If  you are going into communications with  modems  and
              you  have  no Telecomfreak-friend close to you  and  you
              want  no nervous breakdown in the near future,  have  at
              least a "breakbox",  self made or from the shop. This to
              follow  the different DTE/DCE levels. If you want to log
              a  HAYES  session to evaluate the connection process  or
              data  exchange process,  make from your old  computer  a
              "DATASCOPE".  (See Appendix A for some suggestions).  An
              other  advise is to standardise your cable set.  As some
              manufactures make a mash of the V24 or RS232C pins,  you
              have  not to follow  it.  On telephone line level it  is
              handy  to have in your surrounding a scope or  frequency
              counter.