Comtech EF Data CDM-840 User manual

Part Number MN-CDM840 Revision 0
IMPORTANT NOTE: The information contained in this document supersedes all previously published
information regarding this product. Product specifications are subject to change without prior notice.
CD
M
-
8
4
0
Remote Router
Installation and Operation Manual
For Firmware Version 1.1.1 or higher

PLM DOC ID ER-CDM840.EA0 THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! PLM CO C14382
1 OF 2
Errata A
Comtech EF Data Documentation Update
Subject:
Revised Section 4.2 Ethernet FTP Upload Procedure
Original Manual Part
Number/Rev:
MN-CDM840 Rev 0
Errata Number/
PLM Document ID:
ER-CDM840.EA0
PLM CO Number:
C14382
Comments:
Replaces Step 9 on manual page 4-4.
The updated information will be incorporated into the next formal
revision of the manual. See page 2 of 2 of this document.

PLM DOC ID ER-CDM840.EA0 THIS DOCUMENT IS NOT SUBJECT TO REVISION/UPDATE! PLM CO C14382
2 OF 2
REVISE Sect. 4.2 Ethernet FTP Upload Procedure Step 9:
WAS

Copyright © 2010 Comtech EF Data. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA,480.333.2200, FAX: [phone]
CDM-840
Remote Router
Installation and Operation Manual
For Firmware Version 1.1.1 or Higher
Part Number MN-CDM840
Revision 0
October 18, 2010

This page is intentionally blank.

iii
Table of Contents
TABLE OF CONTENTS ..............................................................................................................III
TABLES..................................................................................................................................... VII
FIGURES................................................................................................................................... VII
PREFACE................................................................................................................................... IX
About this Manual .....................................................................................................................................ix
Reporting Comments or Suggestions Concerning this Manual...............................................................ix
Conventions and References.....................................................................................................................ix
Metric Conversion ...................................................................................................................................ix
Recommended Standard Designations.....................................................................................................ix
Trademarks ..............................................................................................................................................ix
Cautions and Warnings..............................................................................................................................x
Electrical Safety and Compliance..............................................................................................................x
Fuses ......................................................................................................................................................x
Low Voltage Directive (LVD).................................................................................................................xi
Installation................................................................................................................................................xi
Environmental............................................................................................................................................xi
Telecommunications Terminal Equipment Directive............................................................................xii
CE Mark....................................................................................................................................................xii
RoHS Compliance.....................................................................................................................................xii
EMC (Electromagnetic Compatibility) Compliance..............................................................................xii
Warranty Policy.......................................................................................................................................xiii
Limitations of Warranty.........................................................................................................................xiii
Exclusive Remedies...............................................................................................................................xiv
Customer Support.....................................................................................................................................xv
Online Customer Support .......................................................................................................................xv
CHAPTER 1.INTRODUCTION .............................................................................................1–1
1.1Overview......................................................................................................................................1–1

