11.17. Can tip try more than one line for each site?

This is often a problem where a university has several modem lines and several thousand students trying to use them...

Make an entry for your university in /etc/remote and use \@ for the pn capability:

        big-university:\
        :pn=\@:tc=dialout
        dialout:\
        :dv=/dev/cuaa3:br#9600:at=courier:du:pa=none:
      

Then, list the phone numbers for the university in /etc/phones:

        big-university 5551111
        big-university 5551112
        big-university 5551113
        big-university 5551114
      

tip will try each one in the listed order, then give up. If you want to keep retrying, run tip in a while loop.