Determine briefly subscriber loop system, Electrical Engineering

Assignment Help:

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.

1299_Determine briefly subscriber loop system.png

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


Related Discussions:- Determine briefly subscriber loop system

Gis application, GIS APPLICATION IN THE POWER DISTRIBUTION ENVIRONMENT ...

GIS APPLICATION IN THE POWER DISTRIBUTION ENVIRONMENT Previously, we have discussed the IT applications in the areas of Metering, Data Acquisition and Management, Asset Manage

OUT Output Instruction , OUT Output Instruction This instruction is us...

OUT Output Instruction This instruction is used  send data byte  stored in the accumulator  to the  output  port  whose  address  specified in the instruction. The instruction

Evaluate the available received power, (a) Some antennas have a physical ap...

(a) Some antennas have a physical aperture area A that can be identified and is related to the effective area A e by A e = ρ a A, where ρ a is known as the aperture efficiency.

Distribution transformers, Distribution Transformers 1. Augmentation/...

Distribution Transformers 1. Augmentation/Addition of Distribution Transformers Distribution transformers have to be augmented by installing additional transformers or in

What do you mean by star topology, Q. What do you mean by Star Topology? ...

Q. What do you mean by Star Topology? Star Topology: In Star topology, all user nodes are connected to central node point that interconnects all individual users' links and nod

Explain the energy bands in solids, Explain the energy bands in solids. ...

Explain the energy bands in solids. There are as several energy bands in a solid as there are energy levels in the parent atoms. Many electrical properties of significance

Testing of ct operated meters, Testing of CT Operated Meters The subse...

Testing of CT Operated Meters The subsequent tests should be carried out for CT operated meters: i) Ratio test through primary injection kit, ii) Polarity test, iii)

Compare the percent error of both meters, Q. Error speci?cations on a 10-A ...

Q. Error speci?cations on a 10-A digital ammeter are given as 0.07% of the reading, 0.05% of full scale, 0.005% of the reading per degree Celsius, and 0.002% of full scale per degr

What is the difference between near call and far call, What is the differen...

What is the difference between near call and far call? The PROC directive specifies the start of a procedure, should also be followed along with a NEAR or FAR. A NEAR procedure

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd