On other makes and models. After awhile we kept track of who we were sending the fax to. After awhile we found it was all of a handful of numbers that had an issue. And when we looked into what fax machine they had, in every case the fax machine was nearly 20 years old.
It appears that not all these machines can converse with very old machines.
I have a networked Officejet 7130 multifunction machine. Very frequently (but not all the time), when I send a multipage fax from the front panel, the last page "hangs" and the job has to be canceled. All but the last page are successfully transmitted. This failure only happens on the last page of the mutipage fax.
HP, of course, is of no help. Has anyone else seen this problem?