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- Path: sparky!uunet!usc!cs.utexas.edu!uwm.edu!rutgers!rochester!cantaloupe.srv.cs.cmu.edu!news
- From: fitz@frc2.frc.ri.cmu.edu (Kerien Fitzpatrick)
- Newsgroups: comp.sys.sun.apps
- Subject: Re: SupraFaxmodem & NetFax
- Keywords: fax, Supra
- Message-ID: <1992Jul28.152727.241502@cs.cmu.edu>
- Date: 28 Jul 92 15:27:27 GMT
- References: <Bs27nL.7HA@wsrcc.com>
- Reply-To: fitz@frc2.frc.ri.cmu.edu
- Organization: Field Robotics Center, Carnegie Mellon University
- Lines: 176
- Nntp-Posting-Host: dirt.frc.ri.cmu.edu
-
- In article 7HA@wsrcc.com, wolfgang@wsrcc.com (Wolfgang S. Rupprecht) writes:
- > fitz@frc2.frc.ri.cmu.edu (Kerien Fitzpatrick) writes:
- > >Is anyone else trying to use one of the new SupraFaxmodem V.32bis modems
- > >with NetFax 2.1. I am already using NetFax with an Everex EverFax modem
- > >and everything works fine. When I try to use the Supra I get one strange
- > >result. The output on the receiving end is two pages long (for each page).
- > >All the text is just stretched vertically. I've checked the parameters sent
- > >to the remote fax and everything is the same as for the Everex. The only
- > >thing I could think of is that the density ( #lpi) was wrong, but it is
- > >correct. If anyone else has or is trying to get this combination working
- > >I would like to hear about their results.
- >
- Well, after significant perusal of poor documentation on almost all fronts
- (maybe there is no such thing as "good" documentation) we did find our
- problems. It seems that the Supra does not know by default its maximum
- fax capabilities. It did indeed have low resolution set. It now works
- much better with NetFax than the suggested Everex faxmodem.
-
- At this time we do have a modified version of NetFax running with the Supra.
- Hopefully in the near future we will complete our effort of fixing up
- NetFax and release our changes. Please do not send email requesting the
- changes at this time. Once completed I will make all the diff files available
- for others that wish to use this.
-
- > Another Supra V.32/faxmodem victim. Join the club.
- >
- > -*- mode: text -*-
- > ###############################################################################
- > ## ##
- > ## File: BUGS ##
- > ## Author: Wolfgang S. Rupprecht <wolfgang@wsrcc.com> ##
- > ## Created: Wed May 13 22:39:11 PDT 1992 ##
- > ## Contents: Supra bugs
- > ## ##
- > ## Copyright (c) 1992 Wolfgang S. Rupprecht. ##
- > ## All rights reserved. ##
- > ## ##
- > ## $Header$ ##
- > ###############################################################################
- >
- > Supra V.32bis modem
- > MODEM #14E-002800
- >
- > 1) During fax transmission DCD is low. This makes using HW flow
- > problematic.
- >
- > (Sunbug: Due to Sun OS bugs rcv is off if HW flow is enabled
- > and CD is off. HW flow needs to be on for page transmission.
- > Technically this follows the RS-232 standard. But why is it
- > only followed if (outgoing) HW flow is active?)
- >
- > 2) FAX doesn't hang up if DTR is low. &D2 or &D3 mode.
- >
- > fax will actually stay Off Hook with *NO* modem lines
- > active either in or out.
- >
- > 3) Manual claims that you can't auto-reload params on DTR low *and*
- > have hang-up on DTR low. (feature clash problem &D2 &D3)
- >
- > Having both is really needed for a robust system.
- >
- > This may just be a documentation bug. The modem does appear
- > to drop an active connection when DTR drops. (Thanks to John
- > Hood for pointing this out.)
- >
- > 4) Can't lock computer-modem baud rate to known value on incoming
- > (dialin) phone connection.
