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Echo > E-test-3 > Flashcards

E-test-3 Flashcards

1
Q

Define Multiplexing

A

Process that combines multiple channels or circuits onto one signal or trunk/aggregate for transmission

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2
Q

Define Overhead

A

Overhead is all the information -control, routing and error-checking characters -that is added in addition to user-transmitted data for quality control

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3
Q

Define Time Division Multiplexing

A

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

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4
Q

ID the operational configuration in which the Tactical Access Concentrator 300 (TAC-300) can be employed within a communications network

A

Can only be employed in a point-to-point configuration with other ATM multiplexers

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5
Q

ID the maximum number of circuits (port inputs) by type that the TAC-300 can accept

A
  • 8 circuits

- (4 high speed serial and 4 T1s)

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6
Q

Define Asynchronous Transfer Mode (ATM)

A

High bandwidth, low-delay, connection-oriented, switching and multiplexing technique that allows the seamless end-to-end transmission of voice, data and video traffic

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7
Q

Define Permanent Virtual Circuit (PVC)

A
  • Static connection between two ATM ports

- Only method used in the Marine Corps

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8
Q

Define the purpose of the 4-port High Speed Serial CES Interface Protocol Option Device (IPOD)

A
  • 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
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9
Q

Define the purpose of the Circuit Emulation Quad DS1 Interface Protocol Option Device (IPOD)

A
  • 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
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10
Q

Define the purpose of the Serial ATM Expansion Protocol Option Device (XPOD)

A
  • 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
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11
Q

ID the communications symbol used to represent the TAC-300

A

TAC-300 6 sided pentagon?

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12
Q

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)

A

.

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13
Q

Define Symmetric/Asymmetric Trunk (SA-TRK)

A
  • Medium by which a call leaves the node and enters the network
  • Supports efficient transport of one-way and two-way calls between nodes
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14
Q

Define network employment configurations available while employing a Promina-based multiplexer

A

Promina based multiplexer networks can be established in a point-to-multipoint configuration

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15
Q

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

A

3

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16
Q

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

A

10

17
Q

Define the number of Symmetric/Asymmetric Trunks that the AN-TTQ-5 DITS can process with its standard Primary Rate Card (PRC)complement

A

6

18
Q

Define the number of Symmetric/Asymmetric Trunks that the AN-TTQ-5 DITS can process with its standard Symmetric/Asymmetric Trunk (SA-TRK) cardcomplement

A

3

19
Q

ID the appropriate communications symbol used to represent a Promina multiplexing system

A

8 sided P400DS D_N_

20
Q

PVS-12 - T1 - 3

High Speed Data-2B card 10

Primary Rate Card - SA Trunks 6

Symmetric/Asymmetric Trunk (SA-TRK) - SA trunks - 3

A

.

21
Q

Define the purpose of Communications Control (COMMCON)

A
  • 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
22
Q

ID the 3 functional areas comprising COMMCON

A
  • Systems Planning and Engineering (SPE)
  • Operational systems control (SYSCON)
  • Technical Control (TECHCON)
23
Q

ID the primary function of each of the three functional areas comprising COMMCON

A

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

24
Q

ID how to convert between volt-amperes and watts when operating tactical generators

A

True Power (Watts) = Apparent Power (Volt-Amperes) x Power Factor

25
Q

ID the types of output phases used in tactical generators

A
  • Single-phase

- Three-phase

26
Q

ID the voltages associated with the two types of output phases used in tactical generators

A
  • Single-phase 120 Volts

- Three-phase 208 Volts

27
Q

ID the benefits of using a 3-phase generator

A
  • 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
28
Q

State the four utilities MOS that directly relate to power planner

A
  • 1141 (Pvt-Sgt) Electrician
  • 1142 (Pvt-Sgt) Engineer Equipment Electrical Systems Technician (Generator Mechanic)
  • 1169 (GySgt-MGySgt) Utilities Chief
  • 1120 (WO-CWO5) Utilities Officer
29
Q

ID the two most common locations to find electrical power requirements for communications equipment

A
  • Read that data plate located on the piece of equipment in question
  • Check the equipment’s technical manual to find electrical ratings
30
Q

ID the metric used to measure power output in tactical generators

A

Kilowatts (kW)

31
Q

ID the two electrical frequencies (Hz) used in tactical generators

A
  • 50 Hz

- 60 Hz

32
Q

ID the purpose of the Mobile Electric Power Distribution System (MEPDIS)

A

Provide fast, mobile and safe means of installing an electrical distribution system

33
Q

State how to configure signal and power cables if their paths must cross

A
  • Right angles

- 2 feet of separation

34
Q

State which generators in the USMC are capable of being employed in parallel

A

All generators rated at 30kW and above

35
Q

State the optimum percent utilization for tactical generators when employed in parallel

A

Between 30% and 40% (when employed in parallel)

Echo (3 decks)

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