12.6 A 24-channel trunk group is divided into two groups of 12 one-way trunks in each direction. (A one-way trunk is one that can only be seized at one end.) How many erlangs of traffic can this system support at 0.5% blocking? How many erlangs can be supported if all 24 trunks are two-way trunks? (That is, every trunk can be seized at either end.)

solve 1,2,3

14.a. Which test can be used to measure splice loss?A. Tensile measurementB. OTDRC. Bit error rate testD. Continuity test14.b. Which type of fiber optic cable is usually supplied with an attached connector?A. Patch cordB. Tight-buffered cableC. Loose-tube armored cableD. Standard loose-tube cable14.a. Which of the following features would usually be found in direct-burial cable but not in overhead cable?A. Steel armorB. Strength membersC. Outer jacketD. Fiber housing

QUESTION 20 topology networks provide redundancy because each device has_ - paths. QUESTION 21 topology uses a "hub-and-spoke" design. Each device only requires_ cable connection. QUESTION 22 cables use lights waves to transmit data. cable has a braided copper shield. QUESTION 23 A network _ selectively forwards data packs to their proper destination. A network_ performs conversions from one protocol format to another

I need help answering question 4

A Type NM cable carries a branch circuit to the outside of a building, where it terminates in a metal weatherproof junction box. From this box, a short length of EMT is installed upward to another metal weatherproof junction box on which is attached a cluster of outdoor floodlights. The first box is located approximately 24 in. (600 mm) above the ground. To Meet Code, do the metal boxes and metal raceway have to be grounded? Yes _______________ No _______________ NEC _______________.

Apart from special orders, feeder busway sections come in standard_-foot lengths. A. 6 B.8 C.10 D. 12

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Explain the importance of return loss in transmission cabling and its effects on network performance.