Cambium Networks PMP 450 User manual

Cambium
PMP 450 Configuration and
User Guide
System Release 12.0

pmp-0050 (May 2012)
Accuracy
While reasonable efforts have been made to assure the accuracy of this document, Cambium Networks assumes no
liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained
herein. Cambium reserves the right to make changes to any products described herein to improve reliability, function,
or design, and reserves the right to revise this document and to make changes from time to time in content hereof
with no obligation to notify any person of revisions or changes. Cambium does not assume any liability arising out of
the application or use of any product, software, or circuit described herein; neither does it convey license under its
patent rights or the rights of others. It is possible that this publication may contain references to, or information
about Cambium products (machines and programs), programming, or services that are not announced in your
country. Such references or information must not be construed to mean that Cambium intends to announce such
Cambium products, programming, or services in your country.
Copyrights
This document, Cambium products, and 3rd Party Software products described in this document may include or
describe copyrighted Cambium and other 3rd Party supplied computer programs stored in semiconductor memories
or other media. Laws in the United States and other countries preserve for Cambium, its licensors, and other 3rd
Party supplied software certain exclusive rights for copyrighted material, including the exclusive right to copy,
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Cambium products described in this document may not be copied, reproduced, reverse engineered, distributed,
merged or modified in any manner without the express written permission of Cambium. Furthermore, the purchase of
Cambium products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license
under the copyrights, patents or patent applications of Cambium or other 3rd Party supplied software, except for the
normal non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.
Restrictions
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the software or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or
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Cambium.
License Agreements
The software described in this document is the property of Cambium and its licensors. It is furnished by express
license agreement only and may be used only in accordance with the terms of such an agreement.
High Risk Materials
Components, units, or 3rd Party products used in the product described herein are NOT fault-tolerant and are NOT
designed, manufactured, or intended for use as on-line control equipment in the following hazardous environments
requiring fail-safe controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication
Systems, Air Traffic Control, Life Support, or Weapons Systems (High Risk Activities). Cambium and its supplier(s)
specifically disclaim any expressed or implied warranty of fitness for such High Risk Activities.
© 2009 –2012 Cambium Networks, Inc. All Rights Reserved.

PMP 450 Configuration and User Guide
pmp-0050 (May 2012)
I
Safety and regulatory information
This section describes important safety and regulatory guidelines that must be observed by personnel installing
or operating PMP 450 equipment.
Important safety information
To prevent loss of life or physical injury, observe the safety guidelines in this section.
Power lines
Exercise extreme care when working near power lines.
Working at heights
Exercise extreme care when working at heights.
Grounding and protective earth
PMP 450 units must be properly grounded to protect against lightning. It is the user‘s responsibility to install
the equipment in accordance with national regulations. In the USA, follow Section 810 of the National Electric
Code, ANSI/NFPA No.70-1984 (USA). In Canada, follow Section 54 of the Canadian Electrical Code. These
codes describe correct installation procedures for grounding the outdoor unit, mast, lead-in wire and discharge
unit, size of grounding conductors and connection requirements for grounding electrodes. Other regulations
may apply in different countries and therefore it is recommended that installation of the outdoor unit be
contracted to a professional installer.
Powering down before servicing
Always power down and unplug the equipment before servicing.
Primary disconnect device
The main power supply is the primary disconnect device.
External cables
Safety may be compromised if outdoor rated cables are not used for connections that will be exposed to the
outdoor environment.

Safety and regulatory information
II
pmp-0050 (May 2012)
RF exposure near the antenna
Strong radio frequency (RF) fields will be present close to the antenna when the transmitter is on. Always turn
off the power to the PMP 450 unit before undertaking maintenance activities in front of the antenna.
Minimum separation distances
Install the units so as to provide and maintain the minimum separation distances from all persons.
Important regulatory information
The PMP 450 product is certified as an unlicensed device in frequency bands where it is not allowed to cause
interference to licensed services (called primary users of the bands).
Radar avoidance
In countries where radar systems are the primary band users, the regulators have mandated special
requirements to protect these systems from interference caused by unlicensed devices. Unlicensed devices must
detect and avoid co-channel operation with radar systems.
The PMP 450 system provides detect and avoid functionality for countries and frequency bands requiring
protection for radar systems.
Installers and users must meet all local regulatory requirements for radar detection. To meet these
requirements, users must set the correct region code during commissioning of the the PMP 450. If this is not
done, installers and users may be liable to civil and criminal penalties.
Contact the Cambium helpdesk if more guidance is required.

