Podcast
Questions and Answers
Local CO switches are connected in a star topology to a ____
Local CO switches are connected in a star topology to a ____
CO switches can be directly trunked to each other.
CO switches can be directly trunked to each other.
True
If a telephone call passes from one local service area to another, it is a ____________.
If a telephone call passes from one local service area to another, it is a ____________.
Long-distance call
The local tandem switch will hand off a long distance call to its ____.
The local tandem switch will hand off a long distance call to its ____.
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The bottom-most telephone switch in the switching hierarchy is the __________.
The bottom-most telephone switch in the switching hierarchy is the __________.
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As a general rule, only a class 5 switch provides dial tone.
As a general rule, only a class 5 switch provides dial tone.
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In the switching hierarchy, a class 1 switch is a ____.
In the switching hierarchy, a class 1 switch is a ____.
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In the switching hierarchy, a class 2 switch is a ____.
In the switching hierarchy, a class 2 switch is a ____.
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In the switching hierarchy, a class 3 switch is a ____.
In the switching hierarchy, a class 3 switch is a ____.
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In the switching hierarchy, a class 4 switch is a ____.
In the switching hierarchy, a class 4 switch is a ____.
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In the switching hierarchy, a class 5 switch is a ____.
In the switching hierarchy, a class 5 switch is a ____.
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A superior control and routing decision architecture called _______ has been in service since the 1980's.
A superior control and routing decision architecture called _______ has been in service since the 1980's.
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A telecommunications network has three main parts: select all that apply.
A telecommunications network has three main parts: select all that apply.
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Another term for the Access Network is the _______________.
Another term for the Access Network is the _______________.
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F1 cables are buried underground because _________________
F1 cables are buried underground because _________________
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Telecommunication Cabinets are also called:
Telecommunication Cabinets are also called:
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F1 cables cross connect to _________ in the SAI.
F1 cables cross connect to _________ in the SAI.
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A Jumper Wire Interface (JWI) is a type of OPI.
A Jumper Wire Interface (JWI) is a type of OPI.
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The wiring device that performs the demarc function is the ___________.
The wiring device that performs the demarc function is the ___________.
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The analog electrical signal is filtered to be in a frequency range from 300 Hz to 3300 Hz referred to as the ________________.
The analog electrical signal is filtered to be in a frequency range from 300 Hz to 3300 Hz referred to as the ________________.
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The two commonly available ISDN services are (Pick two).
The two commonly available ISDN services are (Pick two).
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Each 'B' channel in an ISDN circuit operates at __________.
Each 'B' channel in an ISDN circuit operates at __________.
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DSL access is not available everywhere - it depends on the ____________.
DSL access is not available everywhere - it depends on the ____________.
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A _____________ splits off the data portion to a high-speed data network, and passes the voice band to the CO Switch.
A _____________ splits off the data portion to a high-speed data network, and passes the voice band to the CO Switch.
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The Telecom Transport Network connects _______________
The Telecom Transport Network connects _______________
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4-(and sometimes 6 or 8) wire trunks are called _______ trunks (choose all that apply).
4-(and sometimes 6 or 8) wire trunks are called _______ trunks (choose all that apply).
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An analogue trunk can carry only one duplex conversation at a time.
An analogue trunk can carry only one duplex conversation at a time.
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The technology where each conversation is assigned a different, non-overlapping frequency range is called __________.
The technology where each conversation is assigned a different, non-overlapping frequency range is called __________.
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According to the Nyquist Theory, a signal whose maximum frequency is 4000 Hz requires ________ samples per second in order to accurately reconstruct the signal.
According to the Nyquist Theory, a signal whose maximum frequency is 4000 Hz requires ________ samples per second in order to accurately reconstruct the signal.
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Each Bearer channel of a PRI operates at 64Kbps because _________.
Each Bearer channel of a PRI operates at 64Kbps because _________.
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Telecommunications carriers use single DS0s in their transmission networks.
Telecommunications carriers use single DS0s in their transmission networks.
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Pick the one statement that is completely correct.
Pick the one statement that is completely correct.
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TDM is an acronym for ____.
TDM is an acronym for ____.
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The number of DS0s in a T1 TDM frame are ____.
The number of DS0s in a T1 TDM frame are ____.
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Pick the one piece of equipment not essential to the operation of a CO.
Pick the one piece of equipment not essential to the operation of a CO.
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CO equipment is designed to operate on ____.
CO equipment is designed to operate on ____.
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The purpose of the CO Air compressor is ____.
The purpose of the CO Air compressor is ____.
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F1 cables enter and exit the CO by the way of ____.
F1 cables enter and exit the CO by the way of ____.
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Pick the one correct statement.
Pick the one correct statement.
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Riser cables are connected to F1 cables in the ____________.
Riser cables are connected to F1 cables in the ____________.
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The __________ provides the point of cross-connection between the Outside Plant (OSP) cable pairs and the office equipment (switch).
The __________ provides the point of cross-connection between the Outside Plant (OSP) cable pairs and the office equipment (switch).
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The side of the MDF that faces the switch is referred to as ___________________.
The side of the MDF that faces the switch is referred to as ___________________.
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Small interface units called _______ provide the circuitry to connect the live (loop) to the bus and backplane architecture of the switch.
Small interface units called _______ provide the circuitry to connect the live (loop) to the bus and backplane architecture of the switch.
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Historically, the telco owned all of the telephone wiring inside the customer premise.
Historically, the telco owned all of the telephone wiring inside the customer premise.
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Historically, the subscriber was not allowed to make any modifications to the inside wiring, including adding new jacks or telephones. This is still true today.
Historically, the subscriber was not allowed to make any modifications to the inside wiring, including adding new jacks or telephones. This is still true today.
