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

Ac, power factor improvement

power factor improvement

Rlc circuit, how started the use of complex variables in circuit analysis f...

how started the use of complex variables in circuit analysis for the first time.

Construct a suitable piecewise linear equivalent circuit, Problem: The ...

Problem: The current voltage characteristic [ ID versus VD] of a semiconductor diode for VD > 0 [forward bias] is given in Figure Under reverse bias conditions [VD Fi

Long-term plans for technical loss reduction, Long-Term Plans for Technical...

Long-Term Plans for Technical Loss Reduction Long-term measures for technical loss reduction include all measures that require to be taken for the improvement of quality and r

Explain the working of depletion mosfet, Q. Explain the working of depletio...

Q. Explain the working of depletion MOSFET ? The gate voltage can control the resistance of the n-channel but as the gate is insulated from the channel, we can apply either a p

Create a time diagram - conveyer, When the PLC is in the RUN mode it will s...

When the PLC is in the RUN mode it will switch ON the conveyer so it will run continuously. This project is divided into four outcomes: (a)    Detect block on entry, close

Excess3 to bcd code converter using nand gates, design a excess3 to bcd cod...

design a excess3 to bcd code converter using only nand gates

Explain commutator action in dc machine, Q. Explain Commutator Action in dc...

Q. Explain Commutator Action in dc machine? As a consequence of the arrangement of the commutator and brushes, the currents in all conductors under the north pole are in one di

Explain aas instructions in 8086 family, Explain AAS instructions in 8086...

Explain AAS instructions in 8086 family with example and their effect on flag. AAS: it is stands for ASCII adjust after subtraction; this is used to adjust the AX register l

Motor., if load is removed so which motor will run fast? series or shunt?

if load is removed so which motor will run fast? series or shunt?

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