAC layer
data for IP to the XMTS it sends a “request” to the XMTS. The XMTS
schedules a time slot for the modem and sends a “grant” message back to
the modem that contains all the necessary information telling the modem
when it can transmit data. A similar method is used to send E1 or T1 data
except that the request sets up periodic time slots that the modem uses to
transmit data.

3.1.5 Establish IP Connectivity

The modem uses the “request-grant” (“best effort”) mechanism to send a
standard DHCP request to the Network DHCP server. The server will
recognize the modem via its MAC (Ethernet) address and assign it a
temporary IP address. This response also contains the default gateway and
the IP subnet mask. The IP addresses of the TFTP and ToD servers, and
the name of the modem configuration file are also included. The response
also includes the local time offset from Universal Coordinated Time (UTC).

Once the modem receives this response it sets its IP address to the
designated value and uses the default gateway to talk to devices using its IP
stack.

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The Modem Initialization Process – p. 30

3.1.6 Establish Time of Day

The modem uses the ToD server address(es) just received to send a Time of
Day request to the ToD server(s). This is combined with the time offset
received in the DHCP response to calculate the current local time. The Time
of Day is used by both the modem and the XMTS to timestamp logged
events (accessible via the Network Management System).

3.1.7 Transfer Operational Parameters

The modem then requests the TFTP server to send the configuration ( or
“boot”) file named in step (5) above during the establishment of IP
connectivity. If the boot file specifies a different upstream channel and/or
downstream frequency, the modem must repeat its initial ranging using this
new upstream channel and/or downstream frequency.

3.1.8 Registration

In order to forward traffic into the network the modem must be “registered”
with the XMTS. To register, the modem sends the XMTS its class of service
(also called QoS for Quality of Service) and any other operational
parameters it received in the configuration file as part of a Registration
Request. As part of the registration process the modem calculates Message
Integrity Check (MIC) values using the parameters specified in its
configuration file. This must match the values given for those parameters in
the configuration file itself.

3.1.9 Baseline Privacy Initialization (BPI)

If the modem is enabled to run BPI then encryption and decryption keys are
established. All further data to or from the modem is now encrypted. The
keys have a lifetime and are automatically reset to new values after a
specified period which may be set by the operator using the NMS.

NOTE: BPI is required in order to support E1/T1

www.vyyo.com

Overview of the XMTS and Modem Configuration – p. 31

Chapter 4. Overview of the XMTS and

Modem Configuration

This section provides an overview of the steps and tools necessary to configure
both sides of the communications link (XMTS and modem) required to add a data
modem or the data portion of a new E1/T1 modem to the network. Several
different tools and files are used as described below.

1. Make sure that the three required servers are installed and
operational: DHCP, ToD and TFTP. For details see Chapter 8,
Installing Vyyo Servers for XMTS Operation. The failure of the
modem to establish communication with any of these three servers
will prevent the modem from completing the registration process.

1. Review the Network IP Plan and use it to assign an IP address to the
XMTS, then make it permanent by following the procedure in the section
Setting the XMTS IP Address.

2. Verify that the right software version is loaded into the XMTS as
described in Appendix B. See the “readme” notes in the distribution
software for the version number.

3. Review the RF plan for the network and configure the XMTS
upstream and downstream channels accordingly using the procedures in
Setting the Upstream Channel. It may not be necessary to configure new
upstream and downstream channels when adding a modem; but if
required, the Vyyo Configuration tool can be used to modify these
parameters.

4. Review the RF Plan to find out which downstream frequency(ies) and
upstream channel ID(s) the modem will use to communicate with the
XMTS. Use the WMUConfiguration Editor (wmuConfigFileEditor.exe) to
edit the modem configuration file that will be downloaded to the modem
during the modem initialization sequence to reflect these choices and
other needed parameters (e.g., QoS or Class of Service, Max Number of
CPE, BPI Enable/Disable – required for E1/T1, etc.). If you know in
advance that this modem will be used for an E1/T1 connection then
additional edits may be made at this time as described in Chapter 6,
Configuring a T1 Connection.

NOTE: One modem configuration file may be used for
several modems if the same upstream channel ID and
downstream channel are used by all the modems (i.e.,
same “profile”); thus, this step may not be required every
time a new modem is added to the system.

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Overview of the XMTS and Modem Configuration – p. 32

5. .

NOTE 1: Five T1s per 3.2MHz upstream channel using
16QAM modulation is the hard limit for the current
system. Attempting to configure more T1s on an
upstream channel than it can support will cause the
modem initialization to fail. Consult your system engineer
for advice on the maximum number of modems per
upstream channel ID.

6. Use the appropriate DHCP tool for your system to bind the modem’s
MAC address to its IP address and modem configuration file. If ipLease
is used, edit and compile the CM.SRC file as needed. If Windows 200x
Server Edition is used then set these values using the graphical user
interface. These procedures are described in section 5.2.2, Windows
200x Server Edition: Modifying the DHCP Options

NOTE: this step is ALWAYS required when adding a
modem

7. Use the modem’s Telnet server interface to set the modem to a
permanent downstream frequency as described in Setting the Modem’s
Downstream Frequency. Having a permanent (fixed) downstream
frequency (or set of frequencies) expedites the modem initialization
process since the modem does not have to scan multiple downstream
frequencies to find one being transmitted from the XMTS. This does,
however, require some pre-planning of the network to pre-allocate
different downstream frequencies to specific modems. Ask your System
Engineer for details.

NOTE: this step is ALWAYS required when adding a
modem with a fixed permanent downstream frequency

8. If a T1 connection is being setup then use the procedures in
Configuring a T1 Connection. Configure the XMTS upstream channel ID
for E1/T1 operation and bind the XMTS upstream channel ID to the
modem E1/T1 interface and to bind the modem’s E1/T1 interface to a
particular port on the E1/T1 card plugged into the XMTS (use the Vyyo
Configuration tool for this procedure.)

NOTE: the Vyyo Configuration tool binding operation will
ALWAYS be required when adding a T1 modem. This
step can be done after the modem is installed at the
customer’s site.

9. Install the modem at the customer site and connect it to the RF
equipment, provide power to the modem and turn it on.

NOTE: This step is ALWAYS required when adding a
modem

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Overview of the XMTS and Modem Configuration – p. 33

10. If the modem is already on and its modem configuration file has been
changed (to bind the E1/T1 ports), then the modem must be rebooted;
although this happens automatically when the DHCP lease expires, it is
more efficient to simply power cycle the modem (unplug and replug the
power connector or switch the modem OFF then ON) to restart the
modem initialization sequence.

11. If desired, connect the modem’s internal Telnet server to a local
computer system to observe the process on site and verify that the
modem is working correctly.

The POWER and STATUS LEDs should be lit and the LAN & USB, and
RF Link LEDs should be flashing (one at a time) with activity:

12.

If the Power, Status, RF Link, and LAN/USB LEDs are lit, then the modem
has been successfully installed. If one or all of the lights remains unlit, see
Chapter 9, Maintenance and Troubleshooting

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Adding a Modem to the XMTS – p. 34

Chapter 5. Adding a Modem to the

XMTS

NOTE: These instructions are required for all modems.
If you are adding a T1 modem then you must also
perform the step in Chapter 6, Configuring a T1
Connection to finish the installation.

Use the instructions in this chapter to setup a data modem or the data portion of
an E1/T1 modem and configure the XMTS to communicate with it over IP.

This chapter covers the following topics:

1. Editing the Modem Configuration File describes the steps necessary
to setup the modem configuration file.

System Configuration Guide

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Adding a Modem to the XMTS – p. 35

2. DHCP Settings for the Modem explains how to set (bind) the
modem’s IP address and configuration file using either ipLease or the
Windows 200x Server Edition DHCP Server.

3. Configuring the XMTS describes how to configure the XMTS
upstream, downstream and QoS parameters. At this time instructions are
provided for using the Vyyo Configuration tool. Older systems use the
Castlerock NMS SNMPc Version 5 Synoptic display interface to change
XMTS parameters. Equivalent instructions for performing these changes
are shown in Configuring the XMTS

4. Setting the Modem’s Downstream FrequencySetting the Modem’s
Downstream Frequency describes how to set the modem downstream
initial receive frequency via the modem’s internal Telnet server.

5. Maintenance and Troubleshooting describes how to use the
modem’s internal Telnet server to view the modem’s downstream and
upstream status (current values) and verify correct operation.

5.1 Editing the Modem Configuration File

You will need to edit the modem configuration file to set the XMTS downstream
frequency, upstream channel ID, concatenation and fragmentation capabilities, and
QoS. This file will be downloaded to the modem during its initialization sequence.

NOTE: A separate modem configuration file is required
for each set of upstream and downstream channels. Any
modem may use any configuration file and the same file
may be used by many modems; typically only five T1
modems are assigned to a single 3.2MHz upstream
channel.

5.1.1 Setting the Upstream Channel

Open the WMUconfigFileEditor to edit the modem configuration file to set the
Downstream Frequency and Upstream Channel ID.

Note: If using ipLease, the modem configuration file is
bound to the modem’s MAC address in the CM.SRC file.
If using Windows 200x Server Edition bring up the DHCP
Administrative Tool to find the configuration file to the
mode:
Programs->Administrative Tools->DHCP
For more detailed information, see section 5.2.2,

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 36

Windows 200x Server Edition: Modifying the DHCP
Options

From the main screen shown below select “General Parameters” and then
choose “Upstream Channel ID”.

Right-click on “Upstream Channel ID” and select “MODIFY” to display the popup
window in which you may set the value of the Upstream Channel ID.