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1.2Functional Description ...............................................................................................................1–2
1.3Features........................................................................................................................................1–4
1.3.1Physical Description.................................................................................................................1–4
1.3.1.1Standard Hardware............................................................................................................1–4
1.3.1.2Standard Assemblies.........................................................................................................1–4
1.3.1.3Optional Hardware............................................................................................................1–4
1.3.1.4Optional Assemblies.........................................................................................................1–4
1.3.2Compatibility............................................................................................................................1–4
1.3.3Dimensional Envelope..............................................................................................................1–5
1.3.4Physical Features......................................................................................................................1–6
1.3.4.1Front Panel........................................................................................................................1–6
1.3.4.2Rear Panel.........................................................................................................................1–7
1.3.5Data Interfaces..........................................................................................................................1–7
1.3.6Verification...............................................................................................................................1–7
1.3.7Flash Upgrading Firmware.......................................................................................................1–7
1.3.8Fully Accessible System Topology (FAST).............................................................................1–8
1.4Summary of Specifications.........................................................................................................1–9
1.4.1BER (Bit Error Rate)..............................................................................................................1–10
1.4.2Regulatory Compliance..........................................................................................................1–11
CHAPTER 2.INSTALLATION ..............................................................................................2–1
2.1Unpacking and Inspection..........................................................................................................2–1
2.2Mounting......................................................................................................................................2–2
2.2.1Optional Rear-Mounting Support Bracket Kit...........................................................................2–2
CHAPTER 3.REAR PANEL CONNECTOR AND PINOUTS................................................3–1
3.1Connector Overview...................................................................................................................3–1
3.2IF Connections ............................................................................................................................3–2
3.2.1Rx IF Connector .......................................................................................................................3–2
3.2.2Tx IF Connector........................................................................................................................3–2
3.3Terrestrial Data Connections.....................................................................................................3–3
3.3.1(FUTURE) G.703 OUT/IN Connectors, BNC .........................................................................3–3
3.3.2TRAFFIC GE (Gigabit Ethernet) Connector, RJ-45................................................................3–3
3.3.3MANAGEMENT FE (Fast Ethernet) Connector, RJ-45..........................................................3–3
3.4Utility Connections......................................................................................................................3–4
3.4.1(FUTURE) REDUNDANCY Connector, DB-9F ....................................................................3–4
3.4.2CONSOLE Interface Connector, DB-9M.................................................................................3–4
3.5Power / Ground Connections.....................................................................................................3–5
3.5.1Alternating Current (AC) Power Interface (Standard) .............................................................3–5
3.5.2Direct Current (DC) Power Interface (Optional)......................................................................3–5

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3.5.3Chassis Ground Interface..........................................................................................................3–5
CHAPTER 4.FLASH UPGRADING......................................................................................4–1
4.1Flash Updating via Internet.......................................................................................................4–1
4.2Ethernet FTP Upload Procedure...............................................................................................4–2
CHAPTER 5.ETHERNET MANAGEMENT ..........................................................................5–1
5.1Introduction.................................................................................................................................5–1
5.2Ethernet Management Interface Protocols...............................................................................5–1
5.2.1Ethernet Management Interface Access ...................................................................................5–1
5.3SNMP Interface...........................................................................................................................5–2
5.3.1Management Information Base (MIB) Files.............................................................................5–2
5.3.2SNMP Community Strings.......................................................................................................5–2
5.4Web Server (HTTP) Interface...................................................................................................5–3
5.4.1Web Server Interface Introduction ...........................................................................................5–3
5.4.2User Login................................................................................................................................5–3
5.4.3Web Server Menu Tree.............................................................................................................5–4
5.4.4Web Server Page Descriptions .................................................................................................5–5
5.4.4.1About the Virtual Front Panel...........................................................................................5–5
5.4.4.2Home Pages ......................................................................................................................5–6
5.4.4.2.1Home | Home ..............................................................................................................5–6
5.4.4.2.2Home | Contact............................................................................................................5–7
5.4.4.3Admin Pages.....................................................................................................................5–8
5.4.4.3.1Admin | Access ...........................................................................................................5–8
5.4.4.3.2Admin | SNMP............................................................................................................5–9
5.4.4.3.3Admin | FAST...........................................................................................................5–10
5.4.4.3.4Admin | Firmware.....................................................................................................5–11
5.4.4.3.5Admin | Auto Logout................................................................................................5–12
5.4.4.4Configuration Pages........................................................................................................5–12
5.4.4.4.1Configuration | Interface...........................................................................................5–12
5.4.4.4.1.1Configuration | Interface | FE Mgt.....................................................................5–13
5.4.4.4.1.2Configuration | Interface | GE............................................................................5–14
5.4.4.4.2Configuration | Demod..............................................................................................5–15
5.4.4.4.3Configuration | Mod..................................................................................................5–17
5.4.4.4.4Configuration | ARP..................................................................................................5–19
5.4.4.4.5Configuration | Routing.............................................................................................5–20
5.4.4.4.5.1Configuration | Routing | Routes........................................................................5–20
5.4.4.4.6Configuration | WAN pages......................................................................................5–22
5.4.4.4.6.1Configuration | WAN | Label.............................................................................5–22
5.4.4.4.6.2Configuration | WAN | QoS...............................................................................5–23
5.4.4.4.8Configuration | LNB (Low Noise Block Down Converter)......................................5–29
5.4.4.5Status pages.....................................................................................................................5–30
5.4.4.5.1.1Status | Statistics | Traffic...................................................................................5–30

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5.4.4.5.1.2Status | Statistics | Router...................................................................................5–32
5.4.4.5.1.3Status | Statistics | QoS.......................................................................................5–33
5.4.4.5.2Status | Monitor page ................................................................................................5–35
5.4.4.6Utility pages....................................................................................................................5–36
5.4.4.6.1Utility | Utility Page..................................................................................................5–36
5.4.4.6.2Utility | Reboot page .................................................................................................5–38
CHAPTER 6.FORWARD ERROR CORRECTION...............................................................6–1
6.1Introduction.................................................................................................................................6–1
6.2DVB-S2: LDPC and BCH..........................................................................................................6–1
6.2.1Range of Data Rates .................................................................................................................6–2
6.2.2BER, QEF, Eb/No, Es/No Spectral Efficiency, and Occupied Bandwidth......................................6–2
6.3VersaFEC (Short-block LDPC)................................................................................................6–2
6.3.1Range of Data Rates .................................................................................................................6–4
6.4CDM-840 Rx/Tx Error Performance Characteristics.............................................................6–4
APPENDIX A.FAST ACTIVATION PROCEDURE.............................................................. A–1
A.1Introduction................................................................................................................................A–1
A.2Activation Procedure via Web Server Interface.....................................................................A–2
A.2.1View Currently Installed Features...........................................................................................A–2
A.2.2Record Serial Number.............................................................................................................A–2
A.2.3Acquire/Enter FAST Access Code..........................................................................................A–3
A.2.4Verify FAST Option Availability............................................................................................A–3
APPENDIX B.REMOTE CONTROL .................................................................................... B–1
B.1Overview..................................................................................................................................... B–1
B.2EIA-232....................................................................................................................................... B–1
B.3Basic Protocol............................................................................................................................. B–1
B.4Packet Structure......................................................................................................................... B–2
B.4.1Start of Packet.......................................................................................................................... B–2
B.4.2Target Address......................................................................................................................... B–3
B.4.3Address Delimiter.................................................................................................................... B–3
B.4.4Instruction Code ...................................................................................................................... B–3
B.4.5Instruction Code Qualifier....................................................................................................... B–3
B.4.6Optional Message Arguments.................................................................................................. B–4
B.4.7End of Packet........................................................................................................................... B–4
B.5Remote Commands and Queries.............................................................................................. B–5
B.5.1Unit Parameter Commands and Queries.................................................................................. B–6

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Tables
Table 3-1. CDM-840 Rear Panel Connectors...........................................................................................3–2
Table 3-2. REMOTE CONSOLE Connector Pinouts..............................................................................3–4
Table 6-1. The VersaFEC ModCod set.....................................................................................................6–4
Figures
Figure 1-1. CDM-840 Remote Router......................................................................................................1–1
Figure 1-2. CDM-840 Network Topology Example.................................................................................1–2
Figure 1-3. CDM-840 Dimensional Envelope..........................................................................................1–5
Figure 1-4. CDM-840 – Front Panel View...............................................................................................1–6
Figure 1-5. CDM-840 – Rear Panel View ................................................................................................1–7
Figure 2-1. Installation of Optional Rear-Mounting Support Bracket Kit...............................................2–3
Figure 3-1. CDM-840 – Rear Panel View ................................................................................................3–1
Figure 4-1. Flash Update via Internet .......................................................................................................4–1
Figure 5-1. CDM-840 Remote Router Home (Splash) page.....................................................................5–6
Figure 5-2. Home | Contact page ..............................................................................................................5–7
Figure 5-3. Admin | Access page..............................................................................................................5–8
Figure 5-4. Admin | SNMP page ..............................................................................................................5–9
Figure 5-5. Admin | FAST page..............................................................................................................5–10
Figure 5-6. Admin | Firmware page........................................................................................................5–11
Figure 5-7. Admin | Auto Logout page...................................................................................................5–12
Figure 5-8. Configuration | Interface | FE Mgt Page...............................................................................5–13
Figure 5-9. Configuration | Interface | GE Page......................................................................................5–14
Figure 5-10. Configuration | Demod page ..............................................................................................5–15
Figure 5-11. Configuration| Mod page....................................................................................................5–17
Figure 5-12. Configuration | ARP page ..................................................................................................5–19
Figure 5-13. Configuration | Routing | Routes page ...............................................................................5–20
Figure 5-14. Configuration | WAN | Label page.....................................................................................5–22
Figure 5-15. Configuration | WAN | QoS pages.....................................................................................5–23
Figure 5-16. Configuration | WAN | QoS pages (cont)...........................................................................5–24
Figure 5-17. Configuration | BUC page..................................................................................................5–28
Figure 5-18. Configuration | LNB page..................................................................................................5–29
Figure 5-19. Status | Statistics | Traffic page ..........................................................................................5–30
Figure 5-20. Status | Statistics | Router page...........................................................................................5–32
Figure 5-21. Status | Statistics | QoS pages.............................................................................................5–33
Figure 5-22. Status | Statistics | QoS pages (cont) ..................................................................................5–34
Figure 5-23. Status | Monitor page..........................................................................................................5–35
Figure 5-24. Utility | Utility page............................................................................................................5–36
Figure 5-25. Utility | Reboot page...........................................................................................................5–38
Figure 6-1. The VersaFEC Codes versus Shannon Capacity....................................................................6–3
Figure 6-2. DVB-S2 QPSK Packet Error Rate versus Es/No...................................................................6–5
Figure 6-3. DVB-S2 8PSK Packet Error Rate versus Es/No....................................................................6–6
Figure 6-4. DVB-S2 16APSK Packet Error Rate versus Es/No...............................................................6–7
Figure 6-5. DVB-S2 32APSK Packet Error Rate versus Es/No...............................................................6–8

