How to set up PBX system?

What would be the major disadvantage of a company monitoring their PBX system?

• Phone fraud or PBX fraud involves gaining access to a company's PBX (Private Branch Exchange) and using it to route international calls allowing callers to dial numbers at little or no cost to the callers but the PBX owner has to bear the cost of the call. My question is: Why don't more companies monitor their PBX system? There must be some disadvantage to doing it and I can't figure out why.

• Answer:

  The disadvantage is that if it is a company's POLICY to monitor its PBX, then it is legally responsible for how its PBX is used. So if somebody uses it to do something illegal, law enforcement could say that the company is responsible for the use of its PBX and monitors it so it must have been with the blessings of the company. This is why most companies retain the right to do so but do not, as a matter of policy, regularly do it. They don't want to take on the liability.