Note: The detailed parameters for each upstream
channel must be set in accordance (see Setting the
Upstream Channel)with the overall Network RF Plan –
contact your system engineer for assistance. The
Channel ID is the identifier for the physical RF port on the
RF cards plugged into the rear of the XMTS. The ports
are numbered as follows:

Channel ID = card slot number + port number

Where the card slot number is zero for the leftmost
upstream card (as viewed from the front of the XMTS)
and increases by the ifIndex of the card times eight for
each additional card. The if index of the card can be
found in the ifTable. Please contact Vyyo for the exact

details of this configuration. Typically, the ifIndex

increases from left to right by 1 for each card, from 0 to n,
where n is the rightmost card. The ports are numbered
from bottom to top on each card starting with one. Thus,
the first card has ports numbered from 1 to 6 (since the
Hex upstream card only has six ports even though a
maximum of 8 are allowed) and the second card has its
ports numbered from 9 to 14, etc. Contact Vyyo for
Details.

NOTE 2: See Setting the Upstream Channel to set the
receive frequency of an upstream channel.

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 37

Figure 5-1: Setting Upstream Channel ID

System Configuration Guide

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Adding a Modem to the XMTS – p. 38

5.1.2 Setting the Downstream Frequency

In the following example, the Downstream Frequency is changed to 743 MHz.

1. From the main screen shown below select “General Parameters” and
then choose “Downstream Frequency”.

2. Right-click on “Downstream Frequency” and select “MODIFY” to
display the popup window in which you may set the value of the
downstream frequency in Hertz (note the six zeroes).

NOTE: This value will be specified by your system
engineer.

Figure 5-2 Setting Downstream Frequency

System Configuration Guide

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Adding a Modem to the XMTS – p. 39

5.1.3 Setting Concatenation and Fragmentation Capabilities

1. Select “Modem Capabilities” and enable “Concatenation” and
“Fragmentation” by setting them to “1” (select each one then right-click to
view the “Set Value” dialog box, enter the value “1” then click “OK”).

NOTE: These should always be used unless specified
otherwise by your system engineer.

Figure 5-3. Setting the Concatenation Value

Figure 5-4. Setting the Fragmentation Value

System Configuration Guide

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Adding a Modem to the XMTS – p. 40

5.1.4 Setting Upstream QoS (Class of Service) for IP Data

1. Select “Class of Service Parameters”

2. Right-click on “Maximum Upstream Rate” to display a selection of
QoS profiles.

3. Choose the profile that is appropriate for the installation being done.
Your system engineer can provide assistance based on the Network RF
& IP Plan.

4. Select a profile in the left side of the popup window to display its
corresponding parameters on the right side.

Figure 5-5. Setting Upstream QoS

System Configuration Guide

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Adding a Modem to the XMTS – p. 41

5.1.5 Setting Additional Downstream and Upstream Channels

Use the “Vendor Specific Parameters” option to set additional downstream
frequencies and upstream channels. Your system engineer should tell you if this
is necessary. First enter the Frequency of the Additional Downstream Channel in
Hertz and then enter the associated upstream channel ID (ID of additional
Upstream channels). To add more downstream and upstream frequencies right
click on the “Vendor Specific Parameters” option and select “Duplicate” to bring
up another screen and enter the desired values.

A Downstream Scan Plan value of ‘9’ indicates that the downstream channel is
set to a permanent fixed frequency (the advantage is that the modem initializes
faster and doesn’t interfere unnecessarily with other traffic on the network).

Figure 5-6: Using Vendor Specific Parameters to set additional DS/US pairs

System Configuration Guide

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Adding a Modem to the XMTS – p. 42

5.1.6 Setting the Maximum Number of CPEs

It is advisable to set the maximum number of CPEs at this time by selecting and entering
the desired value on the following screen:

Figure 5-7: Setting the maximum number of CPEs

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 43

5.2 DHCP Settings for the Modem

The DHCP Server provides the IP address for the modem and also specifies
which modem configuration file will be downloaded to the modem. In the
following two sections, instructions are provided for setting up two different
DHCP Servers: the ipLease DHCP Server and the Windows 200x Server Edition
DHCP Server. Either of these (or any other) DHCP server may be used (but not
multiple ones at the same time).

5.2.1 IpLease DHCP Server: Editing and running the CM.SRC File

Note: This section applies only if your configuration uses
ipLease™ (purchased separately) as the DHCP server.

Bind the modem MAC Address to its IP Address and modem configuration file by
editing the CM.SRC file.

1. Locate the CM.SRC file – it is usually in the DHCP tool directory. In
this example we are using ipLease as our DHCP server.

2. Open the CM.SRC file using any text editor.

Tip: Use Windows Notepad to edit this file.

Figure 5-8. Location of CM.SRC file

System Configuration Guide

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Adding a Modem to the XMTS – p. 44

3. This section of CM.SRC shows IP addresses of all the servers and
their associated parameters. See the comments on each line of the file
shown for details. Your system engineer can tell you how to configure
these addresses.

