KPETERSEN@SIMTEL20.ARPA (03/21/84)
From: Keith Petersen <KPETERSEN@SIMTEL20.ARPA>
SUBJECT : MDM727 - MDM729 MOD FOR PMMI USERS FOR RINGBACK NUMBERS
FROM : IRV HOFF W6FFC
DATE : 18 MAR 84
This mod affects just PMMI modems that are using MDM727 and
later, including MDM728 or MDM729. Change one byte:
097F from 75 to 69 (then SAVE 73 sectors)
The ringback circuit should then work normally. When I fixed
MDM727 to allow redialing the new (0-9) numbers and changed some
some labels, this one was overlooked, sorry. If changing the
source code, make the following change:
;.....
;
;
; Hang up, redial and listen for dial tone
;
RINGBK1: CALL HANGUP ;hang up the phone
MVI B,RBWAIT ;wait 5 seconds before redialing..
CALL TIMER ;..for line to clear, etc.
CALL DIALBGN ;disconnect, reconnect, wait for tone
JNC DIAL12 ;go redial number
JMP DIALAGN ;no dial tone heard
;.....
;
- - - - - - - - - - - - - - -
(next to last line was: JNC DIAL13 which was incorrect)
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