A program module for a charge computer (BS1) for processing charge data for telecommunications services, wherein the program module contains program code which can be executed by a processor (CPUBS1) of the charge computer (BS1), wherein the charge computer (BS1) comprises receiving means (TRBS1) for receiving first charge source data for telecommunications services sent by a first exchange (SW1), wherein the charge computer (BS1) comprises conversion means (CPUBS1, MEMBS1) for converting the first charge source data into first charge billing data detectable by a charge billing computer (BC), and wherein the charge computer (BS1) comprises transmitting means (TRBS1) for transmitting the first charge billing data to the charge billing computer (BC),
- characterised in that
- the program module comprises at least one receiving function which is designed such that on the basis of statements of the receiving function, with the receiving means (TRBS1) the charge computer (BS1) can receive at least second charge source data for telecommunications services sent by a second exchange (SW2), that the program module comprises at least one conversion function which is designed such that on the basis of statements of the conversion function, with the conversion means (CPUBS1, MEMBS1) the charge computer (BS1) can convert the second charge source data into second charge billing data detectable by the charge billing computer (BC), and that the program module comprises at least one transmitting function which is designed such that on the basis of statements of the transmitting function, with the transmitting means (TRBS1) the charge computer (BS1) can transmit the second charge billing data to the charge billing computer (BC).