PMP 450 Configuration and User Guide
pmp-0050 (May 2012)
III
USA and Canada specific information
The USA Federal Communications Commission (FCC) has asked manufacturers to implement special features
to prevent interference to weather radar systems that operate in the band 5600 MHz to 5650 MHz. These
features must be implemented in all products able to operate outdoors in the band 5470 MHz to 5725 MHz.
Manufacturers must ensure that such radio products cannot be configured to operate outside of FCC rules;
specifically it must not be possible to disable or modify the radar protection functions that have been
demonstrated to the FCC.
In order to comply with these FCC requirements, Cambium supplies variants of the PMP 450 for operation in
the USA or Canada. These variants are only allowed to operate with region codes that comply with FCC/IC
rules.
Other variants of the PMP 450 are available for use in the rest of the world, but these variants are not supplied
to the USA or Canada except under strict controls, when they are needed for export and deployment outside
the USA or Canada.

PMP 450 Configuration and User Guide
pmp-0050 (May 2012)
i
Contents
Safety and regulatory information.................................................................................... I
Important safety information .............................................................................................................................. I
Important regulatory information ......................................................................................................................II
About This Configuration and User Guide ..................................................................... 1-8
General information..................................................................................................................................................1-9
Version information...........................................................................................................................................1-9
Contacting Cambium Networks ........................................................................................................................1-9
Problems and warranty ..........................................................................................................................................1-11
Security advice ....................................................................................................................................................... 1-13
Warnings, cautions, and notes................................................................................................................................1-14
Caring for the environment ....................................................................................................................................1-15
Chapter 1: Legal information ..................................................................................... 1-1
Cambium Networks end user license agreement .......................................................................................................1-2
Acceptance of this agreement ............................................................................................................................1-2
Definitions.........................................................................................................................................................1-2
Grant of license..................................................................................................................................................1-2
Conditions of use ...............................................................................................................................................1-3
Title and restrictions .........................................................................................................................................1-4
Confidentiality...................................................................................................................................................1-4
Right to use Cambium‘s name...........................................................................................................................1-5
Transfer .............................................................................................................................................................1-5
Updates .............................................................................................................................................................1-5
Maintenance ......................................................................................................................................................1-5
Disclaimer .........................................................................................................................................................1-6
Limitation of liability........................................................................................................................................1-6
U.S. government ...............................................................................................................................................1-7
Term of license...................................................................................................................................................1-7
Governing law ...................................................................................................................................................1-7
Assignment........................................................................................................................................................1-7
Survival of provisions........................................................................................................................................1-8
Entire agreement...............................................................................................................................................1-8
Hardware warranty ..................................................................................................................................................1-9
Limit of liability .....................................................................................................................................................1-10
Chapter 2: Configuration and alignment .................................................................... 2-1
Preparing for configuration and alignment ..............................................................................................................2-2
Safety precautions during configuration and alignment ...................................................................................2-2
Regulatory compliance during configuration and alignment ............................................................................2-2

