S-Registers are just timers, so I seriously doubt that one of those is causing this. I'm sure there is a & or % command that disables the fax function on my end. That's the problem: I don't know which one it is and the documentation on many of the AT commands are clear as mud!

The link you provided is a little bit more descriptive than what I've been reviewing. It would appear that the device mode being set to zero would be what I'm looking for. Now, to figure out the actual AT command line for it!

Many of these locations aren't using IP lines, and I've tried steering the baud rate down to no avail.

Ed Vaughn, MBSWWYPBX