block 4.txt

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  1. define communication
    Communication is a process by which information is exchanged through the use of a common system of symbols, signs, sounds, or behavior.
  2. four items required for successful communication:
    • transmitter
    • receiver
    • medium
    • language (protocol)
  3. two categories of communication signals
    • analog
    • digital
  4. which of the two communitcation signals is less susceptible to errors cause by noise
  5. what is the definition of the asynchronous communication method
    Communication that occurs without a required clocking mechanism or timing cycle
  6. what is the definition of the synchronous communication method
    Communication that occurs with a clocking mechanism or timing cycle
  7. which of the communication method is considered to be the fastest
    synchronous communication method
  8. what communication method requires timing coordination
  9. what communication method is considered a periodic signal
  10. what are the three communication modes
    • simplex
    • half duplex
    • full duplex
  11. differentiate between the three communication modes
    • simplex- supports transmission of data in only one direction between a transmitter and reciever
    • half duplex- supports transmission and reception of data, but not simultaneously
    • full duplex- supports simultaneous transmission and reception of data
  12. what does ISO stand for
    international Organization for Standardization
  13. what does ANSI stand for
    American National Standards Institute
  14. what does ICC stand for
    International Code Council
  15. what does IEEE stand for
    Institute of Electrical and Electronics Engineers
  16. what does NFPA stand for
    National Fire Protection Association
  17. what does NEMA stand for
    National Electrical Manufacturers Association
  18. what does UL stand for
    Underwriters Laboratories
  19. what does UTP stand for
    Unshielded Twisted Pair
  20. what is STP rated at
    150 ohms
  21. what is FTP rated at
    100 ohms
  22. what is ScTP rated at
    100 ohms
  23. what does STP stand for
    shielded twisted pair
  24. what does FTP stand for
    foil twisted pair
  25. what does ScTP stand for
    screened twisted pair
  26. what does EIA stand for
    electronic industries alliance
  27. what does TIA stand for
    telecommunication industry association
  28. what does BICSI stand for
    building industry consulting servcies international
  29. what gauge wire (AWG) is normally associated with Unshielded twisted pair (UTP) wiring
    24 AWG wires
  30. what are the colors of the wires contained in a four pair UTP cable
    • green and white/green
    • orange and white/orange
    • blue and white/blue
    • brown and white/brown
  31. how many ohms impedance is UTP normally rated at
    100 ohms
  32. what are the three forms of shielded twisted pair wiring
    • STP
    • FTP
    • ScTP
  33. what is the purpose of plenum cable
    In building construction, a plenum is a separate space provided for air circulation for heating, ventilation, and air-conditioning (sometimes referred to as HVAC) and typically provided in the space between the structural ceiling and a drop-down ceiling.
  34. what does POTS stand for
    plain old telephone service
  35. what does TSB stand for
    telecommunication system bulletin
  36. what is TSB
    document that provides recommendations for the new Cat 5 performance levels
  37. what type of twisted pair cable does cat 7 utilize
    • S/FTP
    • shielded twisted pair
  38. what are the three examples of air filled spaces
    • drop ceiling
    • crawl spaces
    • ventilation ducts
  39. cat 3 specs
    • 16 MHz
    • 10 Mbps
  40. cat 5 specs
    • 100 MHz
    • 100 Mbps
  41. cat 5e specs
    • 100 MHz
    • 1000 Mbps ( 1Gbps)
  42. cat 6 specs
    • 250 MHz
    • 1000 Mbps ( 1Gbps)
  43. cat 6a specs
    • 500 MHz
    • 1000 Mbps ( 1Gbps)
  44. cat 7 specs
    • 600 MHz
    • 10 Gbps
  45. cat 7a specs
    • 1000 MHz
    • 10 Gbps
  46. what does TAPI stand for
    Telephony Application Program Interface
  47. describe DTMF
    is the signal to the phone company that you generate when you press an ordinary telephone's touch keys.
  48. what is the definition of telephony
    Telephony is the technology associated with the electronic transmission of voice, fax, or other information between distant parties using systems historically associated with the telephone
  49. what does ISDN stand for
    intergrated services digital network
  50. what does DSL stand for
    digital subscriber line
  51. what services does POTS include
    • Bi-directional, or duplex, voice path with limited frequency range of 3003400Hz
    • Dial tone and ringing signals
    • Subscriber dialing
    • Operator services, such as directory assistance, long distance and conference calling assistance.
  52. what does PSTN stand for
    public switched telephone network
  53. what does IN stand for
    Intelligent network
  54. what PSTN services were introduced with IN
    • voice mail
    • caller ID
    • call waiting
    • reminder calls
    • three-way calling
    • enhanced 911
  55. what telecommunication device transmits and receives sound
  56. what is a local loop
    In telephony, the local loop (also referred to as a subscriber line) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider's network.
  57. what is the end office or central office switches
    A central office is the physical building used to house inside plant equipment including telephone switches.
  58. what is a trunk line
    A trunk or "trunk line" is a circuit connecting telephone switches and switchboards as distinguished from local loop circuits which extend from telephone exchange switching equipment to individual telephones or information origination/termination equipment.
  59. what does PBX stand for
    private branch exchange
  60. what device supports the IP protocol to connect phones using an ethernet or packet-switched LAN and sends its voice conversations in IP packets
    IP PBX
  61. what is a dial tone
    A dial tone is a telephony signal used to indicate that the telephone exchange is working, has recognized an off-hook, and is ready to accept a call.
  62. what does DTMF stand for
    dual tone multi-frequency
  63. what voltage is the ring connected to
    48 volts
  64. what is the tip connected to for safety
    the ground
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block 4.txt
2014-04-27 23:16:23

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