Contents
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Task 1: Connecting to the unit..................................................................................................................................2-3
Configuring the management PC.......................................................................................................................2-3
Connecting to the PC and powering up .............................................................................................................2-5
Logging into the web interface ..........................................................................................................................2-5
Task 2: Configuring IP and Ethernet interfaces .......................................................................................................2-6
Configuring the AP IP interface........................................................................................................................2-6
NAT tab of the SM with NAT disabled ...........................................................................................................2-10
IP tab of the SM with NAT disabled...............................................................................................................2-14
NAT tab of the SM with NAT enabled............................................................................................................2-16
IP tab of the SM with NAT enabled................................................................................................................2-21
Reconnecting to the management PC .............................................................................................................2-21
VLAN Tab of the AP ......................................................................................................................................2-22
VLAN Membership Tab of the AP..................................................................................................................2-26
VLAN Tab of the SM ......................................................................................................................................2-27
VLAN Membership Tab of the SM..................................................................................................................2-31
PPPoE Tab of the SM .....................................................................................................................................2-32
NAT Port Mapping Tab of the SM..................................................................................................................2-36
Task 3: Upgrading the software version and using CNUT......................................................................................2-37
Checking the installed software version...........................................................................................................2-37
Upgrading to a new software version ..............................................................................................................2-37
Task 4: Configuring General and Unit settings .......................................................................................................2-41
General Tab of the AP.....................................................................................................................................2-41
Unit Settings Tab of the AP............................................................................................................................2-46
General Tab of the SM.....................................................................................................................................2-47
Unit Settings Tab of the SM............................................................................................................................2-51
Time tab of the AP ..........................................................................................................................................2-53
Task 5: Configuring security ...................................................................................................................................2-56
Isolating APs from the internet.......................................................................................................................2-56
Encrypting radio transmissions.......................................................................................................................2-57
Managing module access by passwords............................................................................................................2-58
Requiring SM Authentication .........................................................................................................................2-61
Filtering protocols and ports ...........................................................................................................................2-62
Encrypting downlink broadcasts.....................................................................................................................2-64
Isolating SMs...................................................................................................................................................2-64
Filtering management through Ethernet ........................................................................................................2-65
Allowing management only from specified IP addresses .................................................................................2-65
Configuring management IP by DHCP...........................................................................................................2-65
Denying All Remote Access.............................................................................................................................2-65
Reinstating Remote Access Capability............................................................................................................2-66
Security Tab of the AP....................................................................................................................................2-67
Protocol Filtering tab of the AP......................................................................................................................2-70
Port configuration tab of the AP.....................................................................................................................2-71
Security Tab of the SM....................................................................................................................................2-72

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Protocol Filtering Tab of the SM..................................................................................................................... 2-76
Port configuration tab of the SM ....................................................................................................................2-77
Task 6: Configuring radio parameters.....................................................................................................................2-79
Task 7: Setting up SNMP agent ............................................................................................................................. 2-92
SNMP Tab of the AP ......................................................................................................................................2-93
SNMP Tab of the SM ......................................................................................................................................2-96
Task 8: Configuring syslog .................................................................................................................................... 2-100
Configuring AP system logging (syslog) ........................................................................................................ 2-100
Configuring SM system logging (syslog) ........................................................................................................ 2-101
Task 9: Configuring remote access ........................................................................................................................ 2-102
Configuring SM IP over-the-air access .......................................................................................................... 2-102
Accessing SM over-the-air by LUID ............................................................................................................. 2-102
Denying All Remote Access........................................................................................................................... 2-103
Reinstating Remote Access Capability.......................................................................................................... 2-104
Task 10: Monitoring the AP-SM Link .................................................................................................................. 2-105
Monitoring the AP-SM Link.......................................................................................................................... 2-105
Task 11: Configuring quality of service ................................................................................................................ 2-106
Maximum Information Rate (MIR) Parameters........................................................................................... 2-106
Token Bucket Algorithm............................................................................................................................... 2-106
MIR Data Entry Checking............................................................................................................................ 2-107
Committed Information Rate........................................................................................................................ 2-107
Bandwidth from the SM Perspective............................................................................................................. 2-108
Interaction of Burst Allocation and Sustained Data Rate Settings .............................................................. 2-108
High-priority Bandwidth .............................................................................................................................. 2-108
Traffic Scheduling ......................................................................................................................................... 2-109
Setting the Configuration Source .................................................................................................................. 2-110
Quality of Service (QoS) Tab of the AP......................................................................................................... 2-113
DiffServ Tab of the AP ................................................................................................................................. 2-116
Quality of Service (QoS) Tab of the SM ........................................................................................................ 2-118
DiffServ Tab of the SM ................................................................................................................................. 2-120
Task 12: Configuring a RADIUS server ............................................................................................................... 2-122
Understanding RADIUS for PMP 450 ......................................................................................................... 2-122
Choosing Authentication Mode and Configuring for Authenti c ation Ser
v er s - AP
.................................. 2-123
SM Authentication Mode –Require RADIUS or Follow AP................................................................... 2-124
Handling Certificates..................................................................................................................................... 2-126
Configuring your RADIUS servers for SM authentication............................................................................ 2-127
Configuring your RADIUS server for SM configuration ............................................................................... 2-129
Using RADIUS for centralized AP and SM user name and password management...................................... 2-131
RADIUS Device Data Accounting................................................................................................................ 2-134
RADIUS Device Re-Authentication ............................................................................................................. 2-138
RADIUS Attribute Framed-IP-Address ....................................................................................................... 2-138
Chapter 3: Reference information .............................................................................. 3-1
FCC and ICC Information ........................................................................................................................................3-2

