I have a couple of FAXes connected to FXS ports on a UC520 that send FAXes out over an ISDN/PRI connection. I was getting spotty results with some FAXes going thru and others failing. Troubleshooting the problem I found that the problem seems to be that my FAX is trying to connect at what it calls "Super G3" speed of 33.6kbps. When I lowered the FAX to "G3" speed of 14.4kbps most, if not all, FAXes are now going thru. Is there some configuration change I can make to get the 33.6 speed to work? Right now these are the only FAX specific commands I have on my box.
network-clock-participate wic 3
network-clock-select 1 T1 0/3/0
timeouts ringing infinity
I'm I missing something?