Perle 833IS User manual

833IS User Guide
5500116-10

Copyrights Copyright 1995 -2002, PerleSystems Limited and its suppliers.
Cisco and Cisco IOS are registered trademarks of Cisco Systems, Incorporated.
IBM is the registered trademark of International Business Machines Corporation.
Microsoft, MS-DOS and Windows are registered trademarks of Microsoft Corporation.
Novell and NetWare are registered trademarks of Novell, Incorporated.
All other trademarks mentioned in this document are the property of their respective owners.
Mention of third party programs is for information purposes only constitutes neither and
endorsement nor a recommendation. Perle Systems Limited assumes no responsibility with
regard to the performance of these products.
IMPORTANT: Please review the Software License and Limited Warranty before using the
software.
Important Safety Notice
This product is made to high safety standards. For safe operation, both feature card slots are
to be covered. The thumbscrews on the feature cards should be tightened with screwdriver.
This is to prevent the operators from access to the internals of the unit. Access should be
gained only by authorized personnel that have been instructed about the proper procedures
and precautions to follow when servicing the unit.

FCC/DOC Radio Frequency Interference Statement
Note This equipment has been tested and found to comply with the limits for a Class A Digital
Device, pursuant to Part 15 of the FCC rules and to DOC Radio Interference Regulations,
C.R.C., c1374. These limits are designed to provide reasonable protection against harmful
interference when the equipment is used in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own
expense.
FCC/DOC compliance requires that all I/O cables used with Perle products be constructed
using shielded cable, metal-shelled connectors and conductive back-shells.
This equipment is approved in accordance with DIN IEC 380/VDE 0806/08.81. If this unit is
installed as an office machine, the installation must conform with the above standard.
Equipment must be used with an appropriately approved power supply cordset.
Caution Changes or modifications to a Perle product not expressly approved by Perle Systems
Limited may void the users authority to operate the equipment.

European Community (EC) Mark of Conformity
This product is in conformity with the protection requirements of EC Council Directive 89/
336/EEC on the approximation of the laws of the Member States relating to electromagnetic
compatibility. Perle cannot accept responsibility for any failure to satisfy the protection
requirements resulting from non-recommended modification of the product.

INDUSTRY CANADA REQUIREMENTS.
“NOTICE: The Industry Canada (formerly Canadian Department of Communications) label
identifies certified equipment. This certification means that the equipment meets certain
telecommunications network protective, operational and safety requirements. The
Department does not guarantee the equipment will operate to the user’s satisfaction.”
Before installing this equipment, users should ensure that it is permissible to be connected to
the facilities of the local telecommunications company. The equipment must also be installed
using an acceptable method of connection. In some cases, the company’s inside wiring
associated with a single line individual services may be extended by means of a certified
connector assembly (telephone extension cord). The customer should be aware that
compliance with the above conditions may not prevent degradation of service in some
situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance
facility designated by the supplier. Any repairs or alterations made by the user to this
equipment, or equipment malfunctions, may give the telecommunications company causes to
request the user to disconnect the equipment.
“CAUTION: Users should not attempt to make such connections themselves, but should
contact the appropriate electric inspection authority, or electrician, as appropriate.”
If you experience trouble with this equipment, please contact the Perle Technical Assistance
Center at the following address for information about obtaining service;
Perle Systems Limited
60 Renfrew Drive
Markham, Ontario
L3R 0E1
1-800-33 PERLE
All repairs should only be performed by Perle Systems Limited or an authorized agent of
Perle .

FEDERAL COMMUNICATIONS COMMISSION (FCC) REQUIREMENTS.
This product complies with Part 68 of the FCC rules. If requested, you must provide the
telephone company with the FCC registration number, make and the model number of this
device. This information can be found on the product label affixed to the back of the unit.
This equipment is designed to be connected to the telephone network or premises wiring using
a compatible modular jack which is part 68 compliant.
This equipment is not intended to be used on public coin phone service or be connected to
party line service.
If this equipment malfunctions, it may cause harm to the telephone network. In such an event,
the telephone company may request that youdisconnect theequipment fromthe network until
the problem is corrected. The may also notify you in advance that temporary discontinuance
of service may be required.If advance notice isn't practical, the telephone company will notify
the customer as soon as possible. Also, you will be advised of your right to file a complaint
with the FCC if you believe it is necessary.
The telephone company may make changes in its facilities, equipment, operations or
procedures that could affect the operation of the equipment. If this happens, the telephone
company will provide advance notice in order for you to make the necessary modification to
maintain uninterrupted service.
If you experienced trouble with this equipment, please contact the Perle Technical Assistance
Center at the following address for information about obtaining service;
Perle Systems Limited
60 Renfrew Drive
Markham, Ontario
L3R 0E1
1-800-33 PERLE
All repairs should only be performed by Perle Systems Limited or an authorized agent of
Perle .
When ordering service from the telephone company, you may need to provide the following
information;
Facility Interface Codes (FIC): 02IS5
Service Order Code (SOC): 6.0Y
USOC Jack: RJ49C
REN: Not applicable

