Myothet_khaing
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1

Answers

Where does the ringing voltage originate ? What is ringback ? Where is it from??

it is my university lecture chapter and my teacher ask me like that !!!! i can' t answer it !!!
myothet_khaing
12/02/2017

0

Answers

What is the hierarchy of swithing centers? WHy is there flexibility in the routing of calls via different levels of this hierarchy?

This my univrsity assignment !!! please answering me as fast as !! thanks
myothet_khaing
12/02/2017

1

Answers

How is the phone rung ?how does the ringing signal get through the open loop???

IT is my homework for me !!!
myothet_khaing
10/02/2017
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