Figure 5-9: Server Configuration Info on CM.SRC file

System Configuration Guide

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Adding a Modem to the XMTS – p. 45

4. In the [Hosts] section of CM.SRC shown below, four modems are
defined. You may add additional modems here. If they are not defined
here they will be ignored in the next section.

Figure 5-10. CM.SRC File Format

5. Add the configuration parameters for each modem as shown below.
Note that even though each modem has a unique bpBootFile filename
this is not typical. This file is the modem’s configuration file. The same
modem configuration file may be used for many modems if they use the
same upstream and downstream channels.

NOTE: a line that starts with a semicolon “;” is interpreted
as a comment and therefore is ignored by the compiler

Four modems are defined and
named in the [Hosts] section of
this file.

System Configuration Guide

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Adding a Modem to the XMTS – p. 46

Each modem name is defined in square brackets and
followed by its MAC address “Chaddr”, its
“StaticIPAddress” and it “bpBootFile” name (this is
also known as its modem configuration file.)

Figure 5-11. Defining and Naming Installed Modems

NOTE: This file (CM.SRC) must be compiled by
executing the command “dhcpgen cm” from the directory
in which the file is located. Before compilation, the DHCP
Server must be shut down. After compilation the
command “dhcpsvr” must be executed from the same
directory to read the compiled files and restart the
ipLease DHCP server.

6. If the ipLease DHCP server is running it must be shutdown in order
to reconfigure the IP addresses given in the CM.SRC file. Simply click
on the “SHUTDOWN” button in the upper right pane of the ipLease
application window.

System Configuration Guide

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Adding a Modem to the XMTS – p. 47

Figure 5-12: DHCP Server Shutdown in ipLease™

Click this button

System Configuration Guide

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Adding a Modem to the XMTS – p. 48

7. Now change directories to the ipLease directory (in a DOS window)
and type “dhcpgen cm” to generate the machine-readable files for the
ipLease DHCP server. The output should indicate “successful” as
shown below. If not, check to make sure you have shutdown the iplease
server or that you have not mistyped something in the CM.SRC file.

8. Restart the ipLease server. After compilation the command
“dhcpsvr” must be executed from the same directory to read the
compiled files and restart the ipLease DHCP server.

5.2.2 Windows 200x Server Edition: Modifying the DHCP
Options

Note: This section applies only if your configuration uses
Microsoft Windows 200x Server Edition as the DHCP
server.

Bind the modem MAC Address to its IP Address and modem configuration file by
entering the appropriate information in popup windows. First bring up the DHCP
Administrative Tool by clicking on the “Start” button on the main windows screen
then choosing “Administrative Tools” and finally “DHCP”. See the following
screen shots:

1. Locate and open the DHCP program by using:
Start->Programs->Administrative Tools->DHCP

The DHCP window should open on the desktop as shown in Figure 5-14:
Expand “Reservations”

System Configuration Guide

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Adding a Modem to the XMTS – p. 49

Figure 5-13: Navigate to the DHCP program

2. Expand the tree in the left window pane and expand “Reservations”
to view all the modems to which DHCP is leasing IP addresses

System Configuration Guide

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Adding a Modem to the XMTS – p. 50

Figure 5-14: Expand “Reservations”

3. Now click “New Reservation” on the “Action” menu (or right-click on
“Reservations” and select “New Reservation”)

System Configuration Guide

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Adding a Modem to the XMTS – p. 51

Figure 5-15: Make a “New Reservation” using DHCP

System Configuration Guide

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Adding a Modem to the XMTS – p. 52

4. Enter the required information (see your system engineer for details)
and click the “Add” button.

NOTE: Make sure to select the “DHCP only” radio button
under “Supported Types”.

Figure 5-16: Enter the information for the new reservation

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 53

5. Now select the new reservation and right-click on the newly added
modem then select “Configure Options” to choose the modem
configuration file that will be downloaded to this modem. Observe that
five Options are shown in the right pane of the main window. These are
the default values.:

Figure 5-17: Navigate to the “Configure Options” action

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 54

6. Select the “General” tab in the popup window, scroll down to item
“067” and check (and select) the “Bootfile Name” checkbox to enter or
change the “boot” or modem configuration file name.

NOTE: Any of the other options may be changed using
this same procedure. These values must match the
physical setup of the network (as per the Network IP and
Network RF plans) to make the system work. If this
DHCP server is already in operation the default values
should be correct.

Figure 5-18: Enter the “boot” file name

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 55

TIP: You may verify that the modem properties have
been set correctly. Select the modem and right-click to
display the action popup window; then select “Properties”
to display and allow you to verify the modem information
entered previously.

Figure 5-19: Navigate to the Properties display for the selected modem

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 56

Tip: The modem information is displayed in this popup
window.

Figure 5-20: View the Properties for the selected modem

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 57

5.3 Configuring the XMTS

NOTE: Before you can perform this procedure you must
have previously edited the regtree.txt file, compiled it and
downloaded it to the XMTS to set its IP address. See
Setting the XMTS IP Address.

This section assumes that you have previously installed
NMS Version 5.0. See Installing and Uninstalling the

NMS for instructions.

The upstream and downstream channels of the XMTS must be configured before
a modem can communicate with the XMTS.

5.3.1 Setting the XMTS Upstream Parameters

1. Open the Network Management System and double-click on the XMTS
icon to bring up the Network display of the XMTS front panel:

Figure 5-21: Network display of the XMTS

Double click this icon

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 58

2. Select the Configuration tool item from the Vyyo menu.

Figure 5-22: Selecting the Vyyo Configuration Tool from the WMTS Synoptic

Display

3.

4. Now select the Upstream Channel ID you wish to configure and right­click the mouse. The Channel ID refers to the physical port on the
upstream RF card that you are configuring. (This connection is described
previously in section to be referenced.

In this example upstream channel 1 is selected and all of its parameters are
displayed in the right pane of the window.

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 59

You may change the frequency the modem is told by the XMTS to transmit
on (labeled “Tx Frequency”), the receive frequency that the upstream RF
port expects to receive the modem’s signal on (this is labeled “Rx
frequency”), its bandwidth, modulation, and the associated downstream
channels, antenna diversity and admin status as needed.

These parameters are transmitted by the XMTS as part of the upstream
channel descriptor (UCD) sent during the DOCSIS modem initialization
process. These parameters should be determined by the system engineer
responsible for the RF planning and are outside the scope of this manual.

Figure 5-23: Selecting and Setting Upstream Channel 1 Parameters

5.

Set this to ‘up” to operate this
channel or “down” to turn it off

The modem
transmits on
this frequency

This XMTS upstream channel
will receive on this frequency

These are the XMTS
downstream channels
associated with this
XMTS upstream channel

Check this box unless your System
Engineer indicates otherwise

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 60

6.

NOTE: “Best effort channel” or “CIR channel” are typically
used for a data-only modem. An “E1 channel” must be
used when the modem supports E1/T1 connections and
data. These settings correspond to the desired SLA
(Service Level Agreement.)

1. The “Tx backoff” settings control the scheduling algorithms used in
the upstream channel. The default values should be used unless your
system engineer has indicated otherwise.

2. Ensure that the “Optimize channel parameters” box is checked. This
causes the XMTS to maximize the efficiency of the channel usage for the
different types of modems assigned to it.

3. Click on the Update button at the bottom of the screen to save the
new settings.

7.

Figure 5-24: Updating the Upstream Channel Settings

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 61

8. The following popup window will be displayed if the operation was
successful. Click “OK” to proceed.

9. Figure 5-25: Update successful

Should be set to WAN

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 62

10. You have now completed configuring the upstream channel. For a
summary of all of the upstream channels click on the “Upstream” item in
the left pane of the window.

Figure 5-26: Viewing the XMTS Upstream Channels Summary

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 63

5.3.2 Setting the XMTS Downstream Parameters

1. If you have already opened the Vyyo Configuration Too then proceed
to step 3, otherwise open the Network Management System and double­click on the XMTS icon to bring up the Network display of the XMTS front
panel:

Figure 5-27: Network display of the XMTS

Double click this icon

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 64

2. Select the Configuration tool item in the Vyyo menu.

Figure 5-28: Selecting the Vyyo Configuration Tool from the WMTS Synoptic

Display

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 65

3.

4. Select the XMTS Downstream Channel you wish to configure from
the left side of the window. In this example downstream channel 1 is
selected and all of its parameters are displayed in the right pane of the
window.

Bandwidth, modulation, and other parameters can be changed. Typically the
default values should be used with “Optimize channel parameters” unless
your system engineer indicates otherwise.

These parameters should be determined by the system engineer responsible
for the RF planning and are outside the scope of this manual.

5.
Figure 5-29: Select the downstream channel and change its parameters

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 66

6. To permanently save the configuration to the XMTS click on the

“Update” button. Press the “OK” button on the popup window to confirm
the update.

7.
Figure 5-30: Updating the XMTS downstream parameters

8. If the update was successful this dialog box will appear. Click OK to
continue.

Figure 5-31: Update successful

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 67

9. You have now completed configuring the downstream channel. For a
summary of all the downstream channels click on the “Downstream” item
in the left pane of the window.

Figure 5-32: Viewing the XMTS Downstream Channels Summary

5.4 Setting the Modem’s Downstream Frequency

This section provides details on how to set the downstream frequency that the
modem listens on to begin its initialization sequence. Setting this value greatly
reduces the time it takes for a modem to complete its initialization sequence.

NOTE: the downstream frequency that is set using this
technique will not be saved in the modem until the
modem completes registration.

1. Connect a computer to the RJ45 modem connector using a standard RJ45 patch
cable.

2. Make sure your computer's IP address is set to 192.168.100.xxx, where "xxx" is
any value from 2 to 254. The subnet mask should be 255.255.255.0. You may
use any utility software on your computer that allows you to set these values.

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 68

3. All modems include a Telnet server with a fixed IP address of 192.168.100.1.
Follow the screens below to set the modem Downstream Frequency and view
the Downstream and Upstream settings.

The modem Telnet server has multiple levels of access privileges:

User – the standard level which permits viewing information

Operator – permits changing the downstream frequency

Note: The modem will accept typed settings while
simultaneously displaying and scrolling though feedback
information or messages. This behavior does not affect
setup. At present there is no procedure to turn off the
streaming messages issued by the modem.

4. Enter the password (obtained from your system engineer or a Vyyo
representative) on this screen.

Figure 5-33: Log In to the Vyyo WMU Telnet Server

Enter the user password here
when prompted.

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 69

5. This screen will be displayed after the password is correctly entered:

Figure 5-34: Successful Telnet Login

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 70

6. Type “su operator”, then press return. Now enter the operator’s password
(obtain this from your system engineer or a Vyyo representative) to access the
DOCSIS control commands.

Note: Return to user mode from operator mode at any
time by typing “su user” – no password is required to
return to user mode.

Figure 5-35: Switching to the Operator's Permission Level

Enter the operator password here
when prompted

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 71

7. Change to the DOCSIS Control subdirectory by typing “cd docsis”:

Figure 5-36: The “cd docsis” Command

Type “cd docsis” here

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 72

8. Type “goto_ds xxxxxxxxx” to set the Downstream Frequency, where “xxxxxxxxx”
is the frequency in Hertz.

NOTE: Your system engineer should provide you with
this value. This will now be the permanent fixed
frequency at which the modem will listen for a broadcast
from the XMTS. After a maximum of 30 seconds, the

modem LEDs should light up and remain lit. This
indicates that the modem has locked on to the

Downstream channel, is operating on the appropriate
Upstream channel, and is authorized for operation on the
XMTS.

Figure 5-37: Setting the Frequency to 743 Mhz (or 743000000, i.e., six zeroes)

Enter the frequency here

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 73

9. To view the “operator” commands type “?”. The following figure shows the
“operator” commands.

NOTE: to get help on a particular command type “help
<command>”

Figure 5-38: Executing the “?” command to view the Operator commands

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 74

5.5 Verifying the Modem Downstream and Upstream
Status

1. View the downstream status after the modem has successfully
completed registration by typing “dsdiag” to verify that the change took
effect and the modem is operating correctly: “QAM = LOCKED” and
“FEC = LOCKED” should appear as the last two lines. You must have
“operator” access rights to do this.

NOTE: this will only happen if the modem is in a place
where it can establish RF connectivity to the XMTS, e.g.,
hooked up to the cable plant.

Figure 5-39: Viewing the Modem Downstream Status

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 75

2. View the Upstream Status after the modem has successfully
completed registration by typing “usdiag” to verify that the modem is
operating correctly. The parameters should be stable. You must have
“operator” access to do this.

Figure 5-40: Viewing the Modem Upstream Status

The modem has now established IP connectivity with the XMTS.

Type “usdiag” here

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 76

5.6 Using an HTTP Connection to View Modem
Operation

You may also view this information using an HTTP browser such as Internet
Explorer. All modems include an HTTP server at the same address as the
Telnet server. If the modem does not yet have an IP address assigned and
operating (i.e., completed registration), set your browser to browse the URL
http://192.168.100.1/ to get the status information.

Note: In order to use this facility, you must be connected
to the same LAN to which the modem is connected. This
would be 192.168.0.xxx with a subnet mask of

255.255.255.0 in the initial case.

5.6.1 Viewing the internal modem HTML pages:

1. Open the Web Browser application that is installed on your system.

Figure 5-41: Opening a Browser Window to view modem activity

10. Type http://192.168.100.1/ into the Address field at the top of the
Browser window and press “Enter”.

Figure 5-42: Entering the modem IP address into the Browser Window

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 77

11. Obtain the Operator user name and password from your System
Administrator or an authorized Vyyo representative. Enter the user name
and password in the appropriate fields, and click the OK button. The

Vyyo Connection page opens.

Figure 5-43: Entering the modem user name and password

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 78

12. Each informational page consists of two sections: A Menu box at the
left, which enables you to navigate between pages, and a Data area at
the right, which shows information specific to the system.

5.6.2 Viewing the Connection Page

To view the Connection page click the “Connection” option on the Menu box.

Figure 5-44: Selecting the Browser Connection option

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 79

The browser displays the Connection page which has five areas of information:

• Startup Procedure

• Downstream Channel

• Upstream Channel

• Assigned IP Address of the Modem

• Current System Time from the ToD Server.

Figure 5-45: Viewing the Browser Connection page

5.6.3 Viewing the Software Page

To view the Software page click the Software option on the Menu box.

Figure 5-46: Selecting the Browser Software option

System Configuration Guide

www.vyyo.com

Adding a Modem to the XMTS – p. 80

The Software page displays modem Information and Status data.

Figure 5-47: Viewing the Browser Software page

5.6.4 Viewing the Security Page

To view the Security page click the Security option on the Menu box.

Figure 5-48: Selecting the Browser Status option

The browser displays the Security page.

You use the Security page if you wish to change your login password. To change
your Password, enter a new Password in the Password field, and enter it again
for verification in the Re-Enter Password field.

If you want to return to the factory default password, select the Yes option and
click Apply.

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 81

Chapter 6. Configuring a T1

Connection

NOTE: the data connection for the E1/T1 modem must
be setup as previously described in Chapter 5, Adding a
Modem to the XMTS

Three separate tools are necessary to configure a T1 connection:

The WMUconfigFileEditor is used to set the modem QoS (also referred to as Class of
Service) in the modem configuration file downloaded during the modem initialization
phase.

The NMS (Castlerock SNMPc) tool is the Network Management System used to monitor
and reconfigure the network on an ongoing basis. It accesses a MIB database stored in
the XMTS as well as a local version residing in the controlling computer. It is used here
to set specific XMTS parameters by launching the Vyyo Configuration tool.

The Java™-based Vyyo Configuration Tool is necessary to set the E1/T1 parameters
of the XMTS when adding a new modem to the network.

These tools may be used as directed in any order. They are described in the
following sequence:

1. The WMUconfigFileEditor is used to modify the modem
configuration file for T1 operation by adding a second Class of Service
(the first Class of Service was used for the data only connection).
Instructions are also given for setting/checking the upstream and
downstream parameters (which may have been previously set when
configuring the modem for data only operation).

2. The NMS tool is used to launch the Vyyo Configuration Tool to set the
XMTS upstream parameters, specifically the QoS (Quality of Service)
which is another name for the Class of Service. For older systems,
Instructions for using the Synoptics interface are given in Chapter 10,
Synoptics Display for XMTS Configuration.

3. The Vyyo Configuration Tool is required to bind the T1 ports of the
modem to the T1 ports of the XMTS.

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 82

6.1 Configure the Modem for T1 Operation

In this section instructions are provided for using the WMUconfigFile Editor to
edit the modem configuration file which will be downloaded to the modem. When
the edits on the following pages are complete, copy or move the modem
configuration file to the directory being used by the TFTP Server (usually this will
be something like “C:\vyyo\mic”). You may also save it directly to the TFTP
directory using the “Save” menu option of the WMUconfigFile Editor.

NOTE: This file name must be bound to this modem’s
MAC address by using the appropriate DHCP tool for the
particular system being used (Edit the CM.SRC file if
ipLease is being used. If the Windows 200x Server
Edition DHCP Administrative tool is being used then set
the “bpBootfile” name to the name of the modem’s
configuration file).

1. Set the Downstream Frequency by selecting “General Parameters”
then double clicking on the “Downstream Frequency (Hz)” parameter as
shown. This is the frequency which the modem will use to receive
(downstream) transmissions from the XMTS. This is the same procedure
described in Setting the Downstream Frequency and is repeated here for
convenience.

Figure 6-1: Set the Downstream Frequency Value

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 83

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 84

2. Set the upstream channel ID using the same procedure. This is the
channel ID the modem will use to transmit upstream data to the XMTS.
The channel ID parameters are sent by the XMTS when it broadcasts
UCDs during the Obtaining Upstream Parameters phase (immediately
after the Downstream Synchronization phase) of the modem initialization
prcocess. This is the same procedure described in Setting the XMTS
Upstream Parameters and is repeated here for convenience.

Figure 6-2. Set the Upstream Channel ID

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 85

3. Create a second Class of Service (aka. QoS or Service ID). Select
and right-click “Class of Service”, then select the “Duplicate” option. This
is necessary to add the “Voice” (or “WAN”) service for the T1 connection.

NOTE: the first Class of Service was created previously
for the data only connection. This second Class of
Service is specifically for the T1 connection so make sure
it is setup that way. The same upstream channel is used
for both.

Figure 6-3. Duplicating the QoS Value

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 86

4. Observe that a second Class of Service has been added in the left
column of the window.

5. Select this second Class of Service, then right-click on the Maximum
Upstream Rate parameter and select “Modify” from the popup menu.

