What are the supplementary services, Electrical Engineering

Assignment Help:

Q. What are the supplementary services?

new services are called supplementary services and some of the prominent ones are as below:

Category 1:

  • Abbreviateddialling
  • Recorded number calls or no dialling calls
  • Call back when free.

Category 2:

  • Call forwarding
  • Operator answer.

Category 3:

  • Calling number record
  • Call waiting
  • Consultation hold
  • Conference calls.

Category 4:

  • Automatic alarm
  • STD barring
  • Malicious call tracing

A subscriber issues commands to an exchange to deactivate or activate a service, record or clear data in subscriber line data area or solicit an acknowledgement from exchange. As an instance, a user can disable or enable STD facility on his line by using a command. A command may have or may not have data associated with it. Number of digits in the data, when present, can vary depending upon the command. Consequently, subscriber commands are designed to be of variable length necessitating use of an end-of-command symbol.


Related Discussions:- What are the supplementary services

Illustrate bandstop filter, Q. The dual situations is shown in Figure , in ...

Q. The dual situations is shown in Figure , in which a high-pass and a low-pass filter are connected in parallel to produce a bandstop filter. With ω CLP = 10 CHP = 50, ω 0

Load carrying capacities , Task a)    Investigate and describe the sign...

Task a)    Investigate and describe the significance of the following: i.    Slenderness ratio and buckling in columns ii.    Effective length of columns b) Explain Eu

Motor, 2. A 6 pole lap-wound armature having 720 conductors, rotates in a f...

2. A 6 pole lap-wound armature having 720 conductors, rotates in a field of 20.35 mWb. (a) If the induced current is 72 A, what is the torque developed by armature? (b) If the indu

Show the frequency response of rc coupled amplifier, Q. Show the Frequency ...

Q. Show the Frequency response of Rc Coupled Amplifier? 1. At low frequency i.e,less than 50 Hz reactance of Cc is going high hence same part of the signal will pass from one s

Measurement, Why delay circuit used in CRO?

Why delay circuit used in CRO?

When input is a triangular wave, Q. When input is a triangular wave. W...

Q. When input is a triangular wave. When the input fed to differentiating circuit is a triangular wave, the output will be a rectangular wave. During the period OA of

Steps to develop microprocessor based computer system, Explain in brief ste...

Explain in brief steps to develop a Microprocessor based computer system. The design of a microcomputer system should begin with the CPU module. It modules establishes the fund

Determine the peak magnetizing current, A forward converter has the followi...

A forward converter has the following parameters: input source voltage V s = 100 V, N 1 /N 2 = N 1 /N 3 = 1, magnetizing inductance L m = 5 mH, output inductor L o = 200 μH, C

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