BICSI Installer 1, Top Questions and answers, 100% Accurate. Graded A+

BICSI Installer 1, Top Questions and answers, 100% Accurate. Graded A+ 25-pair color code - -White - Blue, orange, green, brown, slate Red - Blue, orange, green, brown, slate Black - Blue, orange, green, brown, slate Yellow - Blue, orange, green, brown, slate Violet - Blue, orange, green, brown, slate Fiber color code - -Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua NVP - -Nominal Velocity of Propagation Insertion loss - -The difference in the amount of power received before and after something is inserted into the circuit. Resistance - -Resistance is expressed in Ohms, and is the property of a conductor to resist the flow of electricity through it. V=IR Inductance - -Is a property of an electromagnetic field built around a conductor that opposes any change in the current flow in a circuit Capacitance - -is a property of conductors that allows storage of electric charges when potential differences exist between the conductors. Impedance (V) - -Total opposition of current flow measured in Ohms American Wire Gauge (AWG) - -A standard rating that indicates the diameter of a wire, such as the conducting core of a coaxial cable or the twisted pairs in a UTP cable. Megahertz (MHz) - -one million hertz, especially as a measure of the frequency of transmissions Megabit (Mb) - -Approximately one million bits. Often used as a measurement of data transfer throughput. Bandwidth - -The amount of data that can be transmitted over a network in a given amount of time. Decibel (dB) - -A unit used to compare the loudness of different sounds. Crosstalk - -when data bleeds from one pair to another in a cable Alien Crosstalk (AXT) - -Unwanted signal coupling from one permanent link to another USOC - -Universal Service Order Code Coaxial cable types - -Series-6 and Series-11 Coaxial connectors - -Series-6 uses BNC and F connectors Series-11 uses F and N connectors Fiber connectors - -SC, ST, and SST(LC or cladding - -The glass or plastic shield around the core of a fiber-optic cable. Cladding reflects light back to the core in patterns that vary depending on the transmission mode. This reflection allows fiber to bend around corners without impairing the light-based signal. Multimode Fiber (MMF) - -Larger core with multiple paths of light. Common for backbone and horizontal cabling in buildings. OM2 - Not recommended for new installs. OM3 - Higher bandwidth. OM4 - Highest bandwidth for MMF. 2000m/6500ft limitation. 850 nm and 1300 nm (nanometers) Singlemode Fiber - -Smaller core with only one path of lights. Horizontal, riser, campus environments. 9 um core, 125 um cladding. OS1 - LAN, tight buffered construction, 1310/1550 nm OS2 - Outside Plant, 1310, 1490, 1550, 1625 nm 3000m/9842ft limtations. Ribbon Fiber - -Multiple 250 um fibers bonded into a flat color coded ribbon. Can splice a bunch at a time. Fiber - Tight buffer diameter - -900 um Fiber - Acrylate coating diameter - -250 um OM1 - -850 nm OFL - 200 MHz•km (3.5dB/km) 1300 nm - 400 MHz•km (1.5dB/km) OM2 - -850 nm OFL - 500MHz•km (3.5dB/km) 1300nm - 500MHz•km (1.5dB/km) OM3 - -850 nm OFL - 1500MHz•km (3.5dB/km) 850 nm RFL - 2000MHz•km (3.5dB/km) 1300 nm - 500MHz•km (1.5dB/km) OM4 - -850 nm OFL - 3500MHz•km (3.5dB/km) 850 nm RFL - 4700MHz•km (3.5dB/km) 1300 nm - 500MHz•km (1.5dB/km) Modal Distortion - -A light distortion problem unique to MMF fiber-optic cable. Happens when light signals are sent at the same time. chromatic dispersion - -The broadening of a pulse due to different propagation velocities of the spectral components of the light pulse. Begins at the light source Modal Bandwidth is described in terms of... - -(MHz)(km) Ferrule Key Latching Mechanism - -flat or pre-radiused end assures consistent connector orientation within couplers locks in place Straight Tip (ST) - -One of the most common fiber-optic connectors, similar in style to the BNC connector in coax subscriber connector (SC) - -A square snap coupling for fiber-optic cable, about 2.5 mm wide, used for cable-to-cable connections or to connect cables to network devices. It latches with a push-pull action similar to audio and video jacks. Small Form Factor (SFF) - -LC and MU an example of array connectors... - -MPO Can terminate 6-72 optical fibers into a single ferrule Ohm's Law - -V=IR Typical balanced twisted pair cable - -100 Ohms UTP 4 pairs blue, orange, green, brown (tip/ring) 8P8C -B pinout - -White/orange Orange White/green Blue White/blue Green White/brown Brown Simplex - -A type of transmission in which signals may travel in only one direction over a medium. Half Duplex - -Communication between two devices whereby transmission takes place in only one direction at a time. Full Duplex - -Communication that happens in two directions at the same time. 1 cycle 60 cycles 1000 cycles 1 million cycles 1 billion cycles 1 trillion cycles - -1 Hz 60 Hz 1 KHz 1 MHz 1 GHz 1 THz Voltage, current, and amperes - -P(Power)=V(voltage) x I(Current) What is bandwidth expressed in - -analog frequencies (0Hz to 1MHz) AWG - -Smaller number - bigger wire Higher number - smaller wire A balanced twisted pair has... - -a nominal characteristic impedance of 100 Ohms A unbalanced coaxial cable has... - -a nominal characteristic impedance of 75 Ohms Category 3 Category 5e Category 6 Category 6A Category 8 - -16 MHz 100 MHz 250 MHz 500 MHz 2000 MHz 8P8C -A pinout - -White/green Green White/Orange Blue White/blue Orange White/brown Brown USOC RJ-61 pinout - -White/brown White/green White/orange Blue White/blue Orange Green Brown EF - -Entrance Facilities - telecommunications services entrance to the building. Underground, tunnel, buried, Aerial, and wireless ER - -Houses equipment that serves an entire building unlike a TR that serves a single floor TR - -Telecommunications room - serves one floor TE - -A TE is a subset of a TR that generally serves a limited space. NOT TO BE USED TO REPLACE A TR Normal rack height and width? - -7 feet tall and 19/23 inches wide Conduit fill ratio - -40 percent for new installation, not to exceed 60 percent J-hooks - -Typically used to hold up to 50 cables. Placed every 4-5 feet to support cable Surface Mount Box types - -Shallow, Standard, and Deep What are the six elements of professionalism listed in the ITSIMM - - An installer should _ in public, and _ in private - -Praise. Correct. Cabling installation companies are dependent on _ for new and repeat business - -Customers What are the percentages of communication perception? - -Body language - 55% Tone of voice - 38% Word choice - 7% What are three ways to minimize EMI? - -Using shielded cable (STP) Using fiber instead of copper Putting the cable in conduit (shielded pathway) 1 sine wave = _ - -1 Hz The number of cycles a signal is repeated in a given time period is defined as the _ - -Frequency 10,000 MHz = _ GHz - -10 An analog signal varies in what two aspects? - -amplitude and frequency What device converts a computers digital signals into 1s and 0s into two separate analog frequencies for transmission on a standard telephone line? - -Modem What type of coaxial cable is used for video in backbone distribution? - -Series 11 What type of BNC connector is not recommended for any install? - -Screw on What type of coaxial connector cannot be used with cables that have stranded center conductors? - -F connectors What type of construction allows the cable jacket to expand and contract with changes in temperature without affecting the fibers? - -Loose tube What are the two ways of coupling fibers? - -plug to plug plug to jack Hierarchy of codes, standards, and regulations - -AHJ Codes and regulations Standards Industry best practices Manufacturer instructions What are the two common depths for telecommunications racks? - -4 inch and 6 inch a _ conduit terminates in a vertical orientation - -stub-up a _ conduit terminates in a horizontal orientation - -stub-out