Explain routing tone in strowger telephony, Computer Engineering

Assignment Help:

Explain routing tone in strowger telephony with waveforms and the timings.

The call-in-progress tone or routing tone is a 400 Hz or 800 Hz intermittent pattern. In electromechanical systems, this is generally 800 Hz with 50 percent duty ratio and 0.5 s on/off period. This is a 400 Hz pattern with 0.5 s on period and 2.5 s off period, in analog electronic exchanges. In digital exchanges, this has 0.1 s on/off periods at 400 Hz. While a subscriber call is routed by a number of different types of exchanges, one hears various call-in-progress tones as the call progresses by different exchanges. Figure shows a routing tone pattern.

1078_routing tone.png

Figure: call-in-progress tone or routing tone


Related Discussions:- Explain routing tone in strowger telephony

Using which ARQ, Using               ARQ, a sending modem must wait for a ...

Using               ARQ, a sending modem must wait for a return ACK for each sent block before sending the next block. (A)  discrete                                      (B)

Classification of interrupts - computer architecture, Classification of int...

Classification of interrupts:   1. a) asynchronous   external components or hardware malfunction 1.b)synchronous   function of program state (for example over

Overview of the dreamweaver work area, Q. Overview of the Dreamweaver work ...

Q. Overview of the Dreamweaver work area? Let's start with a brief overview of the Dreamweaver work area. If you haven't already launched Dreamweaver, double-click Dreamweaver

Explain auto increment and auto decrement mode, Explain Auto increment and ...

Explain Auto increment and Auto decrement mode  The register is incremented or decremented after (or before) its value is used to access memory.  The address stored in the regi

Illustrate working of t flip-flop, Q. Illustrate working of T Flip-Flop? ...

Q. Illustrate working of T Flip-Flop? T (Toggle) flip-flop is attained from JK flip-flop by combining inputs J and K together. The implementation of T flip-flop is displayed in

How can common bus system be constructed, How can common bus system be cons...

How can common bus system be constructed A common bus system could be constructed using multiplexers. These multiplexers select source register whose binary information is then

What is library, What is library? A library is a collection of classes ...

What is library? A library is a collection of classes that are useful in most of the contexts. Classes must have accurate and thorough explanations to help users.

Define rules for evaluating the boolean expression, Define Rules For Evalua...

Define Rules For Evaluating the Boolean Expression? Generally, the following rules must always be followed when evaluating the Boolean expression: Primary, perform all in

Define message passing, Q. Define Message Passing? The PVM communicatio...

Q. Define Message Passing? The PVM communication model offers asynchronous blocking receive and asynchronous blocking send and nonblocking receive functions. In our terminology

Algorithms, Data array A has data series from 1,000,000 to 1 with step size...

Data array A has data series from 1,000,000 to 1 with step size 1, which is in perfect decreasing order. Data array B has data series from 1 to 1,000,000, which is in random order.

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