Chapter 1: Product description
Wireless operation
Note
Fixed frequency allocation is not recommended in radar avoidance regions, as any
radar detection would cause a system outage of at least 30 minutes.
Encryption
The PTP 650 supports optional encryption for data transmitted over the wireless link. The
encryption algorithm used is the Advanced Encryption Standard (AES) with 128-bit and 256-bit key
size. AES is a symmetric encryption algorithm approved by U.S. Government organizations (and
others) to protect sensitive information. The AES implementation in PTP 650 is approved to FIPS-
197. Encryption is enabled through the purchase of an upgrade.
License keys and regulatory bands
The PTP 650 license key specifies the country of operation for the ODU, and lists the regulatory
bands that are licensed by regulators in that country. If a license key provides access to more than
one regulatory band, PTP 650 provides a choice between the available bands. In each regulatory
band, PTP 650 sets the following aspects of wireless operation to comply with the applicable
regulations:
•
Maximum transmit power
•
Radar avoidance
•
Transmit power reduction in edge channels
•
Frequency range
•
Channel plan
The country of operation (and thus the supported regulatory bands) can be changed by generating
a new license key at the License Key Generator page of the Cambium web-site, and entering the
new license key using the Installation Wizard.
Caution
To avoid possible enforcement action by the country regulator, always operate links in
accordance with local regulations.
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