7-07-93

     If  you are getting text displayed on your screen, not smoothly,  then
it  is a wrong setting on the other end. They have V42bis or MNP5 set,  and
the  speed their modem is set too slow. The slower their modem is set,  the
more 'jerky' the text will appear. IE: They have a 2400 modem with  V42bis.
It should be set for 9600, not 2400bps. Or they might even have a V32(bis)-
9600+  modem, and set it for 2400. If you call with another 9600  you  will
geta 9600 CARRIER, while the answering modem is talking to the computer  at
a slow 2400. An answering modem should be set using the S95 register.

                               S95 Register

     By  default  S95=0 gives the computer-modem (DTE)  connect  speed.  So
whatever  speed  (19,200   38,400   57,600) you have set,  the  modem  will
respond  in kind, even if the modem-modem connect is 2400. S95=1 will  give
true  modem-modem connect speed (DCE), ie; a 2400 CARRIER will say  CONNECT
2400. If you use the CARRIER as CONNECT speed, you MUST set the software to
NOT  FOLLOW  the CONNECT speed! S95=2 will add /Arq to  default  for  error
correction  conections,  ie;  CONNECT 19,200/Arq.  S95=3  will  give  modem
connect speed with /Arq  ie; CONNECT 2400/Arq. If your software  recognizes
/Arq it may be a good idea to add it, via the S95 register.

>>>NOTE:  When the modem gives DTE (computer-modem) connect speed, if  your
software shows 'efficiency' of transfer, it will be LOW. If the modem sends
CARRIER  (DCE)  as connect speed, then 'shown' efficiency  should  approach
100%.

     If  you  want the Carrier, Protocol & Compression, with DTE  then  use
S95=44. To get the same with DCE speed, use S95=45. You can add 2 to either
(46  or  47)  which will add the /ARQ, but as you already  have  the  other
messages it is redundant.

     The  default S36=7 enables buffering so that the modem-computer  speed
may differ from the modem-modem speed.

>>NOTE<<  Except for QMODEM, all the sofware I have seen does NOT show  any
results  beyond  CONNECT  xxx/ARQ.  You  can see  the  results  if  you  do
ATDTphoneumber in Terminal mode.

                                   Don Hinds - Zoom Tech
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