; FILE MHz2144.SCR (MHz2144.SCR)
;
; An MS-DOS Kermit script program for dialing the Megahertz 2144J 
; modem, to be used with MS-DOS Kermit 3.11 or later.
; The modem is set up for compression, error correction, all types of fallback.
; RTS/CTS flow control, fixed interface speed of 57600 or 38400.
; Copied after PP14400 modem
;
; Authors: Christine M. Gianone, Frank da Cruz; Columbia U, June 1993
;          Edward J. Krall, February 1996
;
def errfail echo \%1, hangup, goto fail ; Macro to handle failures.
if < VERSION 312 errfail {MS-DOS Kermit 3.12 or later required.}
if eq "\v(system)" "UNIX" if = \v(local) 0 stop 1 You must SET LINE first

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
set port com2
hangup				; Begin by dropping DTR
pause 1				; for one second

; Speed.  Don't worry about modem, it autobauds up to 14400.

set speed 57600			; If computer can be set to 57600 bps, use it.
if fail set speed 38400		; If not, use 38400.

echo Configuring Megahertz 14400 on \v(line).

wait 0 DSR			; Check modem signals that should be on
chkerr {No DSR signal - check your modem and cable}
wait 0 CTS
chkerr {No CTS signal - check your modem and cable}

:INIT
output AT  Q0 V1 \13		; Enable word result codes
chkok {Can't get modem's attention}

output AT E1 W1 S95=30 &D0 X4\13 ; Echoing, result codes, etc.
chkok {Can't initialize modem}

echo Enabling modulation negotiation...
output AT &F0\13		; Start modulation speed negotiation at V32bis
chkok {Can't enable modulation speed negotiation}
echo Enabling hardware flow control...
output AT &K3\13		; RTS/CTS hardware flow control
chkok {Can't enable RTS/CTS}	; On modem
set flow rts/cts		; And in Kermit too, but only now
echo Configuring modem to ignore BREAK...
output AT S82=128\13		; Make modem ignore BREAK
chkok {Can't become transparent to BREAK}
echo Enabling error correction and data compression...
output AT &Q5 S36=7 S46=138\13	; Enable error correction & compression
				; with automatic speed buffering 
chkok {Can't enable compression EC and fallback}

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 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 PP14400.SCR