Classic explanation. Thanks a ton tarry.
Originally posted by Tarry
the conceptual difference
The phone number you dial is the number which the other end must possess.
the use of a listener.
A telecom exchange must be ready to not only wait/standby/listen for your calls/requests but for everyone else. So after you have been connected, the exchange reliquishes the connection and waits fro others to call in...
Hope this explains a littel bit.
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