User Guide
Table Of Contents
- Cambium
- PMP 450 Planning Guide
- Accuracy
- Copyrights
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- Restrictions
- License Agreements
- High Risk Materials
- Safety and regulatory information
- Contents
- List of Figures
- List of Tables
- About This Planning Guide
- PMP support website: http://www.cambiumnetworks.com/support
- Cambium main website: http://www.cambiumnetworks.com/
- Sales enquiries: solutions@cambiumnetworks.com
- Email support: support@cambiumnetworks.com
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- Address:
- Chapter 1: Planning considerations
- Regulatory planning
- Network migration planning
- Site planning
- Link planning
- Analyzing the RF Environment
- Selecting Sites for Network Elements
- Diagramming Network Layouts
- Grounding and lightning protection
- Configuration options for TDD synchronization
- Data network planning
- Security planning
- Isolating APs from the Internet
- Managing module access by passwords
- Filtering protocols and ports
- Port Lockdown
- Isolating SMs
- Filtering management through Ethernet
- Allowing management from only specified IP addresses
- Configuring management IP by DHCP
- Planning for airlink security
- Planning for RF Telnet Access Control
- Forwarding Downlink PPPoE PADI packets
- Planning for RADIUS integration
- Planning for SNMP security
- Ordering components
- Chapter 2: Legal information
- Cambium Networks end user license agreement
- Acceptance of this agreement
- Definitions
- Grant of license
- Conditions of use
- Title and restrictions
- Confidentiality
- Right to use Cambium’s name
- Transfer
- Updates
- Maintenance
- Disclaimer
- Limitation of liability
- U.S. government
- Term of license
- Governing law
- Assignment
- Survival of provisions
- Entire agreement
- Third party software
- Hardware warranty
- Limit of liability
- Cambium Networks end user license agreement
- Chapter 3: Reference information
PMP 450 Planning Guide
Attribute Meaning
Transmitter Output Power
This value represents the combined power of the AP’s two transmitters.
Nations and regions may regulate transmitter output power. For example
• 5.4/5.8-GHz modules are available as connectorized radios, which require
the operator to adjust power to ensure regulatory compliance.
The professional installer of the equipment has the responsibility to
• maintain awareness of applicable regulations.
• calculate the permissible transmitter output power for the module.
• confirm that the initial power setting is compliant with national or
regional regulations.
• confirm that the power setting is compliant following any reset of the
module to factory defaults.
External Gain
This value represents the amount of gain introduced by an external antenna.
Module Type
Recommended
Setting
OFDM connectorized with antenna
that was purchased with it
17
Receive Quality Debug
To aid in link performance monitoring, the AP and SM now report the number
of fragments received per modulation (i.e. QPSK, 16-QAM, 64-QAM) and per
channel (polarization).
Due to CPU load, this will slightly degrade packet per second processing.
Broadcast Repeat Count
The default is 2 repeats (in addition to the original broadcast packet, for a
total of 3 packets sent for every one needed), and is settable to 1 or 0 repeats (2
or 1 packets for every broadcast).
ARQ (Automatic Repeat reQuest) is not present in downlink broadcast
packets, since it would cause unnecessary uplink traffic from every SM for
each broadcast packet. For successful transport without ARQ, the AP repeats
downlink broadcast packets. The SMs filter out all repeated broadcast packets
and, thus, do not transport further.
The default of 2 repeats is optimum for typical uses of the network as an
internet access system. In applications with heavy download broadcast such as
video distribution, overall throughput is significantly improved by setting the
repeat count to 1 or 0. This avoids flooding the downlink with repeat
broadcast packets.
pmp-0047 (March 2014)
1-25