Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Determine briefly subscriber loop system. Give some technical specification for subscriber lines.
Ans:
Subscriber Loop System:Each subscriber in a telephone network is connected generally to the nearest switching office by a dedicated pair of wires. Subscriber loop refers to this pair of wires. It is un-widely to run physically independent pairs from each subscriber premises tothe exchange. It is far easier to lay cables comprising a number of pairs of wires for different geographical locations and run individual pairs as needed by subscriber premises.
Commonly four levels of cabling are used as displayed in figure. At the subscriber end, drop wires are taken to a distribution point. Drop wires are the individual pairs which run into the subscriber premises. At distribution point, drop wires are connected to wire pairs in distribution cables. Many distribution cables from nearby geographical locations are terminated on a feeder point where they are linked to branch feeder cables which, in turn, are linked to main feeder cable. Main feeder cables carry a larger number of wire pairs, usually 100-2000, than distribution cables which carry normally10-500 pairs. Feeder cables are terminated on a main distribution frame (MDF) at the exchange. Subscriber cable pairs emanating from exchange are also terminated on the MDF.
Exchange pairs and subscriber pairs are interconnected at the MDF by jumpers. MDF thus provides a flexible interconnection mechanism which is very useful in reallocating cable pairs and subscriber numbers. Technical specifications for subscriber lines include:
1. Diameter of wire
2. D.C. resistance per Km
3. Attenuation per K
Q. (a) Two amplifiers, which can be represented by the model of Figure of the text, are connected in cascade (that is, head to tail), as shown in Figure. Let their parameters be R
Systems such as those encountered in mechanics, thermodynamics, and hydraulics can be represented by analogous electric networks, from the response of which the system characterist
Analysis of Frequency Response with PSpice and PROBE PSpice can readily accomplish the circuit analysis as a function of frequency, and PROBE can display Bode plots for magnitu
Q Find the diameter of a circular waveguide that will have a lower cutoff frequency of 10 GHz and also specify its largest usable frequency.
Q. Show how a 16-to-1 multiplexer can be used to implement the logic function described by the following truth table.
Describe in brief the Formation of energy bands in solids and hence explain how it helps to classify the solid in to conductors and insulators. Energy Bands in Solids Acco
Q. A single-phase, two-winding, 10-kVA, 440:110- V, 60-Hz transformer is to be connected as an autotransformer to supply a load at 550 V from a 440-V supply. Draw a schematic diagr
can you please briefly explain about significance of the word direction in vectors with some valid points
In a CDMA system, the signal is spread over a large bandwidth by multiplying the transmitted symbol by a sequence of short pulses, also called chips. The
Q. Given ¯B = (y ¯ax - x ¯ay )/(x 2 + y 2 ) T, determine the magnetic force on the current element Id ¯l = 5 × 0.001¯a A located at (3,4,2).
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd