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| Author |
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Markus R. Keßler
Guest
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 Posted: Mon Jan 15, 2007 11:09 pm Post subject: 56k modem not accessible by older fax programs? |
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Dear all,
I have the following problem:
I have a Creatix 33.6k serial modem connected to a windows 3.11 box and
it runs without any problem.
Now I tried to replace it with a new Devolo 56k / V.92 modem which is
connected in the same way to the pc.
I can access it under Windows as well as under Dos and send AT commands.
In internet mode i.e. driven by Trumpet winsock, it runs fast and
stable. So, at least electrically it seems to be ok, but, it refuses to
run in fax mode. I tried Winfax Pro 3.0, Winfax Pro 4.0 and Trio
Datafax.
Datafax detects it on com2 and the installation routine runs and ends
successfully but Datafax cannot open it for sending nor for receiving
faxes anyway.
The test utility coming along with Winfax Pro 4.0 creates a report file
which says the following:
/*----------------------------------------------------------------------
Serial mouse detected on COM1
COM2 is available for testing
COM2 selected for testing
COM2 Opening...
COM2 is open
COM2 Initializing...
COM2 initialized at 2400
Address and IRQ...
(2F8h, IRQ3)
COM2 Response Test...
[ATE0]
->
[ATE0]
->
Either there is no modem on the selected port or it is not responding.
COM2 Test Results
Delrina TEST did not detect a modem on this port.
----------------------------------------------------------------------*/
My first assumption was that perhaps there were slight modifications to
the protocol to access a modem for fax mode in the past years and those
programs like Winfax 3 or 4 cannot handle, but for instance a Longshine
modem which I also tried is not older than the Devolo and it runs, and
so also the serial port is definitively ok.
Any ideas what could be the cause?
Best regards,
Markus
--
Please reply to group only.
For private email please use http://www.dipl-ing-kessler.de/email.htm |
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Aaron Leonard
Guest
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| Posted: Wed Jan 17, 2007 3:10 am Post subject: Re: 56k modem not accessible by older fax programs? |
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On Mon, 15 Jan 2007 18:09:35 +0100, "Markus R. Keßler" <dimke.fax@uni.de> wrote:
~ Dear all,
~
~ I have the following problem:
~
~ I have a Creatix 33.6k serial modem connected to a windows 3.11 box and
~ it runs without any problem.
~
~ Now I tried to replace it with a new Devolo 56k / V.92 modem which is
~ connected in the same way to the pc.
~
~ I can access it under Windows as well as under Dos and send AT commands.
~
~ In internet mode i.e. driven by Trumpet winsock, it runs fast and
~ stable. So, at least electrically it seems to be ok, but, it refuses to
~ run in fax mode. I tried Winfax Pro 3.0, Winfax Pro 4.0 and Trio
~ Datafax.
~
~ Datafax detects it on com2 and the installation routine runs and ends
~ successfully but Datafax cannot open it for sending nor for receiving
~ faxes anyway.
~
~ The test utility coming along with Winfax Pro 4.0 creates a report file
~ which says the following:
~
~ /*----------------------------------------------------------------------
~
~ Serial mouse detected on COM1
~ COM2 is available for testing
~
~ COM2 selected for testing
~
~ COM2 Opening...
~ COM2 is open
~
~ COM2 Initializing...
~ COM2 initialized at 2400
~
~ Address and IRQ...
~ (2F8h, IRQ3)
~
~ COM2 Response Test...
~ [ATE0]
~ ->
~ [ATE0]
~ ->
~ Either there is no modem on the selected port or it is not responding.
~
~ COM2 Test Results
~ Delrina TEST did not detect a modem on this port.
~ ----------------------------------------------------------------------*/
~
~ My first assumption was that perhaps there were slight modifications to
~ the protocol to access a modem for fax mode in the past years and those
~ programs like Winfax 3 or 4 cannot handle, but for instance a Longshine
~ modem which I also tried is not older than the Devolo and it runs, and
~ so also the serial port is definitively ok.
~
~ Any ideas what could be the cause?
~
~ Best regards,
~
~ Markus
Markus,
From what this log shows, your Winfax Pro program isn't even getting far
to figure out whether your new modem can or can't do fax. It looks like
it's just setting the COM2 port to 2400 bps (which is way slow btw), sending
an ATE0 command (echo off), and, I assume, expecting to get an OK back.
Apparenly the modem isn't sending back OK ...
If you try to perform the same sequence by hand, do you get an OK back from E0?
Aaron |
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Moe Trin
Guest
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| Posted: Wed Jan 17, 2007 8:05 am Post subject: Re: 56k modem not accessible by older fax programs? |
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On Mon, 15 Jan 2007, in the Usenet newsgroup comp.dcom.modems, in article
<45ABB54F.20A4F480@uni.de>, Markus R. Keßler wrote:
| Quote: | I have a Creatix 33.6k serial modem connected to a windows 3.11 box and
it runs without any problem.
Now I tried to replace it with a new Devolo 56k / V.92 modem which is
connected in the same way to the pc.
