After the deregulation of the telephone industry in , the responsibility for premises cabling was left in the hands of the building owner instead of the service provider. The industry was then left with inconsistent standards.

1984

Explanation:

In 1984 , first deregulation of telecommunication took place majorly American regions.It is situation , AT&T was made deprived of all the Bell companies and assets.They were ordered by the court to continue running long distance telephone communication.

It gave unstable standards for telecommunication which led to AT&T and Bell companies leaving of slot from telecommunication zone after a while as building owners were not able to handle responsibility adequately or telephone communication.  

answer; i believe its called ; checks   and balances;

well, paralell is parallel. i am providing links to .

hope this !

a series circuit is one with all the loads in a row. there is only one path for the electricity to flow. if this circuit was a string of light bulbs, and one blew out, the remaining bulbs would turn off.

unlike in series circuits, a charge in a parallel circuit encounters a single voltage drop during its path through the external circuit. the current through a given branch can be predicted using the ohm's law equation and the voltage drop across the resistor and the resistance of the resistor.

a parallel circuit has certain characteristics and basic rules: a parallel circuit has two or more paths for current to flow through. voltage is the same across each component of the parallel circuit.