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Filename : DATAPORT.SCR

; FILE DATAPORT.SCR (MSMDATAP.SCR)
;
; An MS-DOS Kermit script program for dialing the AT&T / Paradyne Dataport
; 14400 modem, internal or external, to be used with MS-DOS Kermit 3.12 or
; later. The modem is set for V.32bis, compression, error correction, all
; types of fallback, RTS/CTS flow control, fixed interface speed of 57600.
;
; Rename this file to DATAPORT.SCR if necessary.
;
; To use: SET MODEM=DATAPORT (in DOS, before starting Kermit)
; or: DEFINE _MODEM DATAPORT (in Kermit, before dialing)
; and: Make sure Kermit executes the standard MSKERMIT.INI file.
;
; Authors: Christine M. Gianone, Frank da Cruz; Columbia U, September 1993
; Revised Oct 94.
;
def errfail echo \%1, hangup, goto fail ; Macro to handle failures.
if < VERSION 312 errfail {MS-DOS Kermit 3.12 or later required.}

define chkerr if fail stop 1 \%1
define chkok input 3 OK, if fail stop 1 \%1

set input echo on ; So we can watch what happens.
set input timeout proceed ; Allow IF SUCCESS, IF FAILURE.
set input case ignore ; Use caseless string comparisons

set parity none ; Avoid parity foulups
set flow none ; Avoid flow control deadlocks
hangup ; Begin by dropping DTR

; Speed. Don't worry about modem, it autobauds up to 57600 bps.
; NOTE: This modem doesn't seem to have a command for locking the
; interface speed. But it seems to do it anyway.
;
set speed 57600
wait 5 dsr ; Time to recover from HANGUP...

echo Configuring AT&T DataPort on \v(line).

:INIT
output ATQ0V1\13 ; Enable word result codes
chkok {Can't get modem's attention}
; X6 = Verbose result codes, show modulation speed
; &C1 = CD follows RS232
; &D2 = DTR follows RS232
; &Q0 = Asynchronous data mode, use AT command set
; S84=0 = Normal ERROR response to bad commands
output AAAT E1 X6 &C1 &D2 &Q0 S84=0\13
chkok {Can't initialize modem}
output AT \92Q3\13 ; RTS/CTS hardware flow control
chkok {Can't enable RTS/CTS} ; On modem
wait 5 cts
if fail errfail {Modem is not asserting CTS!}
set flow rts/cts ; And in Kermit too, but only now
pause 2 ; This is needed for internal model
output AT %B14400 S41=1 S78=0\13 ; Modulation = V.32bis with fallback
chkok {Can't enable modulation fallback}
output AT \92N7%C1\13 ; Compression and EC enabled
chkok {Can't enable compression and EC}
output AT \92K5\13 ; Make modem pass BREAK transparently
chkok {Can't become transparent to BREAK}

if def \%1 if not equal "\%1" "=" goto BEGIN
echo Modem initialization complete, no number to dial
end 0

:BEGIN ; Now DIAL.
clear ; Clear INPUT buffer.
set count 5 ; Dialing retry counter, 5 tries allowed.
echo Dialing \%1 on \v(line) at \v(speed) bps, wait...
echo
pause 1
goto dial ; 1st time, skip pause and Redialing message

:REDIAL
set alarm 30
pause 30 ; Wait 30 seconds before redialing.
if not alarm errfail {Dialing canceled.}
echo Redialing... ; Message for redialing.
pause 1

:DIAL
output ATD\%1\13 ; Dial the number.
set alarm 90 ; (For detecting keyboard interruptions.)
if > VERSION 312 clear input ; Clear echo from INPUT buffer.
if < VERSION 313 clear
input 30 \10 ; Wait for the linefeeds...

:GETMSG
input 60 \10 ; ...that surround the response message.
if success goto gotmsg ; Got a message.
if alarm errfail {No response from modem.} ; No response in 90 seconds.
hangup ; User interrupted from keyboard,
output \13 ; cancel dialing by sending carriage return,
goto again ; and go try again right away.

:GOTMSG
reinput 1 CONNECT ; Got a message, was it CONNECT?
if success goto done ; If so, we're done.
reinput 1 BUSY ; Line is busy.
if success goto busy ; Go wait a while and then dial again.
reinput 1 ERROR ; Command syntax error.
if success errfail {Dialing command error}
reinput 1 NO CARRIER ; Phone didn't answer or no carrier.
if success errfail {No answer or no carrier}
reinput 1 NO ANSWER ; No answer
if success errfail {No answer - try again later}
reinput 1 NO DIALTONE ; No dialtone when phone taken off hook.
if success errfail {No dialtone - Is your modem connected to the phone line\63}
goto getmsg ; None of the above, get another message.

:BUSY
if < \v(count) 2 goto quit ; Don't wait 30 seconds if tries are used up.
Echo Line is busy, will dial again in 30 seconds.
echo Press any key to cancel...
output \13 ; CR cancels dialing
hangup ; Hang up.
:AGAIN
if count goto redial ; Then go redial.
:QUIT
errfail {It never answers! I give up.} ; Too many tries.

:DONE ; Connected.
echo \7 ; Celebrate with a beep.
define errfail ; Erase local macro definitions...
end 0 ; Finished, return success code.

:FAIL ; Dialing failed, no beep.
define errfail ; Erase local macro definitions...
end 1 ; Return failure code.

; End of DATAPORT.SCR