->On 07-22-97  14:57 Dennis Was discussing problem with Rick<-
 
 
 RC-> Sounds very much like a flow control problem.  Make sure your modem and 
yo
 -> comm program are both configured for software (RTS/CTS) flow control.
                                         ^^^^^^^^^^^^^^^^^^
    I believe what you are reffering to here is (Xon/Xoff) flow control.
  Rts/Cts is a hardware flow control. Although most telecommunications
  programs have an option for the user to define whether the hardware
  is configured in this manner. You must still make sure that the com
  device is configured in this manner for it to function as such.
 
 RC-> You can generally receive data with no flow control enabled (because 
 -> the CPU is so much faster than the modem, the PC never has to tell the 
 -> modem to "wait 
    
    Although most often true, not always true. Take for example these 
  system configurations. Although rare there are still some in use today.
  System (1) is a bbs user, system (2) is the bbs being accessed.
 
  (1) -  2mhz CPU, 33.6k modem. Max buss at 19,200  
  (2) - 33mhz CPU, 33.6k modem. Max buss at max modem through put.
 
  Modem 1 & 2 can still negotiate a 33.6k link. However cpu #1 can not
  accept data from it's modem at that rate. If modems #1 and #2 are not
  BOTH configured for (Modem-Modem Xon/Xoff) flow control. There is a
  real possibility that buffer overruns WILL occur.
 
 RC-> but when sending data you will quickly overflow the modem buffer 
 -> if you do not use flow control properly.
 
    This is very true.
 
 DH> Ok, but what if you know for certain that both the comm program and
 DH> the modem are both configured to use the software flow control?
 DH> Using Win95, are the default buffer settings the best or should these
 DH> be changed and what about the fossil settings on a bbs, what are the
 DH> optimum settings to be best for the most types of modems?
 
    In any multi-tasking enviroment you should look to see how much of
  the system resource time you are alocating to each of the com devices.
  Also look to see what it's idle time is set at. The best results can
  be achieved by lowering idle time to it's min limmit, and allowing it
  a large enough amount of the processor time. Thus allows it to process
  incoming data as efficently as possible.
 
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