We are developing a billing software of a PABX system which uses Nortel Meridian 61c. We are using communication ports (COM1, COM2) to get call informations from Meridian 61C to Computer. The problem we are facing that apparently it seems to us that Nortel Meridian 61C does not have any buffer to save the call informations. As a consequence it seems to us that call informations are lost immediately and we can't retrieve the call log from Meridian 61C further. For this reason our software is currently unable to count the calls in case of miscommunication between COM port and Meridian 61c. Is there hardware or software solution to get call log from Meridian 61C. Please inform me.