1-19-94                      Dumb Mode

     Like Hayes, all Zoom/modems are 'smart' modems. They cannot be  turned
into  'true  dumb'  modems. However, they can be set to  turn  off  certain
responses which in most cases is what is actually required.

     DEFAULT settings are listed first.

E1 - echo commands being sent to the modem back to the computer
E0 - do NOT echo back commands

Q0 - sends modem reponses back to the computer
Q1 - do NOT send back any responses
Q2 - Send back originating responses, do NOT send answering responses.

V1 - send respsones as words
V0 - send responses as numbers

X4 -  this command chooses which CONNECT BUSY (etc) responses are sent back
      to the computer. See the manual for other than X4.

&S0 - Force DSR ON
&S1 - sometimes needed in 'dumb'

The following may effect in some situation.

N1 - connect at any speed             &K3 - RTS/CTS flow control
N0 - connect fixed speed              &K0 - none
                                      &K4 - Xon/Xoff
&C0 - DCD forced ON                   &K5 - transparent Xon/Xoff
&C1 - DCD follows carrier
                                      &R0 - tracks RTS signal
&D0 - does nothing w/DTR              &R1 - ignores RTS
&D2 - Hangs up on DTR drop
&D3 =  "  and resets

One other thing may help. If the modem must not accept any commands, change
register  S3. default is 13 for carraige return. Something like 39 for  the
apostrophe  or the < or > might be a good choice. Be Sure if you  save  the
change, to write it down so you can change it back later. If it was '  then
to change it back just type ATS3=13'  and it will change back to 13.

                                   Don Hinds - Zoom Tech

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