Contents
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Transmitter Output Power.......................................................................................................................................3-5
Exposure Separation Distances ................................................................................................................................3-1
Details of Exposure Separation Distances Calculations and Power Compliance Margins .................................3-1
Appendix A: Glossary ................................................................................................. A-1

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v
List of Figures
Figure 1 NAT tab of the SM with NAT disabled .........................................................................................................2-10
Figure 2 IP tab of the SM with NAT disabled .............................................................................................................2-14
Figure 3 NAT tab of the SM with NAT enabled ..........................................................................................................2-16
Figure 4 IP tab of SM with NAT enabled ....................................................................................................................2-21
Figure 5 VLAN tab of the AP......................................................................................................................................2-22
Figure 6 VLAN Membership tab of the SM ..................................................................................................................2-31
Figure 7 General Status tab view for GUEST-level account ........................................................................................2-59
Figure 8 SM Add User tab............................................................................................................................................ 2-59
Figure 9 Delete User tab of the SM ..............................................................................................................................2-60
Figure 10 RJ-11 pinout for the override plug............................................................................................................... 2-61
Figure 11 Categorical protocol filtering........................................................................................................................2-63
Figure 12 Ports filtered per protocol selection..............................................................................................................2-63
Figure 13 Security tab of the AP .................................................................................................................................2-67
Figure 14 Port Configuration tab of the SM.................................................................................................................. 2-77
Figure 15 Radio tab of the AP ......................................................................................................................................2-79
Figure 16 AP Syslog Configuration page.................................................................................................................... 2-100
Figure 17 SM Syslog Configuration page.................................................................................................................... 2-101
Figure 18 SM IP Configuration page.......................................................................................................................... 2-102
Figure 19 AP Session Status page .............................................................................................................................. 2-103
Figure 20 AP Remote Subscribers page ..................................................................................................................... 2-103
Figure 21 AP Session Status page .............................................................................................................................. 2-105
Figure 22 Uplink and downlink rate caps adjusted to apply aggregate cap ................................................................ 2-107
Figure 23 Uplink and downlink rate cap adjustment example.................................................................................... 2-107
Figure 24 Quality of Service (QoS) tab of the AP ...................................................................................................... 2-113
Figure 25 Diffserv tab of the AP ................................................................................................................................ 2-116
Figure 26 Quality of Service (QoS) tab of the SM ...................................................................................................... 2-118
Figure 27 Diffserv tab of the SM................................................................................................................................ 2-120
Figure 28 Security tab of the AP ............................................................................................................................... 2-124
Figure 29 Security tab of the SM ............................................................................................................................... 2-125
Figure 30 SM Certificate Management ....................................................................................................................... 2-127
Figure 31 AP display of RADIUS accept for SM ........................................................................................................ 2-128
Figure 32 AP display of RADIUS rejected SM ........................................................................................................... 2-129
Figure 33 SM display of RADIUS accpet ................................................................................................................... 2-129
Figure 34 User Authentication tab of the AP ............................................................................................................ 2-132
Figure 35 User Authentication tab of the SM ............................................................................................................ 2-134