Perle 833IS User Guide vii
About this Book
The Perle 833IS User Guide is intended for users ranging from novice to
experienced LAN Administrators. It is designed to help you install, configure and
manage the 833IS.
Users
Novice Novice Users can rely on the Guide to provide them with simple and easy to
understand steps. The extensive indexing, cross-referencing, illustrations and full
glossary are not only intended to help set up the 833IS, but also realize its full
potential. Take advantage of the Quick Install Chapter to get an overview of what’s
ahead. Make sure you familiarize yourself with the Icons used to convey important
information.
Experienced To meet the different needs of more experienced users, the Guide provides a Quick
Install Chapter. Brief and to the point, it gives a complete overview of the
installation and configuration process.
Once you have successfully installed the 833IS, turn to Section 3: Management, to
learn about the management features. If you still have any questions, turn to our
extensive index for help.
How to Use This Guide
This Guide is divided into three sections: Installation, Configuration, and
Management. Each section has a number of chapters that highlight a unique aspect
of that section. The order of the sections and the chapters within comprise a series of
steps that will lead to the successful installation and operation of the Perle 833IS.
Assumptions This Guide assumes that Users have at least a basic knowledge of LAN Theory and
terminology. It also presumes that some users will have extensive experience and
may wish to customize their configuration. To meet this need, we have included a
comprehensive discussion of features and parameters that can be customized along
with simple instructions on how perform them.

What’s in the Guide
viii Perle 833IS User Guide
While the Guide assumes LAN familiarity, we also assume that first time users want
simple explanations that provide context. Further, we believe that our new users
want to understand as much as they can, so we have provided a glossary to explain
any new terminology.
Icons You will find Icons throughout this guide. Use them to quickly locate useful and im-
portant information.
Procedure: Indicates a series of steps that you need to perform in order toset
up or configure the 833IS


Information: Provides important information that will make use of the
833IS easier.
What’s in the Guide
Installation Chapter 1:Quick Installation Overview: Although intended for the experienced
user, this chapter can assist the novice by previewing the steps ahead. Provides an
overview of installation and configuration.
Chapter 2: Site Preparation: This chapter provides a complete description of the
Electrical, Environmental and Cable Requirements of the 833IS.
Chapter 3: Setting Up and Installing the Perle 833IS: Familiarize yourself with the
unit’s physical appearance as well as the basic functions. Make the LAN
connections and verify its correct operation.
Chapter 4:Using the Perle 833IS Manager: This chapters describes the
requirements, function and features of the Manager Software.
Configuration Chapter 5:Configuring the Perle 833IS: Learn about Dial-In and Dial-Out access
and how configuration can help you fully exploit the potential of the 833IS.
Chapter 6: Configuring the Interfaces: Describes the unique characteristics and
requirements of each Interface.
Chapter 7: Configuring the Protocols: Learn about the various communication
protocols supported and how to use them.

About this Book
Perle 833IS User Guide ix
Chapter 8: Configuring the User Database: Learn how to custom define the user to
your system. Describes the various ways of identifying users and limiting their
access.
Chapter 9: Configuring the Server: Describes the parameters not related to Feature
Cards, protocols or users. Provides information about Security, Groups, Servers,
and more.
Management Chapter 10: Managing the Perle 833IS: Intended for experienced users. Learn about
Manager Statistics, Front Panel, and the Event Log. Also learn about upgrading your
software.
Appendix 1: Menu Descriptions: Gives the user a quick overview of the Front Panel
Menu Descriptions in table format.
Appendix 2: AT Command Set: Describes the commands that the Modem will
respond to as well the parameters applicable to each.
Appendix 3: Specifications: A detailed description of the physical parameters of the
833IS as well as its performance capabilities.
Appendix 4: RADIUS Server Attributes
Appendix 5: Cisco Mode
Glossary: This section provides a brief explanation of terms found in this Guide.
While the explanations are not exhaustive, they are intended to provide context to
their usage in the Guide.

