Frequently Asked Questions - Motorola 5701BHDD - Canopy PTP 58100 Lite User Manual

Frequently Asked Questions

1. What interference mitigation techniques are used in the pTp 300, 400, 500 and 600 Series radios?
The Motorola PTP 300, 400, 500 and 600 Series radios deliver optimal network performance in challenging
environments by uniquely combining five mitigation techniques including: dual polarized antennas, Multiple-
Input Multiple-Output (MIMO), intelligent Orthogonal Frequency Division Multiplexing (i-OFDM), Adaptive
Modulation and Advanced Spectrum Management with intelligent Dynamic Frequency Selection (i-DFS).
In addition, the PTP 600 radios add Time Division Duplex (TDD) Synchronization, enabling frequency reuse
to permit collocation of multiple radios on a single rooftop or tower with greatly reduced interference.
Because PTP 300, 400, 500 and 600 radios use less channel width than many comparable systems, they
minimize the risk for RF interference and boost performance in noisy environments.
. What throughput do I get at maximum range?
The unique design of the Motorola PTP 300, 400, 500 and 600 Series radios combats interference (leading
to higher throughput) while maximizing signal range (through high system gain). Operating range and data
throughput of wireless communications are dependent on conditions. The systems can support up to
6 miles (10 km) non-line-of-sight, up to 25 miles (40 km) near-line-of-sight and up to 155 miles (250 km)
line-of-sight. In the PTP 300 Series, the PTP 54300 and 58300 systems provide up to 25 Mbps. Within
the PTP 400 family of systems, up to 21 Mbps is the maximum throughput for the PTP 54400 Lite, up to
43 Mbps for the PTP 54400, up to 17 Mbps for the PTP 49400 Lite and up to 35 Mbps for the PTP 49400.
In the PTP 500 Series, the PTP 54500 and PTP 58500 Lite systems provide up to 52 Mbps while the
PTP 54500 and 58500 full-speed models deliver up to 105 Mbps. Within the PTP 600 family of solutions,
maximum data rates vary between 41 Mbps and 300 Mbps based on the model and channel size selected.
To best estimate throughput incorporating topographic variances and obstructions, Motorola provides link
planning tools that will project case-specific link performance performance estimates. The PTP LINKPlanner
software can be downloaded at www.motorola.com/ptp.
3. How do the pTp 300, 400, 500 and 600 Series bridges provide security for data traffic?
In order to ensure secure transmission, each PTP 300, 400, 500 and 600 Series radio is pre-programmed to
communicate only with a user-configured matched radio. At installation, each link is programmed with the
MAC and IP address of its partner. Then the two ends of the link will communicate only with each other,
greatly reducing the risk of "man in the middle" attacks. The pre-pairing also allows fast deployment as all
that is needed is power for the modules to start searching for each other. Over-the-air security is achieved
through a proprietary scrambling mechanism that cannot be disabled or spoofed by commercial tools. Plus
an additional layer of security can be applied with FIPS-197 compliant, 128-bit and 256-bit AES Encryption
(optional).
4. What comprises the pTp 300, 400, 500 and 600 solutions' built-in proprietary over-the-air
security features?
The unique combination of security techniques (scrambling and matched radios) provides excellent
over-the-air security for the network. Each matched pair employs a built-in complex proprietary signal
with scrambling applied to give an added security layer that protects the data being transmitted. On the
transmission, the signal passes through the following processes:
1) Reed Solomon forward error correction where added bits are applied
2) Scrambling with a code that repeats every eight Reed Solomon code words (about 1 ms)
3) Interleaver where the signal is then changed in order
4) Convolutional Encoding where the signal is scrambled into two streams and then sent serially with
some bits unsent
5) Then the signal is coded onto one of BPSK, QPSK, 16 QAM, 64 QAM or 256 QAM waveforms
6) Then the signal is interleaved across a 1024-carrier OFDM waveform
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PTP SOLUTIONS GUIDE