Call Waiting
The function is available in some telephone networks and it allows receiving the other call at the moment of the actual conversation by the method of setting the active call in the waiting mode or cancellation. This will let not to miss an important call and to agree upon time when it will be possible to call back.
System integration is the way of putting together all the smaller parts called „subsystems” into one big system and ensuring that everything functions successfully together as a system.
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