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Figure 6-6. VersaFEC Codec – BPSK, Rate 0.488...................................................................................6–9
Figure 6-7. VersaFEC Codec – QPSK, Rate 0.533, 0.631, 0.706 and 0.803..........................................6–10
Figure 6-8. VersaFEC Codec – 8-QAM, Rate 0.642, 0.711, and 0.780 .................................................6–11
Figure 6-9. VersaFEC Codec – 16-QAM, Rate 0.731, 0.780, 0.829 and 0.853 .....................................6–12

ix
PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data CDM-840
Remote Router. This is a technical document intended for earth station engineers, technicians,
and operators responsible for the operation and maintenance of the CDM-840.
Reporting Comments or Suggestions Concerning this Manual
Comments and suggestions regarding the content and design of this manual will be appreciated.
To submit comments, please contact the Comtech EF Data Technical Publications Department:
[email protected]
Conventions and References
Metric Conversion
Metric conversion information is located on the inside back cover of this manual. This information
is provided to assist the operator in cross-referencing non-Metric to Metric conversions.
Recommended Standard Designations
Recommended Standard (RS) Designations have been superseded by the new designation of the
Electronic Industries Association (EIA). References to the old designations may be shown when
depicting actual text displayed on the Web or Telnet (i.e., remote control) interface pages for the
unit (e.g., RS-232). All other references in the manual will be shown with the EIA designations.
Trademarks
Product names mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.

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IMPORTANT
The user should carefully observe the following information:
Cautions and Warnings
IMPORTANT
IMPORTANT or NOTE indicates a statement associated with the task being
performed or information critical for proper equipment function.
CAUTION
CAUTION indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury. CAUTION may also be used to indicate other unsafe
practices or risks of property damage.
WARNING
WARNING indicates a potentially hazardous situation that, if not avoided, could
result in death or serious injury.
Electrical Safety and Compliance
The CDM-840 has been shown to comply with the EN 60950 Safety of Information
Technology Equipment (Including Electrical Business Machines) safety standard.
The equipment is rated for operation over the range 100V to 240V AC or, appropriately equipped,
36V to 60V DC. It has a maximum power consumption of 245W.
Fuses
CAUTION
FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES WITH
THE CORRECT TYPE AND RATING.
The CDM-840 is fitted with two (2X) 20mm Slow-blow type fuses:
•For 230V/115V AC standard router operation use T2.5A (2.5 amp) fuses or, when a BUC
is installed, use T4A (4 amp) fuses. These fuses – one each for line and neutral
connections – are contained within the body of the IEC power inlet connector behind a
small plastic flap.
Examples of
Multi-Hazard Formats

