Thank you so much RonR! Yes it did work!
However, I am still having one problem that I believe is due to the OBI not being able to handle the rapid speed that my fax program is dialing.
When it dials "1-888-473-2963" using the OBI, it does not connect and the dialtone remains. It works when I slow it down by inserting commas. For example "1,-888,-473,-2963" and "1,888,473,2963" both connect.
Is there a simple way to make OBI 100 accept the normal-number format or dial slower?
BTW no problem Faxing without the OBI using Cablevision's cable phone system! But I want to use the OBI as a second phone line to make outgoing calls and to send and receive faxes.