Thanks Husse for your help.
In part the results of the 'lspci' command are...
00:1e.3 Modem: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Modem Controller (rev 03)
... which seems to indicate that the kernel 'sees' the modem. However, I am at a loss to know where it mounts it! If I knew that, I could direct gnome-ppp where to look. Gnome-ppp really only wants to look in the usual places: /dev/ttyS0, /dev/ttyS1, etc ... and from my puppylinux experiment, I found that it looked for and found a modem at /dev/ttySL0. however, just putting this value in wont work because such a device is not there! I think the real question is 'where does the kernel mount this modem??