E-test-3 Flashcards
Define Multiplexing
Process that combines multiple channels or circuits onto one signal or trunk/aggregate for transmission
Define Overhead
Overhead is all the information -control, routing and error-checking characters -that is added in addition to user-transmitted data for quality control
Define Time Division Multiplexing
Means of obtaining a number of circuits over a single path by dividing the path into a number of time slots and assigning each channel its own intermittently repeated time slot
ID the operational configuration in which the Tactical Access Concentrator 300 (TAC-300) can be employed within a communications network
Can only be employed in a point-to-point configuration with other ATM multiplexers
ID the maximum number of circuits (port inputs) by type that the TAC-300 can accept
- 8 circuits
- (4 high speed serial and 4 T1s)
Define Asynchronous Transfer Mode (ATM)
High bandwidth, low-delay, connection-oriented, switching and multiplexing technique that allows the seamless end-to-end transmission of voice, data and video traffic
Define Permanent Virtual Circuit (PVC)
- Static connection between two ATM ports
- Only method used in the Marine Corps
Define the purpose of the 4-port High Speed Serial CES Interface Protocol Option Device (IPOD)
- Provides connectivity for four EIA-530A DB-25 interfaces for Constant Bit Rate (CBR) serial connections at rates up to 20 Mbps port port
- Serial services such as VX-900, NIPRNET, SIPRNET circuits will utilize the HS CES IPOD
Define the purpose of the Circuit Emulation Quad DS1 Interface Protocol Option Device (IPOD)
- DS1 ports accept input from devices connected with RJ-45 connector terminated cables
- Each port supports up to 1.544 Mbps bandwidth, equivalent of a T1 connection
Define the purpose of the Serial ATM Expansion Protocol Option Device (XPOD)
- Serial XPOD, a single ATM high density serial port, is the backbone for all data transferred to and from TAC-300.
- Serial ATM XPOD provides an ATM cell stream over an RS-422/EIA-530 serial interface
ID the communications symbol used to represent the TAC-300
TAC-300 6 sided pentagon?
Signal Flow:
Packets/Voice > IPOD > CPOD > XPOD > Aggregated ATM cell stream
IPODs receive data/voice
CPOD segments and combines data/voice
XPOD pushes out the multiplexed data
VPI Values = 0-15
VCI Values = 19-2047 (1-18 reserved for management)
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Define Symmetric/Asymmetric Trunk (SA-TRK)
- Medium by which a call leaves the node and enters the network
- Supports efficient transport of one-way and two-way calls between nodes
Define network employment configurations available while employing a Promina-based multiplexer
Promina based multiplexer networks can be established in a point-to-multipoint configuration
Define the number of T1s that the AN/TTQ-5 Deployable Integrated Transport Suite (DITS) can compress with its standard PrimeVoice Server (PVS-12) cardcomplement
3
Define the number of high speed data connections that the AN/TTQ-5 DITS can process with its standard High Speed Data-2B (HSD-2B) cardcomplement
10
Define the number of Symmetric/Asymmetric Trunks that the AN-TTQ-5 DITS can process with its standard Primary Rate Card (PRC)complement
6
Define the number of Symmetric/Asymmetric Trunks that the AN-TTQ-5 DITS can process with its standard Symmetric/Asymmetric Trunk (SA-TRK) cardcomplement
3
ID the appropriate communications symbol used to represent a Promina multiplexing system
8 sided P400DS D_N_
PVS-12 - T1 - 3
High Speed Data-2B card 10
Primary Rate Card - SA Trunks 6
Symmetric/Asymmetric Trunk (SA-TRK) - SA trunks - 3
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Define the purpose of Communications Control (COMMCON)
- COMMCON represents command and control of the network
- COMMCON process controls, through decentralized execution, the organization, direction, coordination, planning and employment of communications resources in order to PIOM a communication network responsive to MAGTF operational requirements
ID the 3 functional areas comprising COMMCON
- Systems Planning and Engineering (SPE)
- Operational systems control (SYSCON)
- Technical Control (TECHCON)
ID the primary function of each of the three functional areas comprising COMMCON
SPE
- Primary function of the MCCC
- Involves current and future operations as well as future plans in order to design, implement and responsively adjust communications networks to satisfy operational requirements
SYSCON
-Serves as the focal point for information regarding the health of the current network, maximizes the effectiveness of communications resources to meet operational demands and remedies deficiencies and outages
TECHCON
-The means of exercising decentralized, technical supervision and direction of the installation, operation and maintenance of communications links, circuits and systems
ID how to convert between volt-amperes and watts when operating tactical generators
True Power (Watts) = Apparent Power (Volt-Amperes) x Power Factor
ID the types of output phases used in tactical generators
- Single-phase
- Three-phase
ID the voltages associated with the two types of output phases used in tactical generators
- Single-phase 120 Volts
- Three-phase 208 Volts
ID the benefits of using a 3-phase generator
- A three-phase system is generally more economical than others because it uses less conductor material to transmit electric power vice the equivalent single-phase system at the same voltage
- Three-phase power distribution also provides better redundancy than single-phase
- Three-phase power is the most common method used by electric power distribution grids world wide to distribute power
State the four utilities MOS that directly relate to power planner
- 1141 (Pvt-Sgt) Electrician
- 1142 (Pvt-Sgt) Engineer Equipment Electrical Systems Technician (Generator Mechanic)
- 1169 (GySgt-MGySgt) Utilities Chief
- 1120 (WO-CWO5) Utilities Officer
ID the two most common locations to find electrical power requirements for communications equipment
- Read that data plate located on the piece of equipment in question
- Check the equipment’s technical manual to find electrical ratings
ID the metric used to measure power output in tactical generators
Kilowatts (kW)
ID the two electrical frequencies (Hz) used in tactical generators
- 50 Hz
- 60 Hz
ID the purpose of the Mobile Electric Power Distribution System (MEPDIS)
Provide fast, mobile and safe means of installing an electrical distribution system
State how to configure signal and power cables if their paths must cross
- Right angles
- 2 feet of separation
State which generators in the USMC are capable of being employed in parallel
All generators rated at 30kW and above
State the optimum percent utilization for tactical generators when employed in parallel
Between 30% and 40% (when employed in parallel)
