Block 10 Flashcards
Newer telephone systems
VOIP Voice over Internet protocol
ISDN integrated services digital
DSL digital subscriber line
Mobile cell phone phone
What encompasses the general use of equipment to provide voice communication over distances, with or w/o connecting wires?
Telephony
Which 3 mediums do sound transmit through
Solid
Liquid
Gas
What is the Most commons medium ?
Gas
The number of repetitions per second of a complete sound waveform is called ?
Frequency
What is frequency measured in ?
Hertz
All voice sounds are ___________.
Complex
The sound of the normal speaking voice contains fundamental frequencies between _______________.
300 and 3400 Hz
From the Standpoint of voice communication…. What are two very important qualities affect the design and construction of telephones, telephone lines and equipment…
Frequency &
Amplitude
What determines the vocal range (highest and lowest pitches that a person can produce).
Frequency
What is the fullness or quality of sound?
Amplitude
What are the two parts of the telephone designed to transmit and receive voice communication over telephone wires?
Transmitter and receiver
What converts sound waves into electrical waves
Transmitter
Converts electrical into sound waves and
where you hear the distant ends voice over telephone
Receiver
The physical path telecommunication circuits take from the central office to the customer location.
Telephone distribution system
Where do telephone lines originate from ?
Telephone switch
Each line is physically connected to the
Horizontal side of a (MDF)
The physical building used to house all the cabling and equipment ?
Central office
What are the two wires on A DC loop
Tip and ring
What is the limitation to the transmission of sound?
Distance
___________ contained in voice signals enable us to distinguish the voices of different people and to make the voice expressive of feelings such as gladness, sorrow, and anger.
Different harmonics
What does 16- 20,000 Hz refer to?
Total range of hearing
What frequencies are limited to 200- 2700 Hz
Ordinary conversation/ telephone
What does a telephone system include
- individual telephone
- outside plant cable
- telephone connection equipment
What connects telephone stations to a telephone exchange or interconnects another telephone exchange
Outside plant cable
___________ are special circuits that connect one exchange to another
(Another station around the world )
Trunks
When the telephone system was originally developed, the power source for each telephone was known as a ______________________
Local battery
When the telephone system originated, A __________ was used for the transmit energy and a ___________ ___________ was used to generate the AC signaling energy.
Battery
Crank generator
Most telephone system use a _____________ where batteries located at the central office provide all the battery and ground potentials needed to operate the network connected to that Co.
Common battery system
How many volts is the talk battery
-48 VDC
How many volts does it take to ring the ringer
90 VAC
What houses the primary source of power ? (Also known as the hub of all switching activities)
Central office
What are the two types of emergency power sources normally used by the central office ?
Storage batteries
Standby AC generator
When the handset of the telephone is resting in its cradle ..contacts of hook switch are open
(RIC) receiver in cradle
When you remove the handset from the cradle, hook switch contacts are closed.
(ROH) Receiver off hook
Older telephone sets use ___________ that sends dial pulses to the central office.
Rotary dials
Rotary dials open and close the local loop circuit at a __________.
Times rate
Touch- tone sets use _________ to send a telephone #.
DTMF) Dual tone multi-frequencies
What is the ringing signal/ voltage to activate the ringer on the called phone ?
90 VAC
What voltage establishes a talk path ?
-48 VDC
____________ gives you the ability to hear your own voice through the receiver.
Sidetone
What are the 6 major telephone components ?
Handset Network Hook switch Ringer Dial Housing
The part of the telephone that you talk and listen ? This is where the transmitting and receiving takes places .
Handset
Known as the heart of the telephone
Network
What does the network consist of
Resistors
Varistors
Capacitors
Transformer
All circuits of the telephone pass through the ________.
Network
The ____________ is called the on/off switch of the telephone.
Hook switch
Ringing voltage is
90 VAC
What protects the dial, hook switch, ringer and network ?
Housing
What are the 3 types of telephone ?
Single-line desk phone (2500)
Single-line wall phone (2554)
Multi-line (m5009) business set
This phone had the capacity to handle one central office line, connected to the wall jack by a mounting cord , also known as a line cord
Single-line desk phone 2500
This phone is Mounted on a wall and is used mainly as entry phones and in warehouses on most military installations..
Single line wall phone 2554
The basic digital telephone installed by cyber transport technicians ?
M5009
What are the basic features of a business set?
Automatic prime directory number selection
On hook dialing
Listen on hold
The fixed keys of a m5009
Call hold
Call release
Volume control
Dialing
What feature allows you to answer a coworkers incoming call from your telephone set
Call pickup
What are the four major subsystems of the digital voice switch ?
Supernode or supermodel SE
Maintenance and administration area
Network modules
Peripheral modules
What are the two most common digital voice systems
Supernode and Supernode SE
What are the two hardware elements that the SuperNode and SNSE have ?
DMS Core
DMS Bus