List of Tables
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pmp-0050 (May 2012)
List of Tables
Table 1 IP interface attributes................................................................................................................. 2-8
Table 2 SM DNS Options with NAT Disabled....................................................................................... 2-11
Table 3 SM with NAT disabled - NAT attributes .................................................................................. 2-11
Table 4 SM with NAT disabled - IP attributes ...................................................................................... 2-14
Table 5 SM DNS Options with NAT Enabled ....................................................................................... 2-17
Table 6 SM with NAT enabled - NAT attributes................................................................................... 2-17
Table 7 SM with NAT enabled - IP attributes....................................................................................... 2-21
Table 8 SM with NAT enabled - IP attributes....................................................................................... 2-22
Table 9 VLAN Membership tab of the AP ............................................................................................ 2-26
Table 10 AP VLAN Membership attributes .......................................................................................... 2-26
Table 11 VLAN tab of the SM ............................................................................................................... 2-27
Table 12 SM VLAN attributes............................................................................................................... 2-27
Table 13 SM VLAN Membership attributes .......................................................................................... 2-32
Table 14 PPPoE tab of the SM.............................................................................................................. 2-32
Table 15 SM PPPoE attributes ............................................................................................................. 2-33
Table 16 NAT Port Mapping tab of the SM........................................................................................... 2-36
Table 17 SM PPPoE attributes ............................................................................................................. 2-36
Table 18 General tab of the AP ............................................................................................................. 2-41
Table 19 SM PPPoE attributes ............................................................................................................. 2-42
Table 20 Unit Settings tab of the AP..................................................................................................... 2-46
Table 21 AP Unit Settings attributes .................................................................................................... 2-46
Table 22 General tab of the SM ............................................................................................................. 2-47
Table 23 AP Unit Settings attributes .................................................................................................... 2-47
Table 24 Unit Settings tab of the SM..................................................................................................... 2-51
Table 25 SM Unit Settings attributes .................................................................................................... 2-52
Table 26 Unit Settings tab of the SM..................................................................................................... 2-53
Table 27 AP Time attributes ................................................................................................................. 2-53
Table 28 AP Security attributes ............................................................................................................ 2-68
Table 29 Protocol Filtering tab of the AP ............................................................................................. 2-70
Table 30 AP Protocol Filtering attributes ............................................................................................. 2-70
Table 31 Port configuration tab of the AP ............................................................................................ 2-71
Table 32 AP Port Configuration attributes ........................................................................................... 2-71
Table 33 Security tab of the SM ............................................................................................................ 2-72
Table 34 AP Security attributes ............................................................................................................ 2-73
Table 35 Protocol Filtering tab of the SM ............................................................................................. 2-76
Table 36 AP Protocol Filtering attributes ............................................................................................. 2-76
Table 37 SM Port Configuration attributes ........................................................................................... 2-78

PMP 450 Configuration and User Guide
General information
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Table 38 AP Radio attributes ................................................................................................................2-79
Table 39: Control slot settings for all OFDM APs in cluster....................................................................2-85
Table 40 Radio tab of SM.......................................................................................................................2-88
Table 41 SM Radio attributes ................................................................................................................2-88
Table 42 SNMP tab of the AP................................................................................................................2-93
Table 43 AP SNMP attributes ...............................................................................................................2-94
Table 44 SNMP tab of SM......................................................................................................................2-96
Table 45 SM SNMP attributes ...............................................................................................................2-97
Table 46 Syslog Configuration attributes .............................................................................................2-101
Table 47 Syslog Configuration attributes .............................................................................................2-101
Table 48 Characteristics of traffic scheduling ........................................................................................2-109
Table 49 Recommended combined settings for typical operations ........................................................2-111
Table 50 Where feature values are obtained for an SM with authentication required...........................2-112
Table 51 Where feature values are obtained for an SM with authentication disabled...........................2-112
Table 52 AP QoS attributes..................................................................................................................2-113
Table 53 Broadcast Downlink CIR achievable per Broadcast Repeat Count ........................................2-115
Table 54 AP Diffserv attributes ...........................................................................................................2-116
Table 55 AP Quality of Service attributes............................................................................................2-118
Table 56 SM Diffserv attributes ...........................................................................................................2-121
Table 57 RADIUS Vendor Specific Attributes (VSAs) ........................................................................2-130
Table 58 Device data accounting RADIUS attributes .........................................................................2-134
Table 59 RADIUS accounting messages configuration ........................................................................2-137
Table 60 RADIUS data accounting message interval ..........................................................................2-137
Table 61 Device re-authentication configuration .................................................................................2-138
Table 62 US FCC IDs and Industry Canada Certification Numbers and Covered Configurations .......... 3-2
Table 63 PMP 450 AP transmitter output power.................................................................................... 3-5
Table 64 Exposure Separation Distances ................................................................................................. 3-1
Table 65 Calculated Exposure Distances and Power Compliance Margins............................................... 3-2

General information
Chapter 1: Legal information
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pmp-0050 (May 2012)
About This Configuration and User Guide
This guide describes the configuration of the Cambium PMP 450 Series of point-to-multipoint
wireless equipment deployment. It is intended for use by the system administrator.