What’s in the Guide
x Perle 833IS User Guide

Perle 833IS User Guide xi
Contents
Introduction...............................................................1
LAN-to-LAN.................................................................. 3
Section 1: Installation..................................... 5
Chapter 1: Quick Installation Overview...............7
Preparing theSite................................................................ 7
Settingup andInstalling the833ISHardware.................. 8
Settingupthe LANConnection......................................... 9
Configuring the 833IS......................................................... 9
Attaching tothe Telephone Network............................... 10
Verifying Correct Operation.............................................. 10
Chapter 2: Site Preparation..................................11
SitePreparationOverview............................................... 11
ElectricalRequirements.................................................... 12
Environmental Requirements.......................................... 13
Placement................................................................... 13
CablePlanningandRequirements................................. 14
LANCabling................................................................ 14
Ethernet....................................................................... 14
Token Ring.................................................................. 17
Telephony Cabling............................................................ 19
S/T Termination.......................................................... 19
Chapter 3: Setting Up and Installing..................21
What's in the box?...................................................... 21
Unpacking the833IS........................................................ 22
FamiliarizeYourselfwith theUnit..................................... 23
833IS Views................................................................ 23
833IS ChassisDescription........................................ 24
Feature Cards.................................................................... 25
SystemCard............................................................... 25
Expansion Card.......................................................... 26
Interfaces..................................................................... 26
SerialNumberLabel.................................................. 27
Power Switch.............................................................. 27
Assembling theHardware................................................ 27
Connect the Power Cord........................................... 27
Attaching theRack Mount......................................... 28
Factory DefaultMode....................................................... 29
Attaching theLAN Cable.................................................. 29
Ethernet....................................................................... 29
Token Ring.................................................................. 30
Setting upthe 833ISLAN Connection............................ 31
IPX Connection to the Manager............................... 32
IP Connection to the Manager.................................. 32
Setup the basicparameters..................................... 33
Verifying Connection......................................................... 37
Manager Status.......................................................... 38
LANStatus.................................................................. 38
IPStatus...................................................................... 39
IPXStatus................................................................... 40
Configuring the833IS....................................................... 41
Using the Manager..................................................... 41
Using Cisco Mode...................................................... 41
Attaching to the Telephone Network........................ 42
What's next?............................................................... 42
Chapter 4: Using the Perle 833IS Manager.......43
Overview............................................................................ 43
SystemRequirements...................................................... 44
LAN Connection........................................................ 44
WAN Connection...................................................... 44
Installing the Manager Software...................................... 45
Setting upfor Connection.......................................... 45
IPXConnection.......................................................... 45

xii Perle 833IS User Guide
IPConnection............................................................. 45
Connecting tothe Server................................................. 47
UsingIPX.................................................................... 47
UsingIP....................................................................... 47
Troubleshooting.......................................................... 48
Dial-In Connection.................................................... 48
Completing the Connection....................................... 49
Using the ManagerMain Screen .................................. 51
MenuBar..................................................................... 52
Tool Bar....................................................................... 56
Off-LineConfiguration................................................ 57
Loading Firmware............................................................ 58
Download via Manager.............................................. 58
Download via TFTP................................................... 59
Section 2: Configuration.............................. 61
Chapter 5: Configuring the Perle 833IS.............63
Howthe 833ISWorks...................................................... 63
Dial-InAccess............................................................. 63
Dial-OutAccess.......................................................... 66
Configuration Overview................................................... 67
Using Configuration Files................................................. 68
Creating....................................................................... 68
Opening....................................................................... 68
Uploading.................................................................... 68
Saving.......................................................................... 69
Downloading............................................................... 69
Configuration MainWindow...................................... 70
Adding......................................................................... 72
Removing.................................................................... 73
SettingtheDate andTime............................................... 74
Chapter 6: Configuring the Interfaces...............75
Overview........................................................................... 75
Editing.......................................................................... 76
Configure the Ethernet LAN Interface............................ 77
Configure theTokenRing LANInterface....................... 78
Configure theISDNBRI Line Interface.......................... 80
Overview..................................................................... 80
ISDNBRI UInterfaceConfiguration......................... 81
ISDNBRI S/TInterfaceConfiguration..................... 83
Configuring thePerle DSPModem Interface................ 86
V.90Modems............................................................. 88
Chapter 7: Configuring the Protocols...............89
Overview........................................................................... 89
Configuring theProtocols................................................ 91
Configuring IPProtocol.................................................... 92
WAN............................................................................ 94
WAN Network Address............................................ 94
WANIP Addresses.................................................... 96
DHCP.......................................................................... 98
IPPool......................................................................... 99
ServerIP Address................................................... 101
DNS/WINS............................................................... 103
Routing..................................................................... 104
RIPSetup................................................................. 104
StaticRoutes............................................................ 106
Add/EditIP Static Routes....................................... 108
IPFilter............................................................................. 109
FilterDefinition......................................................... 110
Add/Edit IP Filter Definition..................................... 112
FilterAssignment..................................................... 113
Configuring IPX............................................................... 114
IPXProtocol............................................................. 115
Routing..................................................................... 117
StaticRoute.............................................................. 117
Add/EditIPX Static Routes..................................... 120
IPXSAP TableList.................................................. 121
Add/EditIPX SAPEntries....................................... 122
FilterDefinition......................................................... 123
Add / Edit IPX FilterDefinition................................. 124
FilterAssignment..................................................... 125

Perle 833IS User Guide xiii
Configuring the Bridge Function (BCP)....................... 126
Protocol Filter............................................................ 127
Configuring PPP............................................................. 129
ApplePPP................................................................. 131
UsingAppleTalk............................................................. 132
UsingNetBEUI............................................................... 133
Chapter 8: Configuring the User Database....135
Overviewofthe User Database.................................... 135
Internal User Database............................................ 136
Configure the Internal User Database......................... 137
UserMain..................................................................137
Add/Edit User............................................................ 139
UserProfile................................................................141
Protocols...................................................................143
UserCallback........................................................... 145
Lan ToLan...................................................................... 147
Routing Information.................................................. 148
LANto LANConnectionTimers............................. 148
Authentication........................................................... 149
Dialingtherouter...................................................... 150
Lan ToLan Configuration........................................ 151
Remote System Login............................................. 151
Phone Numbers....................................................... 151
Connection................................................................152
Configure VirtualConnection.................................. 152
RIPSetup..................................................................154
Standard Profile.............................................................. 155
IP Filter Assignment................................................. 159
IPX Filter Assignment.............................................. 160
Shared User Database............................................ 160
Chapter 9: Configuring the Server...................163
Overview......................................................................... 163
Configuring the Server................................................... 164
To configure the Server........................................... 164
Dial-Out........................................................................... 166
Trigger Characters................................................... 168
Security............................................................................ 169
Overview................................................................... 169
Configuring UserAuthentication Security.................... 171
UserDatabase.........................................................171
Netware Bindery....................................................... 172
RADIUS.................................................................... 173
Axent.......................................................................... 176
SecurID.....................................................................179
NTDomain................................................................181
Group Settings................................................................ 182
Group Main...............................................................184
Add/EditGroup.........................................................185
Group Advanced...................................................... 187
User Standard Profile - Group................................ 187
PPP - Group............................................................. 187
Dial-Out -Group.......................................................187
Bridge Filter - Group................................................. 188
SNMP.............................................................................. 189
SNMPConfiguration................................................ 190
Community and Community Tables...................... 191
Logging Configuration..............................................192
Section 3: Management............................. 197
Chapter 10: Managing the Perle 833IS...........199
833ISManager Statistics.............................................. 199
Viewing Statistics......................................................199
Accessing Interface Statistics................................. 202
Ethernet Interface.....................................................202
Token RingInterface................................................ 203
ISDNBRI LineInterface.......................................... 204
PerleDSP ModemInterface...................................207
IPProtocol.................................................................209
IPXProtocol..............................................................212
UserStatistics...........................................................216
Event Log........................................................................ 218