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Modern datacom cable, such as Cat5, Cat5e and Cat6 are acceptable for use as telephone inside wiring.
Modern datacom cable, such as Cat5, Cat5e and Cat6 are acceptable for use as telephone inside wiring.
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Twisting pairs of wire together inside the inside wiring cable _______.
Twisting pairs of wire together inside the inside wiring cable _______.
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Each connection where another phone is connected to the loop is called a ________.
Each connection where another phone is connected to the loop is called a ________.
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Each telephone set has an associated electrical measurement called a ________.
Each telephone set has an associated electrical measurement called a ________.
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The number of standard telephone sets on a POTS loop should not exceed ____.
The number of standard telephone sets on a POTS loop should not exceed ____.
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If there are too many telephone sets on a POTS loop, then ____.
If there are too many telephone sets on a POTS loop, then ____.
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Inside wiring cables that pass through enclosed ceilings must be ____ in order to meet fire regulations.
Inside wiring cables that pass through enclosed ceilings must be ____ in order to meet fire regulations.
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Fire stopping is intended to ____.
Fire stopping is intended to ____.
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The Telco Building Entrance is ____.
The Telco Building Entrance is ____.
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The service provider terminates the cables brought through the building entrance utilizing ______ protection (pick 2).
The service provider terminates the cables brought through the building entrance utilizing ______ protection (pick 2).
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Pick all of the devices where the distribution of dial tone in a building could start.
Pick all of the devices where the distribution of dial tone in a building could start.
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The central point in a building where all cables converge is the ____.
The central point in a building where all cables converge is the ____.
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The ________ connects other floors' (IDF/TC's) of a multiple floor building to the MDF.
The ________ connects other floors' (IDF/TC's) of a multiple floor building to the MDF.
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The ________ extends telecom services on the same floor to the other sections of a building (as with single floor complexes).
The ________ extends telecom services on the same floor to the other sections of a building (as with single floor complexes).
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USOC is an acronym for ____.
USOC is an acronym for ____.
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In telecommunications, calls being handled by a switching system are referred to as ____.
In telecommunications, calls being handled by a switching system are referred to as ____.
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The percent of time the server is working (carrying traffic) as opposed to waiting for a call is defined as (choose all that apply).
The percent of time the server is working (carrying traffic) as opposed to waiting for a call is defined as (choose all that apply).
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If an inbound call to a PBX encounters a busy signal or no answer, the call is said to be ____.
If an inbound call to a PBX encounters a busy signal or no answer, the call is said to be ____.
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In Traffic Engineering, the time shown on a billing report is called the ____.
In Traffic Engineering, the time shown on a billing report is called the ____.
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Which of the following is not a factor that determines switch capacity?
Which of the following is not a factor that determines switch capacity?
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What factor does not influence operating time?
What factor does not influence operating time?
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Study Notes
Local CO Switches and Tandem Switches
- Local CO switches are connected to tandem switches in a star topology.
- Tandem switches facilitate interconnection between different local service areas.
Call Types
- A long-distance call occurs when a telephone conversation crosses local service area boundaries.
- CO switches can directly trunk with one another, allowing direct communication paths.
Switching Hierarchy
- Class 5 switches function as access switches and are the lowest level in the switching hierarchy.
- The hierarchy includes various classes:
- Class 1: Regional switch
- Class 2: Section switch
- Class 3: Primary center switch
- Class 4: Toll center switch
ISDN Services
- Two main ISDN services are BRI (Basic Rate Interface) and PRI (Primary Rate Interface), with each "B" channel operating at 64 Kbps.
DSL and Network Connectivity
- DSL access availability depends on loop reach, which refers to the distance broadband signals can reliably travel.
- DSLAM (Digital Subscriber Line Access Multiplexer) splits data from voice signals to connect to high-speed data networks.
Cable and Wiring Standards
- F1 cables are buried due to their heaviness, which makes them unsuitable for pole suspension.
- Plenum grade cables are required for fire regulations in enclosed ceiling spaces.
Network Interface and Demarcation Points
- NID (Network Interface Device) serves as the demarcation point between telecommunications service and customer wiring.
- Jumper Wire Interfaces (JWI) are used as outside plant interfaces for connectivity to switches.
Telecommunications Infrastructure
- The Main Distribution Frame (MDF) is crucial as it provides the cross-connection point between outside plant cables and office equipment.
- Riser cables connect different floors' telecommunications infrastructure to the MDF.
Signal Processing and Multiplexing
- Voice signals are typically filtered within a frequency range of 300 Hz to 3300 Hz, known as the voiceband.
- Frequency Division Multiplexing (FDM) assigns non-overlapping frequency ranges for simultaneous conversations.
Fire Safety and Building Codes
- Fire stopping techniques are vital to prevent the spread of fire and smoke across different building areas.
- The Telco Building Entrance represents where telephone cables enter a structure from outside.
Traffic Engineering Concepts
- The efficiency of a system is determined by the percentage of time it is actively carrying traffic versus idle time.
- Inbound calls that cannot connect due to busy signals or no answers are categorized as blocked calls.
Historical Perspective on Telecommunications
- Historically, telecommunication providers owned all wiring within customer premises; regulations have since evolved allowing modifications.
- Modern data communication cables (Cat5, Cat6) are acceptable for use as inside wiring.
Miscellaneous
- The term "traffic" in telecommunications refers to the volume of calls handled by the switching system.
- Occupancy measures the use of a system, indicating the proportion of time it's engaged with active calls.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge of telephony concepts with these flashcards. The quiz covers essential terms related to CO switches, local switches, and call processing. Ideal for students and professionals in telecommunications.