- >
- > When the modem powers up the computer-modem buad rate is
- > undefined. The modem appears to track any computer to modem
- > output or line noise and use that to "autobaud" to a new
- > connection rate. Incoming calls are subjected to whatever
- > baud rate the modem last saw (or thought it saw) on the last
- > outgoing connection.
- >
- > Perhaps after a DTR induced reset the baud rate is reset to
- > the speed in use for the last &w command. I must check
- > this (but how????)
- >
- > 5) Carrier loss to CD delay is a constant ~ 20 seconds. Register s10
- > has no effect. (ditto for s9)
- >
- > This is only in modem mode. CD never appears in fax mode!
- >
- > 6) busy detection is buggy. Often one gets voice answers that
- > generate a "busy". Other times a real busy isn't detected.
- >
- > I did a sleep and quick redail on BUSY, until I noticed that
- > BUSY was being detected for an outgoing voicemail message.
- >
- > 7) sending +FET=2 doesn't generate an OK command reply.
- >
- > out: AT+FET=2
- > in: +FPTS: 1
- > in: +FHNG: 0
- > AT+FET=2 failed - timeout
- >
- > 8) wait for carrier register s37 = 5 has no effect in fax mode, after
- > ATA command. We will wait for quite a while.
- >
- > 9) The ATA command will not return OK or ERROR after +FCON. Remote
- > site eventually drops line.
- >
- > This means class 2 receive doesn't work appear to at all.
- >
- > 10) Supra appearently uses the FDCC VR values instead of the FDT VR
- > value for each transfer. This leads to double/half size pages
- > of printout.
- >
- > 11) Supra answers phone even if DTR is low. (eg. when S0=1, &D3)
- > DTR should inhibit any modem action, and hold the modem in a
- > reset state.
- >
- > 12) If incoming call disconnects before the speed negotiation completes
- > (as in a voice call) the Supra will then lock onto the
- > following dialtone and claim "300" on the display. The modem
- > appears to eventually go back on hook. But I wonder how long
- > it might "talk" to the dialtone.
- >
- > 13) Modem often has trouble locking onto a trailblazer (at 2400 baud)
- > located on a second phone line right next to it.
- >
- > 14) The ST scan Fax line scan time is negotiated up to max setting for
- > no appearent reason. On a fax send send the other side can
- > claim a scan time of 4. I claim a scan time of 0 (or 4). The
- > Supra and Fax then negotiate a 7!
- >
- > 15) If FAA=1 Supra doesn't answer adaptively as either FAX or Data
- > modem. If FCLASS=2 the modem will not answer data calls.
- >
- > out: AT+FCLASS=2
- > in: OK
- > out: AT+FAA=1
- > in: OK
- > out: AT+FCR=1
- > in: OK
- > in: RING
- > out: ATA
- > in: +FHNG: 1
- > in: OK
- >
- > 16) AT+FBUG=1 doesn't turn on debuging. Not technically a bug, but
- > certainly not a feature either.
- >
- > 17) Writing to the Supra immediately after DTR goes high, after a
- > DTR-low reset has taken place, will leave the modem in a
- > confused state. Eeprom parameters are not correctly reloaded.
- >
- > ---------
- > from the net:
- > ---------
- >
- > n1) Spkr volume setting L0-L3 don't have any effect. Needs PC board
- > fix.
- >
- > n2) The -,*,) LAPM/MNP commands don't work. Will be a ROM fix.
- >
- > n3) Supra never originates fallback/fallforward speed changes. Two
- > Supras talking on a bad line won't ever negotiate for a better
- > connection.
- >
- >
- >
- >
- > --
- > Wolfgang Rupprecht wolfgang@wsrcc.com (or) wsrcc!wolfgang
- > Snail Mail: 39469 Gallaudet Drive, Fremont, CA 94538-4511
-
-
-
-
- ---
- Kerien Fitzpatrick Pittsburgh, PA 15213
- Field Robotics Center (412)268-6564
- The Robotics Institute Internet: fitz@frc.ri.cmu.edu
- Carnegie Mellon University
-