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•For 48VDC standard router operation, use T3A (3 amp) fuses or, when a BUC is
installed, use T5A (5 amp) fuses. These fuses are contained within individual screw-in
receptacles on the CDM-840 rear panel, below the terminal blocks.
Low Voltage Directive (LVD)
The following information is applicable for the European Low Voltage Directive (2006/95/EC):
Symbol Description
<HAR> Type of power cord required for use in the European
Community.
!
CAUTION: Double-pole/Neutral Fusing
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung
International Symbols
Symbol Definition Symbol Definition
Alternating
Current Protective
Earth
Fuse Chassis
Ground
IMPORTANT
For additional symbols, refer to Cautions and Warnings listed earlier in this
Preface.
Installation
The installation and connection to the line supply must be made in compliance to local or national
wiring codes and regulations.
The CDM-840 is designed for connection to a power system that has separate ground, line and
neutral conductors. The equipment is not designed for connection to power system that has no
direct connection to ground.
The CDM-840 is shipped with a line inlet cable suitable for use in the country of operation. If it is
necessary to replace this cable, ensure the replacement has an equivalent specification. Examples
of acceptable ratings for the cable include HAR, BASEC and HOXXX-X. Examples of
acceptable connector ratings include VDE, NF-USE, UL, CSA, OVE, CEBEC, NEMKO,
DEMKO, BS1636A, BSI, SETI, IMQ, KEMA-KEUR and SEV.
Environmental
The CDM-840 must not be operated in an environment where the unit is exposed to extremes of
temperature outside the ambient range 0° to 50°C (32° to 122°F); precipitation, condensation, or
humid atmospheres above 95% relative humidity; altitudes (un-pressurized) greater than 2000
meters; excessive dust or vibration; flammable gases; or corrosive or explosive atmospheres.

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Operation in vehicles or other transportable installations that are equipped to provide a stable
environment is permitted. If such vehicles do not provide a stable environment, safety of the
equipment to EN60950 may not be guaranteed.
Telecommunications Terminal Equipment Directive
In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC, this
equipment should not be directly connected to the Public Telecommunications Network.
CE Mark
Comtech EF Data declares that the CDM-840 meets the necessary requirements for the CE Mark.
RoHS Compliance
This unit satisfies (with exemptions) the requirements specified in the European Union Directive on
the Restriction of Hazardous Substances, Directive 2002/95/EC, (EU RoHS).
EMC (Electromagnetic Compatibility) Compliance
In accordance with European Directive 2004/108/EEC, the CDM-840 has been shown, by
independent testing, to comply with the following standards:
Emissions: EN 55022 Class B - Limits and methods of measurement of radio
interference characteristics of Information Technology Equipment.
(Also tested to FCC Part 15 Class B.)
Immunity: EN 55024 – Information Technology Equipment: Immunity
Characteristics, Limits, and Methods of Measurement.
Additionally, the CDM-840 has been shown to comply with the following standards:
EN 61000-3-2 – Harmonic Currents Emission;
EN 61000-3-3 – Voltage Fluctuations and Flicker.
IMPORTANT
To ensure that the CDM-840 continues to comply with these standards,
observe the following instructions:
•Connections to the transmit and receive L-Band ports (Type ‘N’ female connectors)
should be made using a good quality coaxial cable.
•All 'D' type connectors attached to the rear panel must have back-shells that provide
continuous metallic shielding. Cable with a continuous outer shield (either foil or braid,
or both) must be used, and the shield must be bonded to the back-shell.
•The equipment must be operated with its cover on at all times. If it becomes necessary to
remove the cover, the user should ensure that the cover is correctly refitted before normal
operation commences.

