We are losing fax pages intermittently and it appears that this is happenning when someone faxes from a Rightfax i.e from a PC Fax software similar to Winfax though we are still trying to pinpoint it exactly. It all was working fine and we have not changed the 2811 configs. Problem appeared couple of days ago.We have a CM cluster and the 2811 connects to a 30 ch PRI to access the PSTN and uses H.323 i.e no MGCP. I cannot see any slip etc errors on the serial interface.
Any help would be great. The faxes are coming from various external organisations via the PSTN link. Would the Call Manager be involved in such a fax call?