How do you tell if your company's telecom bill is correct? Even a home phone bill can be so intimidating that most people just pay it without much inspection. According to the Aberdeen Group, telecom is one of the largest and most poorly organized spend categories in most companies. Eighty-five percent of telecom invoices are not audited, even though seven to twelve percent of all charges are in error, which indicates the pressing need for better telecom expense management.

With the average enterprise spending about 4% of its revenue on telecom, billing errors can amount to many thousands of dollars at large corporations. The above figure does not even take into account inaccurate inventory records. Horror stories abound about telecom billings continuing for employees' cell phones long after they have left the company, or being billed for branch locations that no longer exist.

Telecom Expense Management (TEM) is the body of knowledge that deals with call accounting