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Warranty Policy
Comtech EF Data products are warranted against defects in material and workmanship
for a specific period from the date of shipment, and this period varies by product. In
most cases, the warranty period is two years. During the warranty period, Comtech EF
Data will, at its option, repair or replace products that prove to be defective. Repairs are
warranted for the remainder of the original warranty or a 90 day extended warranty,
whichever is longer. Contact Comtech EF Data for the warranty period specific to the
product purchased.
For equipment under warranty, the owner is responsible for freight to Comtech EF Data
and all related customs, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for
the freight charges only for return of the equipment from the factory to the owner.
Comtech EF Data will return the equipment by the same method (i.e., Air, Express,
Surface) as the equipment was sent to Comtech EF Data.
All equipment returned for warranty repair must have a valid RMA number issued prior
to return and be marked clearly on the return packaging. Comtech EF Data strongly
recommends all equipment be returned in its original packaging.
Comtech EF Data Corporation’s obligations under this warranty are limited to repair or
replacement of failed parts, and the return shipment to the buyer of the repaired or
replaced parts.
Limitations of Warranty
The warranty does not apply to any part of a product that has been installed, altered,
repaired, or misused in any way that, in the opinion of Comtech EF Data Corporation,
would affect the reliability or detracts from the performance of any part of the product, or
is damaged as the result of use in a way or with equipment that had not been previously
approved by Comtech EF Data Corporation.
The warranty does not apply to any product or parts thereof where the serial number or the
serial number of any of its parts has been altered, defaced, or removed.
The warranty does not cover damage or loss incurred in transportation of the product.
The warranty does not cover replacement or repair necessitated by loss or damage from
any cause beyond the control of Comtech EF Data Corporation, such as lightning or other
natural and weather related events or wartime environments.
The warranty does not cover any labor involved in the removal and or reinstallation of
warranted equipment or parts on site, or any labor required to diagnose the necessity for
repair or replacement.
The warranty excludes any responsibility by Comtech EF Data Corporation for incidental or
consequential damages arising from the use of the equipment or products, or for any inability
to use them either separate from or in combination with any other equipment or products.

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A fixed charge established for each product will be imposed for all equipment returned
for warranty repair where Comtech EF Data Corporation cannot identify the cause of the
reported failure.
Exclusive Remedies
Comtech EF Data Corporation’s warranty, as stated is in lieu of all other warranties,
expressed, implied, or statutory, including those of merchantability and fitness for a
particular purpose. The buyer shall pass on to any purchaser, lessee, or other user of
Comtech EF Data Corporation’s products, the aforementioned warranty, and shall
indemnify and hold harmless Comtech EF Data Corporation from any claims or
liability of such purchaser, lessee, or user based upon allegations that the buyer, its
agents, or employees have made additional warranties or representations as to product
preference or use.
The remedies provided herein are the buyer’s sole and exclusive remedies. Comtech EF
Data shall not be liable for any direct, indirect, special, incidental, or consequential
damages, whether based on contract, tort, or any other legal theory.

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Customer Support
Contact the Comtech EF Data Customer Support Department for:
•Product support or training
•Reporting comments or suggestions concerning manuals
•Information on upgrading or returning a product
A Customer Support representative may be reached during normal business hours at:
Comtech EF Data
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
480.333.2200 (Main Comtech EF Data number)
480.333.4357 (Customer Support Desk)
480.333.2161 FAX
To return a Comtech EF Data product (in-warranty and out-of-warranty) for repair or
replacement:
•Contact the Comtech EF Data Customer Support Department during normal business
hours. Be prepared to supply the Customer Support representative with the model number,
serial number, and a description of the problem.
•Request a Return Material Authorization (RMA) number from the Comtech EF Data
Customer Support representative.
•Pack the product in its original shipping carton/packaging to ensure that the product is
not damaged during shipping.
•Ship the product back to Comtech EF Data. (Shipping charges should be prepaid.)
Online Customer Support
An RMA number can be requested electronically by accessing Comtech EF Data’s online
Support page (www.comtechefdata.com/support.asp). From this page:
•Click the Service hyperlink, then read the Return Material Authorization section for
detailed instructions on Comtech EF Data’s return procedures.
•Click [Send RMA Request] on the Support page or the RMA Request hyperlink provided
in the Service | Return Material Authorization section; fill out the Billing Information,
Return Information, and Unit to be Returned sections completely, then click [Send email]
– or –
•Send an e-mail providing this same detailed information to the Customer Support
Department at [email protected].
Refer to p. xiii in this Preface for information regarding this product’s Warranty Policy.

CDM-840 Remote Router Revision 0
Preface MN-CDM840
xvi
Notes: