-------------------DISABLING CALL-WAITING--------------------


          Many users who  use  a  modem from their home have complained
         about losing connections  if   they   have  the  Call-Waiting
         feature on their phone.  The problem with having call-waiting
         and using a  modem  is that when your modem is  on-line,  the
         beep that announces  an  incoming call interrupts the carrier
         tone long enough to cause your modem to break the connection.
         There are at least three ways to deal with this problem:

         1) Flexible Call-Waiting.  In many  areas the phone companies
         have activated an  enhancement  to the call-waithing  feature
         (at no additional  cost) which allows you to temporarily turn
         it off before placing a call.   To  suspend  call-waiting  on
         touch-tone phones, dial  *70; for rotary phones,  dial  1170.
         You will hear  a  double beep followed by the dial tone.  Now
         dial the number you want, and call-waiting  will be suspended
         until you hang up.  You must dial the code for  each call you
         wish to suspend.    This  service  is  part  of  the  "Equal-
         Access/1-Plus" service and may  not be available in your area
         yet.  Check with  your  local phone company to  see  if  your
         exchange has installed this feature.

         2) Extending the Carrier-loss Detection Time. Most, not all,
         communication software packages  allow  you  to increase the
         amount of time the carrier can be lost without  breaking  the
         connection.  If you set this value to an interval longer than
         that of the  beep,  the  connection will be maintained.  This
         method works, but unless you have  software  that  checks the
         data transmission and uses an error-free protocol,  you  will
         experience some loss of data.  Good protocols that use an
         error-free transmission are: Megalink, Sealink, Zmodem, and
         Ymodem, to name just a few.  If there is an error detected,
         the packet of data is sent over again.  The transmitting and
         receiving ports, actually tell each other, there has been an
         error detected by use of a parity bit.

         3) Call-Forwarding.  If you have the call-forwarding feature,
         you can set  your  phone to forward incoming calls to another
         number.  All calls will automatically  be  forwarded  without
         causing a beep on your line.  It will attempt  to  produce  a
         short ring to  indicate  that  call-forwarding was in effect,
         but this ring is handled differently  than  the  call-waiting
         beep and will not interrupt your connection.

         Information taken  from  Exchange  Magazine, January/February
         1986.