1A-2C Flashcards
In a tactical network environment, sometimes we need to extend our capabilities beyond the local area. To accomplish this, we might use a long-range fiber connection, or a…?
Line-of-Sight Microwave transmission
Cambium PTP 700 Line-of-Site (LOS) Microwave Systems are designed for Ethernet bridging over physically separated point-to-point (PTP) and high-capacity multipoint (HCMP) microwave
links that operate in the frequency bands between…?
4,400 MHz and 5,875 MHz (4.4 GHz and 5.875 GHz).
The PTP 700 Series acts as a transparent ___ between two or more segments of the operator’s network. In this sense, it can be treated as a virtual wired connection between two or more points.
bridge
The PTP 700 Series forwards ___ ___ ___ destined for other parts of the network and filters frames it does not need to forward.
802.3 Ethernet frames
This system is transparent to higher-level protocols such as Virtual Local Area Networks (VLANs) and Spanning Tree.
PTP 700 Series
The PTP-700 is a quick deployable, long range microwave radio system that possesses a maximum high-performance throughput of ___ Mbps in a nominal environment.
450 Mbps
The system is capable of functioning in LOS, near-LOS, and non-LOS radio frequency propagation configurations with a maximum range of ___.
250 km (155 miles)
The PTP 700 series supports a maximum ___ MHz channel bandwidth.
45
The PTP-700 utilizes an external antenna that might take the shape of a parabolic dish, but the PTP-700 can also connect to an integrated flat plate antenna that has ___ dBi of gain.
22 dBi
A typical PTP link consists of one (1) outdoor unit (ODU) that acts as ___, and the distant end ODU is configured as ___.
primary
secondary
In this configuration, the Primary functions as the ___, controlling the
link while the Secondary is in a ___ state.
hub
passive
Both Primary and Secondary systems utilize a Web- based graphical user interface (GUI) connected through a CAT5 Ethernet connection to control, monitor and manage operations; this is the ___ means of communication with the PTP- 700.
only
When mounted on a structure, the PTP-700 ODU and its mounting bracket can withstand wind speeds of up to…?
325 kph (200 mph)
If link encryption is required for communications, the PTP-700 can support up to ___-bit encryption.
256-bit
The types of encryption available for this system are listed below:
- TLS-RSA—Only provides authentication and authorization, not encryption.
- TLS-PSK 128-bit—Provides authentication, authorization and encryption using 128-bit pre-shared key.
- TLS-PSK 256-bit—Provides authentication, authorization and encryption using 256-bit pre-shared key.
Power to the PTP-700 is provided ___ a Direct Current (DC) power interface or an Alternating Current (AC) power interface.
either
The PSU should be located in an area that does not have the potential for condensation or flooding conditions. Additionally, the PSU should be located in an area that does not exceed the PSU’s operational ___ ___.
temperature rating
Since the PTP-700 operates in a LOS configuration, any obstacles that ___ ___ ___ of the distant end will cause connectivity issues. Sometimes these obstacles are permanent structures, such as a building or a tree, and relocation of the unit might be necessary.
obstruct the view
Like any RF equipment, the PTP-700 is subject to performance and connectivity issues due to what three things?
obstacles
weather conditions
electromagnetic interference (EMI)
During ___ ___ configurations, inclement weather might affect the signal strength being produced by the unit. The Commercial Off the Shelf (COTS) manual describes decreasing the modulation scheme if this becomes a problem. However, the decrease in modulation can affect link efficiency when passing information over microwave communications.
high modulation
Lastly, due to the potential for the PTP-700 to operate in unlicensed frequency bands, there is a considerable chance for ___. To counteract this, the unit employs a Spectrum Management tool
to create a graphical representation of frequencies that might be congested within a certain area.
EMI
Also, ___ could be a potential limiting factor due to the single point of connection through the web-based interface. If this interface was to become compromised, it would be difficult to operate or monitor the LOS channel.
hardware
