Chapter 1: Product description
Overview of the PTP 650
Overview of the PTP 650
This section introduces the key features, typical uses, product variants and components of the
PTP 650.
Purpose
Cambium PTP 650 Series Bridge products are designed for Ethernet bridging over point-to-point
microwave links in unlicensed and lightly-licensed frequency bands between 4.9 GHz and 5.8 GHz.
Users must ensure that the PTP 650 Series complies with local operating regulations.
The PTP 650 Series acts as a transparent bridge between two segments of the operator’s network.
In this sense, it can be treated as a virtual wired connection between two points. The PTP 650
Series forwards 802.3 Ethernet frames destined for the other part of the network and filters frames
it does not need to forward. The system is transparent to higher-level protocols such as VLANs
and Spanning Tree.
Key features
The PTP 650 is a high performance wireless bridge for Ethernet traffic with a maximum throughput
of 450 Mbps. It is capable of operating in line-of-sight (LOS), near-LOS and non-LOS propagation
condition. Its maximum LOS range is 200 km.
The PTP 650 operates in unlicensed and lightly-licensed frequency bands between 4.9 and 5.8 GHz.
It has a very high spectral efficiency of 10 bps/Hz and supports a channel bandwidth of up to
45 MHz. The integrated ODU has its own flat plate antenna. The connectorized ODU is designed for
use with an external antenna.
The wireless link is TDD based and supports both symmetric and asymmetric configurations.
From a network point-of-view, the PTP 650 wireless link is a transparent Layer 2 bridge. It supports
up to three Gigabit Ethernet ports. Two ports support twisted pair Gigabit Ethernet. One of them is
capable of providing power via standard 802.3at PoE to an external device such as a video
surveillance camera or a wireless access point. The third port accepts either a twisted pair or fibre
GE SFP module.
PTP 650 has extensive quality of service (QoS) classification capability and supports up to eight
levels of queues. Management of the unit may be via the same interface as the bridged traffic (in-
band management) or on a separate port (out-of-band local management).
gives a summary of the main PTP 650 characteristics.
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