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- (b) In a particular implementation of ADSL2+, 400 downstream subchannels are being used to achieve a data rate of 10.4 Mbit s-1. If 75 subchannels are using 1024-QAM, 125 are using 64-QAM and 100 are using 16-QAM, what modulation scheme must the remaining channels use, assuming they all use the same scheme? Show all your workingsWhich of the following is true for the Point of presence (P.O.P)? O None of these. O Itis interface point between communication entities. O It is used to connect between two telephone companies within the same region. O It is a building to which subscriber home and business lines are connected locally.Consider as a simple telephone network consisting of two end workplacesand one intermediate switch with a 1 MHz full duplex trunk between eachend workplace and the intermediate switch. Assume a 4 kHz channel foreach voice call. The telephone is used to make four calls per 8 hour workdayin average, with mean call duration of five minutes. Twelve percent of thecalls are long distance. Analyse and determine the maximum number oftelephones an end workplace can support. Note: Please explain the answer process clearly.
- In a blocked-calls-delayed cellular system with 15 trunked channels, the load per user is 0.04 Erlangs and A= 0.25 calls/hour. Find the probability that a delayed call will have to wait for more than 5 s at a GOS of 2%. 90.1 % 88.5 % 94.1 % 94.9 % O OQ.6. ABC organization wants to manage its four offices A, B, C and D. This organization has network information (200.20.110.0-200 20.110.255). For each subnet find subnet mask, network ID, first assignable IP, last assignable IP, and broadcast addresses. (Show IP Addresses in decimal as well as in binary) AnswerQ. No 3. In a Public Switch Telephone Network (PSTN), how the analog speech signal is converted to digital signal in the PCM? Also highlight the main functions of the given parts in the PSTN figure. Public Switched Trelephone Network PSTN W7CLOUD.COM Central Office
- (b) Figure Q.4b shows an Adder/Subtractor circuit implemented using Adder Q. The delay for XOR = 2t, OR = AND=1t and cascadable full adder is used for ripple carry adder. Assume inputs X, Y and ADDSUB have arrived at Ot. Analyze the critical path delay for the circuit if:- X[7.4] YI7.4] 4. A[3.0] A[3.0] lo"cle C4 C8 C4 Adder Q co C4 Adder Q co ADDSUB Sum(3.0] Sum[3.0] Z17.4] Figure Q.4b i. Adder Q is a 4-bit Ripple-Carry Adder. Show your analysis in Table Q.4b.i. ii. Adder Q is a 4-bit Carry-Lookahead Adder. Show your analysis in Table Q.4b.ii. Table Q.4b.i Table Q.4b.ii To Node Delay To Node Delay Z3 Z3 С4 С4 Z7 Z7 C8 C8 Page 14 of 21In an FDMA-based multiple access system, each user is assigned an 80 kHz channel for full-duplex communication. There are 1000 channels in total in the system.Depending on the information given in Yukon, if the starting frequency of the frequency spectrum used by the FMDA system in one direction is 1000 MHz, the carrier frequency of the channel belonging to the first user is 1.000.040 Khz.ATrueBWrongConsider a garden house where the radio channel TRT Radyo 4 is constantly open has an installed power of 450 Watt. There will be an average of 10 hours of energy consumption. How many solar panels and batteries are needed?
- In time the use of the ________ became the more desirable approach because an important parameter of the equivalent circuit was determined by the actual operating conditions rather than using a data sheet value that in some cases could be quite different. a.hybrid b.hybrid-pi c.re d.piWhich of the statement is false for the Out-Of-Band signalling? O It is having high speed data links (64 Kbps for national and 56 Kbps for international). O It is a software-based system that operates independent of the voice transport. O it is used in all modern telecommunications networks such as ISDN and GSM. O None of these.Consider an LTI system.(Need only handwritten solution please otherwise downvote)