OK, I thought I could do this without asking for help, but... I thought the line I wanted to make ring was port 33 (ext.201) but when I followed your instructions for just the first two lines, 33 & 34 (just to be safe) it didn't work, so perhaps I have the wrong port.

How do I figure out what port a particular extension is on?

A computer is like an Old Testament god, with a lot of rules and no mercy. - Joseph Campbell