xiv Perle 833IS User Guide
833IS FrontPanel.......................................................... 220
Front PanelModes.................................................. 220
NavigatingtheFront Panel..................................... 221
EditingFields............................................................ 221
Appendix 1: Menu Descriptions and Maps...223
Front PanelMainScreen............................................... 223
Front PanelMainScreen Map...................................... 223
Control............................................................................. 224
ControlMenuMap......................................................... 225
Status............................................................................... 226
StatusMenuMap........................................................... 227
CardStatus..................................................................... 228
CardStatuscontinued................................................... 229
CardStatuscontinued................................................... 230
CardStatus MenuMap................................................. 231
Network Status Display.................................................. 232
Network Status Display Menu Map.............................. 234
Factory DefaultMode.................................................... 235
Factory DefaultSetup.................................................... 235
Factory DefaultMode andSetupMap......................... 236
Factory DefaultMode.................................................... 237
Factory DefaultMode MenuMap................................. 239
Appendix 2: AT Command Set........................241
ATCommands............................................................... 241
AT&Commands..................................................... 251
AT%Commands.................................................... 253
AT\Commands....................................................... 254
AT+Commands...................................................... 255
Error Detection and Data Compression Commands. 259
AT%Commands.................................................... 259
AT\Commands....................................................... 259
S-Registers..................................................................... 261
S-Register Definitions.................................................... 263
ATCommand SetSummary........................................ 266
BasicAT Commands.............................................. 266
ECCCommands..................................................... 269
MNP 10 Commands............................................... 269
FAXClass 2............................................................. 269
Appendix 3: Specifications...............................271
Dimensions..................................................................... 271
Physical/Electrical Specifications.................................. 271
Chassis............................................................................ 272
Memory........................................................................... 272
LANInterfaces................................................................ 272
ISDNBRI Interface......................................................... 273
PerleDSP Modem Interface.......................................... 274
Approvals........................................................................ 275
Protocols Supported...................................................... 276
LANEnvironments......................................................... 276
DialIn ClientsSupported............................................... 277
DialOut............................................................................ 277
Security............................................................................ 277
Management.................................................................. 277
RFCs Supported............................................................ 278
Appendix 4: RADIUS Server Attributes..........279
AccountRequest Messages......................................... 279
Access-Accept Messages............................................. 280
Accounting Messages................................................... 282
Appendix 5: Cisco Configuration Mode.........285
Introduction to Cisco Configuration Mode.................... 285
Overview of833IS.......................................................... 286
Differences Between 833IS and Cisco Products........ 288
Command Overview...................................................... 291
Installation and Configuration of 833IS with Cisco
Configuration Mode....................................................... 291
Monitoring the833IS ..................................................... 296
Differences between 833IS Manager and Cisco
Configuration Mode........................................................ 296

Perle 833IS User Guide xv
Glossary.................................................................299 Index.......................................................................305

xvi Perle 833IS User Guide

Perle 833IS User Guide 1
Introduction
The Perle 833IS...ReliabilityandFlexibility
About the Features of the 833IS
Dial- In Access The 833IS lets Remote Users access the LAN (Local Area Network) via the
telephone network as if theyare directly attached to it. Remote Users can then access
file servers, Email, Mainframes, application servers, or any other server on your
LAN. It can be teamed with a remote control package such as PC Anywhere or
Carbon Copy to allow a user to use a locally attached PC remotely. It can even act as
a Dial-In gateway to another network, such as the Internet.
Dial- Out Access With Perle Dial-Out Client software, LAN attached PCs can use the PerleDSP
Modem and lines as Dial-Out modems. To the PCapplication, the PerleDSP Modem
and line attached to the 833IS look like a modem connected to the PC COM port.
Most PC applications that require a modem are supported. With appropriate
software, users can connect to a BBS, Internet provider, or any other service
accessible by the telephone network. When used with Fax software such as WinFax
Pro, users can send faxes from their PC.
BRI Support Calls are brought into the 833IS by an Integrated Services Digital Network (ISDN),
Basic Rate Interface (BRI) line. Using digital technology provides for a higher
reliability and the ability to transfer data at rates of up to 64kbps per channel. ISDN
also greatly increases the speed at which calls can be established and torn down. The
unit can support as many as 8 ISDN, BRI lines. Each BRI line can support up to 2
simultaneous phone calls allowing for a total of 16 simultaneous sessions. ISDN
provides for remote access from conventional modems, ISDN BRI cards or
Terminal Adapters.
There are two basic types of BRI interfaces available today. The “U” interface is a 2
wire interface which connects a Network Termination (NT) device to the central
office (CO). This is common in North America where the customer supplies the NT