Figure 6-4. Modifying the Upstream Bit Rate Value

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 87

6. Now select “WAN Service/2048k” from the “Parameter” pane of the
popup window.

Figure 6-5. Choosing an Upstream Bit Rate Parameter

7. The corresponding parameters will appear on the right side of the
popup window.

System Configuration Guide

www.vyyo.com

Configuring a T1 Connection – p. 88

8. Now select “WAN Service/2048K” in the left pane of the popup
window and then Click the “OK” button.

Figure 6-6. Choose Profile Setting

9. The display will return to the main window showing the new values set
above, as shown in Figure 6-7.

Figure 6-7.

www.vyyo.com

XMTS US Port Mapping – p. 89

10. Select “Modem Capabilities” and turn on “Concatenation” and
“Fragmentation” by setting them to “1” (select each one then right-click to
popup the “Set Value” window) and clicking the “OK” button.

Figure 6-8. Setting Concatenation Value

Figure 6-9. Setting Fragmentation Value

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 90

11. The display will return to the main window. The modem configuration
file is now configured for T1 operation. You should save this file. This
filename will be bound to the modem MAC address using the DHCP
Server tool as described in IpLease DHCP Server: Editing and running
the CM.SRC File. The same modem configuration file may be used for
several modems provided the Network RF Plan allows for this; see your
system engineer for details.

Figure 6-10. Main WMU Configuration File Editor Window

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 91

6.2 Adding the T1 modem to the XMTS T1 Interface and
Assign Port(s)

NOTE: The XMTS Upstream and Downstream
parameters must be configured prior to performing this
procedure. In particular the Upstream “Voice Service
Type” must be set to “WAN” for an E1/T1 channel. See
Configuring a T1 Connection.

1. Open the Network Management System (NMS) tool and double-click
on the WMTS icon to bring up the the WMTS front panel.

Figure 6-11: NMS View of Network Devices

Double-click this icon

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 92

2. Select the Configuration Tool item from the Vyyo menu to start the
Vyyo Configration Tool from the NMS

Figure 6-12: Selecting the Vyyo Configuration Tool

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 93

3. When the following window appears you will need to expand the
“XMTS_xxxx” (where xxxx is the xmts’s IP address) and then expand
“Modems” to obtain this more informative version of the window If the
modem is already connected, the tool will detect it automatically and it will
appear in the list under “Modems->E1/T1” or “Modems->Data” by its
MAC address; in this case skip to Step 4. Otherwise you must add the
modem to the list by continuing this procedure:

Figure 6-13: Vyyo Configuration Tool main screen

4. Select the “Insert” menu option and choose “Modem”

Figure 6-14: Insert Modem

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 94

5. A popup window will appear to allow you to enter the modem type.
From the pulldown menu select “E1/T1 Modem”.

Figure 6-15: Select new modem type

A new modem icon will appear on the navigation tree window pane

Figure 6-16: New modem icon

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 95

6. Enter the last three bytes of the Vyyo modem MAC address and press
the “Update” button.

Note: The first six bytes of the Vyyo MAC address (the
vendor ID) are displayed both in the navigation tree on
the left and in the data entry window on the right.

Figure 6-17: Vyyo Modem Configuration Information

7. A popup window will confirm the update. Press “OK”.

Figure 6-18: Confirm update of new modem

Enter the last part of
the Vyyo modem
MAC address here

Press the update button
after entering the MAC
address

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 96

8. Now you must add the E1/T1 configuration for the modem by clicking
on the “Add” button.

NOTE: Do this process once for the V311 modems and
twice for the V312 modems (the latter have two E1/T1
ports).

NOTE: the modem does not need to be active on the
network to perform this procedure as this is strictly a
configuration procedure. However, the modem will not
appear under its IP address unless it is already on the
network as a data modem, i.e., the DOCSIS IP portion of
the initialization has been successful.

Figure 6-19: Adding a new E1/T1 configuration for a modem

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 97

9. When this screen appears, select the desired port on the XMTS E1/T1
interface card using the drop-down menu and press the “Update” button.
This binds the T1 port on the modem to its corresponding T1 port on the
XMTS E1/T1 interface card (inserted into the rear of the XMTS chassis).
Other parameters may be changed fromt the defaults shown in this
screenshot to create a “fractional T1” connection.

Figure 6-20: Updating the Port Data

Select the port – all
assigned ports will
appear (only 1 in
this example)

Click the “Update” button

To make this a fractional T1
connection select the specific T1
slots you wish to use

Select the desired XMTS port
using the pull down menu

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 98

10. Enable the newly added modem using the pull down menu

Figure 6-21: Enabling the newly added modem

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 99

11. Now click on the “Update” button and press “OK” when the
confirmation popup window appears.

Figure 6-22: Updating the system for the new modem

Vyyo Installation Guide

www.vyyo.com

Configuring a T1 Connection – p. 100

12. This screen will show the new modem and its corresponding XMTS
port. It can also be used to change the assigned modem port if the
modem is already connected to an E1/T1 port on the XMTS.

Figure 6-23: Viewing the new modem and its corresponding E1/T1 port