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
The PTP 700 uses a Web Interface GUI to perform link establishment procedures. To accomplish this, you type the IP address of the unit into the address bar of a web browser on a computer connected to the PTP-700. The factory default IP addresses for these units are…?
169.254.1.1 and 169.254.1.2
The GUI/antenna using the 1.1 IP is the ___ (primary) node, while the
GUI/antenna using the 1.2 IP is the ___ (secondary) node.
master
slave
The PTP 700 can be configured by the user to operate in ___different frequency bands.
six
4.7 GHz band:
4400 MHz to 5000 MHz
4.9 GHz band:
4940 MHz to 4990 MHz
5.1 GHz band:
5150 MHz to 5250 MHz
5.2 GHz band:
5250 MHz to 5350 MHz
5.4 GHz band:
5470 MHz to 5725 MHz
5.8 GHz band:
5725 MHz to 5875 MHz
The PTP-700 can transport data over the wireless link using several different modulation modes, ranging from ___ to ___.
256QAM
BPSK
The PTP topology provides Ethernet bridging over a point-to-point wireless link consisting of one outdoor unit (ODU) configured as a TDD ___, and one ODU configured as a TDD ___.
master
slave
The optional HCMP topology provides Ethernet bridging over a star of individual point-to-point wireless links connecting one (1) ODU configured as a TDD Master with up to ___ODUs configured as TDD Slaves.
eight
The ODU emits ___ ___ during installation to assist with alignment.
audible tones
The pitch of the alignment tone is ___ to the received power of the wireless signals.
proportional
You will have to adjust the alignment of the unit in both ___ and ___ until the highest pitch tone is achieved.
azimuth
elevation
The term “___ ___” refers to that of the peer unit being installed.
wanted signal
Once the “wanted signal” is achieved you will ___ the units and ___ ___ the audible alignment aid.
disarm
tun off
Traditionally the Tilt Bracket Assembly and Mounting Bracket (Integrated) are used to mount a PTP-700 ODU on a ___ with a diameter in the range 40 mm to 80 mm (1.6 inches to 3.1 inches).
pole
The PTP-700 Series ODU has three (3) Ethernet ports:
*Main Power Supply Unit (PSU): The Main PSU port provides a copper Ethernet interface for 100BASE-TX and 1000BASE-T, and accepts power from the AC+DC Enhanced Power Injector 56V or the Cluster Management Module (CMM5) to the ODU using a proprietary power over Ethernet (PoE) method.
*Aux Port: The Aux port provides a copper Ethernet interface for 100BASE-TX and 1000BASE-T, and supplies power from the ODU to external equipment using standards- based power over Ethernet (PoE) complying with IEEE 802.3at.
*SFP Port: The SFP port is a small format pluggable receptacle accepting copper or optical plug-in modules supplied as part of the SFP module kit.
The primary Ethernet port that you will be using in this module, to interface the GUI/Laptop with the 2 ft flat plate antenna, is the ___ ___ ___.
Main PSU port
The ___ is an indoor unit that is connected to the ODU and network terminating equipment using a Cat5e cable with RJ45 connectors. It is also plugged into an AC or DC power supply so that it can inject Power over Ethernet (POE) into the ODU.
PSU
When it comes to the GUI, the PTP ___ ___ provides a system summary of the current link statistics and connection availability. The link name, elapsed time indicator, and system clock are also displayed.
home screen
When it comes to the GUI, the PTP Alarms page displays outstanding alarms that have the potential to affect services provided by the unit. When the PTP-700 indicates an alarm status it is annotated by displaying a ___ in the navigation bar. This indicator is visible from all web pages in the GUI.
yellow triangle with an exclamation point
Table 172 of the PTP-700 Series User Guide details all possible system alarms and their definitions. Some of the more common alarms you might encounter when installing this system are:
- Install Status
- Install Arm State
- Incompatible Master and Slave
- Link Mode Optimization Mismatch
This beep indicates the PTP-700 is executing a band scan.
Free Channel Search (Regular beep)
The PTP-700 is not demodulating a wanted signal.
Scanning (Slow broken tone)
The PTP-700 is demodulating a wanted signal.
Synchronized (Fast broken tone)
A beep that indicates both PTP-700 units are exchanging radio layer Media Access Control (MAC) management messages.
Registered (Solid tone)
The PTP-700 also provides physical indicators that provide system indicators for the hardware side of the unit. These ___ ___ are located on the PTP-SYNC or GPS modules of the PTP-700.
LED indicators
The following describes which LED system indicator?
o Off: No satellite data is being received at GPS Port.
o On steady or blink: GPS satellite data is being received.
GPS LED
The following describes which LED system indicator?
o Off: No power.
o On steady: Power but no lock.
o Blink: Power and satellite lock at GPS/SYNC IN or 1PPS IN port.
STATUS LED
The following describes which LED system indicator?
o Off: No signal being received from ODU.
o On: Communication with ODU is established.
o Blink red: Error in communication with ODU.
Outdoor Unit (ODU)
Operates between what temperature range?
-40F to 140F
Power input is…?
90-264V AC or 37-60V DC