Multiprotocol Support
2 Perle 833IS User Guide
device. The “S/T” interface is a 4 wire interface which is used to connect a “NT”
device to a Terminal Endpoint (TE) device. In this type of configuration, the user
can connect up to 8 TE device on one S/T bus. This type of configuration is more
common in Europe where the network normally provides the “NT” device.
Multiprotocol
Support There is direct support for IP (Internet Protocol), IPX (Internet Packet eXchange),
Netbeui, and AppleTalk routing protocols in their native form. They do not require
workarounds and special settings (such as Netbeui over IP) to be used. Logical Link
Control (LLC) bridging is supported for use in IBM Mainframe and Midrange
environments.
Multiple Dial In
Client Support Included with the 833IS arethe Perle Remote Dial-In Clients for DOS and Windows
3.1. Microsoft Dial Up Networking Clients are supported for Windows 95, 98, 2000
and Windows NT. For the Macintosh user, the 833IS is compatible with Apple
Remote Access.
In addition to these standard clients, many other third party clients can be used with
the 833IS.
Advanced User
Security The 833IS supports access protection by individual User ID and passwords.
Optionally, an external RADIUS or Novell server can be used for centralized access
management. Token authentication access systems such as Security Dynamics
SecurID and Axent can work with the 833IS to meet high security requirements.
The internal database of the 833IS supports up to 500 users, each with their own
password.
Fixed Callback and Roaming Callback are supported to meet both security
requirements and toll management.
Grouping The 833IS's powerful grouping functions lets you:
■Allocate connections for specific departments or have a connection always
available for the MIS (Management Information System) department.
■Set up a group of modems that are compatible with older Dial-In modems that
require special settings.
■Split connections into Dial-In only and Dial-Out only lines.
■Set one group of users with a maximum Dial-In time of one hour, and another
with unlimited access time.

Introduction
Perle 833IS User Guide 3
LAN-to-LAN The 833IS LAN-to-LAN feature lets you establish IP/IPX connections to remote
Routers. These connections can be initiated by either the 833IS or the remote
Router. The Virtual Connection feature can be used to provide cost effective
connections between two LANs.
Expandable
System You can size the hardware of the 833IS to meet the needs of your business. The
833IS supports the addition of an expansion card. As your remote access needs
grow, this card can be used to address the added demand. An expansion card can add
an additional 4 ISDN BRI ports to your unit or an additional 4 ISDN BRI ports as
well as an additional 8 modems. This capability allows the 833IS to grow to a total
of 8 ISDN BRI ports and 16 modems.
Flexible Modem
Support The 833IS modems support all the standard modem modulations, including V.90
and 56Kflex. Class 2 Fax support allows the use of the modems for Fax Dial-Out
when used with Fax Software such as WinFax Pro. The modem initialization string
can be customized for each modem to meet special requirements.
Manager The 833IS Manager is a Windows based application used to configure and manage
the 833IS. You can connect to the 833IS by a LAN or Dial In connection, using
either IP or IPX. The configuration process is entirely GUI based - no editing of
complex configuration files is needed. The Manager also displays the operational
status of the 833IS. Key statistics are providedfor all interfaces to enable monitoring
of normal operation and assist in network troubleshooting if necessary.
Cisco™ style
Configuration Mode The 833IS contains a Cisco™ style setup and configuration mode for users trained in
the installation and configuration of Cisco™ products. The familiar Cisco
Command Line Interface can be used along with applicable Cisco commands to set
up and manage the 833IS.
High
Performance
Architecture
The 833IS was designed for high performance, even when handling the maximum
number of incoming calls. At its heart is a high speed PowerPC Reduced Instruction
Set Computer (RISC) CPU, which is optimized for communications. The
expansion card contains its own PowerPC processor. This enables the 833IS to grow
the number of sessions supported without degrading the level of performance.

High Reliability Design
4 Perle 833IS User Guide
High Reliability
Design There are no moving storage devices such as floppy or hard drives in the 833IS. All
program storage is on Flash Read Only Memory (ROM).