Cambium Networks PTP 550 Series, User Manual

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Chapter 1: Product description Wireless operation
Page 1-12
Note
The system automatically chooses between dual and single payload to try to increase
the capacity of a link.
Further reading
For information about… Refer to…
Single and dual payload modulation modes System threshold on page 3-36
Encryption
The PTP 550 supports optional encryption for data transmitted over the wireless link. The
encryption algorithm used is the Advanced Encryption Standard (AES) with 128-bit key size.
AES is a symmetric encryption algorithm approved by U.S. Government organizations (and
others) to protect sensitive information.
Further reading
For information about… Refer to…
AES requirement for HTTPS/TLS Transport layer security on page 1-18
Regulatory bands
The PTP 550 provides the ability to choose the country of operation for the ODU, and lists the
regulatory bands that are licensed by regulators in that country. Please note that some SKUs
limit countries of selection. FCC limits country selection to United States and IC limits country
selection to Canada. If a country provides access to more than one regulatory band, PTP 550
provides a choice between the available bands. In each regulatory band, PTP 550 sets the
following aspects of wireless operation to comply with the applicable regulations (based on
regional variant and configuration of the Country parameter):
•
Maximum transmit power
•
Radar avoidance
•
Transmit power reduction in edge channels
•
Frequency range
•
Channel plan
Dual-channel Conducted Transmit Power Constraints
The conducted transmission power of each PTP 550 radio complies with the following
constraints:
•
If both radios are configured in the same sub-band then the maximum transmit power of
both radios is adjusted down to reduce interference and ensure compliance with applicable
EIRP regulations:
o
For sub-bands 5.1, 5.2, 5.3, and 5.4 GHz the maximum configurable transmit power
of each radio is reduced by 3 dBm