PMP 450 Configuration and User Guide
General information
pmp-0050 (May 2012)
1-9
General information
Version information
The following shows the issue status of this document since it was first released:
Issue
Date of
issue
Remarks
000v001
Jan 2012
System Release 12.0
Contacting Cambium Networks
PMP support website: http://www.cambiumnetworks.com/support
PMP main website: http://www.cambiumnetworks.com/pmp
Sales enquiries: [e-mail]
Email support: [e-mail]
Telephone numbers:
North America: [phone]
Latin/Central America: [phone]
Europe, Middle East or Africa: [phone]
Asia/Pacific: [phone]
For full list of Cambium support telephone numbers, see:
http://www.cambiumnetworks.com/support/technical.php
Address:
Cambium Networks Limited,
1299 E Algonquin Road
Schaumburg, IL 60196

General information
Chapter 1: Legal information
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pmp-0050 (May 2012)
Purpose
Cambium Networks Point-To-Multipoint (PMP) documents are intended to instruct and assist
personnel in the operation, installation and maintenance of the Cambium PMP equipment and
ancillary devices. It is recommended that all personnel engaged in such activities be properly
trained.
Cambium disclaims all liability whatsoever, implied or express, for any risk of damage, loss or
reduction in system performance arising directly or indirectly out of the failure of the customer,
or anyone acting on the customer's behalf, to abide by the instructions, system parameters, or
recommendations made in this document.
Cross references
References to external publications are shown in italics. Other cross references, emphasized in
blue text in electronic versions, are active links to the references.
This document is divided into numbered chapters that are divided into sections. Sections are not
numbered, but are individually named at the top of each page, and are listed in the table of
contents.
Feedback
We appreciate feedback from the users of our documents. This includes feedback on the
structure, content, accuracy, or completeness of our documents. Send feedback to email support
(see ‗Contacting Cambium Networks‘).

PMP 450 Configuration and User Guide
Problems and warranty
pmp-0050 (May 2012)
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Problems and warranty
Reporting problems
If any problems are encountered when installing or operating this equipment, follow this
procedure to investigate and report:
1
Search this document and the software release notes of supported releases.
2
Visit the support website.
3
Ask for assistance from the Cambium product supplier.
4
Gather information from affected units such as:
The IP addresses and MAC addresses.
The software releases.
The configuration of software features.
Any available diagnostic downloads.
5
Escalate the problem by emailing or telephoning support.
See ‗Contacting Cambium Networks‘ for URLs, email addresses and telephone numbers.
Repair and service
If unit failure is suspected, obtain details of the Return Material Authorization (RMA) process
from the support website.
Warranty
Cambium‘s standard hardware warranty is for one (1) year from date of shipment from Cambium
or a Cambium distributor. Cambium warrants that hardware will conform to the relevant
published specifications and will be free from material defects in material and workmanship
under normal use and service. Cambium shall within this time, at its own option, either repair or
replace the defective product within thirty (30) days of receipt of the defective product. Repaired
or replaced product will be subject to the original warranty period but not less than thirty (30)
days.
To register PMP products or activate warranties, visit the support website.
For warranty assistance, contact the reseller or distributor.
Using non-Cambium parts for repair could damage the equipment or void warranty. Contact
Cambium for service and repair instructions.

Problems and warranty
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pmp-0050 (May 2012)
Portions of Cambium equipment may be damaged from exposure to electrostatic discharge. Use
precautions to prevent damage.

PMP 450 Configuration and User Guide
Security advice
pmp-0050 (May 2012)
1-13
Security advice
Cambium Networks systems and equipment provide security parameters that can be configured
by the operator based on their particular operating environment. Cambium recommends setting
and using these parameters following industry recognized security practices. Security aspects to
be considered are protecting the confidentiality, integrity, and availability of information and
assets. Assets include the ability to communicate, information about the nature of the
communications, and information about the parties involved.
In certain instances Cambium makes specific recommendations regarding security practices,
however the implementation of these recommendations and final responsibility for the security of
the system lies with the operator of the system.

Warnings, cautions, and notes
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pmp-0050 (May 2012)
Warnings, cautions, and notes
The following describes how warnings and cautions are used in this document and in all
documents of the Cambium Networks document set.
Warnings
Warnings precede instructions that contain potentially hazardous situations. Warnings are used
to alert the reader to possible hazards that could cause loss of life or physical injury. A warning
has the following format:
Warning text and consequence for not following the instructions in the warning.
Cautions
Cautions precede instructions and are used when there is a possibility of damage to systems,
software, or individual items of equipment within a system. However, this damage presents no
danger to personnel. A caution has the following format:
Caution text and consequence for not following the instructions in the caution.
Notes
A note means that there is a possibility of an undesirable situation or provides additional
information to help the reader understand a topic or concept. A note has the following format:
Note text.