BALANCES BETWEEN TELECOM COMPANIES

  hi

In telecom companies, we've balances between us and other telecom comapnies (interconnections) so i'll give an example, we have the following balance

our company                xx telecom company
    1000                                       500

in this case we should receive a payment of 500 because the balance is in our favor, we should enter 500 in AP (expence), in AR we should enter 1000 (revenue), we also should enter payment in AR with 500, how can we do to balance the 500 between AP and AR. thanks lot