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From: root@hobbes.UUCP (John Plocher)
Newsgroups: comp.unix.questions,comp.unix.xenix
Subject: advice on modems wanted please
Message-ID: <249@hobbes.UUCP>
Date: Sun, 4-Oct-87 03:03:46 EDT
Article-I.D.: hobbes.249
Posted: Sun Oct  4 03:03:46 1987
Date-Received: Wed, 7-Oct-87 04:49:12 EDT
References: <163@bby-bc.UUCP>
Reply-To: root@hobbes.UUCP (John Plocher)
Followup-To: comp.unix.questions
Organization: U of Wisconsin - Madison  Spanish Department
Lines: 48
Xref: mnetor comp.unix.questions:4392 comp.unix.xenix:892

+---- john@bby-bc.UUCP (john) writes in <163@bby-bc.UUCP> ----
| 
|  I have just spent a couple of disappointing days trying to get a
|  2400baud modem working with my Microport system.
|  						       ... the major
|  problem seemed to be that right after making a connection with an
|  incoming call it would drop CD while it transmitted it's connect
|  message and this would cause getty to die.
+----

Try turning the modem's local echo off.  If you are using the new dialer
(state machine in /usr/lib/uucp/dialinfo) it gets confused when the modem
echos the "ATDTxxx-xxxx".  Either that, or expand the dialinfo file to handle
the echo'd stuff.
Here is the dialinfo file I use for a USR 212A (1200 baud):


##############################################################
#       Dialinfo - Dialer procedure definitions              #
##############################################################

usr212A,
	retry=20,
	s0=P1 M"AT E0 M0 S0=6 Q0\r" [OK]1 [in:]4 [IN:]4 [rd:]4 [RD:]4 S10 T3,
	s1=M"AT DT%N\r" [CONNECT]10 [NO CARRIER]2 S60 T3,
	s2=D1 R3 G0,
	s3=D1 R10 G0,
	s4=D1 R5 G0,
	s10=C1 G+,

The s0 line ("AT E0...") turns both local echo and the speaker off, sets
the autoanswer for the 6th ring (the line is primarily a voice line) and
does something with the "Q" command which I forget at the moment :-).  After
getting an "OK" it goes to state 1, otherwise ("in"...) it assumes it is 
already connected to a Unix port and drops carrier and repeats.
State 1 dials the number (%N) and waits for either the "CONNECT" or the
"NO CARRIER" message.

If instead of getting "CONNECT" it got "AT DTxxx-xxxx" it wouldn't know what
to do!

Hope this helps.

PS:  This dialer seems to have been posted to Usenet at one time, but it 
IS NOT the one found in Volume 3 of the comp.sources archives at Purdue.
If anyone knows where I can find source for it I'd appreciate it.
-- 
John Plocher uwvax!geowhiz!uwspan!plocher  plocher%uwspan.UUCP@uwvax.CS.WISC.EDU