11-18-93                  Dialtone / BUSY  Problems

     Some places (more often in Europe than in the US) or on some  in-house
phone systems, the modem may not recognise Dialtone or BUSY, in rare  cases
both.  In  this  case use X1, X2 or X3 in the dial prefix (ATX1DT)  or  the
init  string. X1 will see neither Dialtone nor BUSY, X2 will  see  Dialtone
only,  and  X3 will see the BUSY only. If the software/fax doesn't  have  a
place  for  init, change call-progress to NONE.

     There  is  also  X2  if you have trouble  with  false  BUSY,  but  can
recognise dialtone (can happen w/voice answer fax machines).

     Sometimes putting a '@' at the end of the dial string helps (after the
phone  number, as that waits for 5 seconds of silence after the  other  end
picks up the phone. (will wait for silence after a voice answer).

     The  modem uses only 2 wires on the phone line, the center 2 wires.  A
phone  which uses other wires can still get it's signals through the  other
wires, even though the modem cannot see them.

     If  you  have trouble dialing PULSE there is a command to  change  the
pulse  make/break  ratio needed in some areas (usually overseas).  &P  (see
your manual).
                                   Don Hinds - Zoom Tech
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