What is the advantage(s) of B8ZS over ZCS on a DS1 facility?

A.
B8ZS ensures the line’s density and ZCS does not

B.
B8ZS does not require repeaters for long distances

C.
B8ZS allows for “clear channel” configurations to support data applications

D.
B8ZS has no advantages over ZCS

Explanation:
B8ZS is similar to AMI, but uses intentional BPV’s to break up long strings of zeros, allowing transmission through the link without violating the ones density standard. The equipment does this by replacing any string of eight zeros with two intentional BPV’s. The first BPV replace the fourth zero with a pulse in the same pole as the last pulse in the previous word. The second BPV replaces the fifth and seventh zeros. Additionally, the eight zero is assigned a pulse.