HDB3 is the new coding method that to encounter the lacking of previous line coding. With the unique ability, it can secure the information till the end of the system. This is important to the system that need a good coded and decode application as the information can be transmit a long the system. Meanwhile, it also can prevent the losses of information during transmitting. So that, this HDB3 can give a better coding technique as the unique ability that it have make this coding the best line coding. By using 000V and B00V, it can produce such prefect system that have less and event none error on it.