Your MIS/IT or purchasing department orders services and approves invoices.
Your legal department manages and approves contracts.
Your
finance/accounting department manages and pays bills.
Which of your departments has personnel trained in telecom billing regulations,
tariffs, rates, terms, conditions and US Codes?
Without this knowledge it is virtually impossible to determine if you are billed
correctly. Even if your contract matches your bill, your contract may contain errors.
You have to be able to identify
an
overcharge before you can correct it.