I can access it under Windows as well as under Dos and send AT commands.
|
so apparently your hardware configuration is compatible.
| Quote: | Datafax detects it on com2 and the installation routine runs and ends
successfully but Datafax cannot open it for sending nor for receiving
faxes anyway.
|
Make sure you are using the correct modem init string, and have set any
required 'S' registers correctly. I have no idea what they might be, but
anything strange should be detailed in the manual for the modem.
| Quote: | The test utility coming along with Winfax Pro 4.0 creates a report file
which says the following:
COM2 Initializing...
COM2 initialized at 2400
|
Does the modem even speak that slowly? Most 56k modems want to see a
UART speed of 115200 BPS, (with alternatives of 57600, 38400, 19200 and
perhaps 9600 BPS), but your serial port needs a 16550A or equivalent
UART (generally, something built after 1993) to speak that fast.
| Quote: | My first assumption was that perhaps there were slight modifications to
the protocol to access a modem for fax mode in the past years and those
programs like Winfax 3 or 4 cannot handle, but for instance a Longshine
modem which I also tried is not older than the Devolo and it runs, and
so also the serial port is definitively ok.
|
You'd have to look at the modem manual - in some cases this is an "S"
register setting. The basic commands to talk to the modem, and get
it to dial a telephone number are not likely to be any different.
Old guy |
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Fred McKenzie
Guest
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| Posted: Thu Jan 18, 2007 12:00 am Post subject: Re: 56k modem not accessible by older fax programs? |
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In article <slrneqr12l.fne.ibuprofin@compton.phx.az.us>,
ibuprofin@painkiller.example.tld (Moe Trin) wrote:
| Quote: | On Mon, 15 Jan 2007, in the Usenet newsgroup comp.dcom.modems, in article
45ABB54F.20A4F480@uni.de>, Markus R. Keßler wrote:
The test utility coming along with Winfax Pro 4.0 creates a report file
which says the following:
COM2 Initializing...
COM2 initialized at 2400
Does the modem even speak that slowly? Most 56k modems want to see a
UART speed of 115200 BPS, (with alternatives of 57600, 38400, 19200 and
perhaps 9600 BPS), but your serial port needs a 16550A or equivalent
UART (generally, something built after 1993) to speak that fast.
|
Markus & Moe-
Please pardon my ignorance, but I thought Fax operated at 2400 Baud. I
know that the speed between the modem and the computer can be a
different speed for ASCII data, but perhaps the Fax software prefers
2400.
Otherwise, it sounds like that particular modem does not function in Fax
mode. Are there any DIP switches on it? If so, they may need to be set
correctly to enable the Fax function.
Fred |
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Moe Trin
Guest
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| Posted: Fri Jan 19, 2007 6:51 am Post subject: Re: 56k modem not accessible by older fax programs? |
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On Wed, 17 Jan 2007, in the Usenet newsgroup comp.dcom.modems, in article
<fmmck-A330F7.13002817012007@nntp.aioe.org>, Fred McKenzie wrote:
| Quote: | Please pardon my ignorance, but I thought Fax operated at 2400 Baud. I
know that the speed between the modem and the computer can be a
different speed for ASCII data, but perhaps the Fax software prefers
2400.
|
Do be careful about the difference between 'Baud' (audio tone changes
per seconds) and 'BPS' which accounts for fancy modulation schemes. A
so-called 56k modem (56000 BPS) can't be running faster than 3500 Baud,
but each audio change may encode one of 16 possible bit patterns
(where 3500 x 16 = 56000). Another term: trellis code modulation.
Most of the modems I have will do v.17 which is a speed of 14.4k. You
might find more information by going to google, and searching for the
keywords "fax speed". Also look for 'v.29', 'v.27ter', and 'v.21'
which should pull up the standard speeds used by many fax-modems.
| Quote: | Otherwise, it sounds like that particular modem does not function in Fax
mode. Are there any DIP switches on it? If so, they may need to be set
correctly to enable the Fax function.
|
I can't answer for the O/P, but the 8 DIP switches on my USRs only
effect how the modem talks to the computer over the serial link, except
for the one that enables/disables "Auto Answer".
Old guy |
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Markus R. Keßler
Guest
|
| Posted: Sat Jan 20, 2007 11:33 pm Post subject: Re: 56k modem not accessible by older fax programs? |
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On Tue, 16 Jan 2007 14:10:21 -0700, Aaron Leonard <Aaron@Cisco.COM>
wrote:
| Quote: | On Mon, 15 Jan 2007 18:09:35 +0100, "Markus R. Keßler" <dimke.fax@uni.de> wrote:
~ Dear all,
~
~ I have the following problem:
~
~ I have a Creatix 33.6k serial modem connected to a windows 3.11 box and
~ it runs without any problem.
~
~ Now I tried to replace it with a new Devolo 56k / V.92 modem which is
~ connected in the same way to the pc.
~
~ I can access it under Windows as well as under Dos and send AT commands.
~
~ In internet mode i.e. driven by Trumpet winsock, it runs fast and
~ stable. So, at least electrically it seems to be ok, but, it refuses to
~ run in fax mode. I tried Winfax Pro 3.0, Winfax Pro 4.0 and Trio
~ Datafax.
~
~ Datafax detects it on com2 and the installation routine runs and ends
~ successfully but Datafax cannot open it for sending nor for receiving
~ faxes anyway.
~
~ The test utility coming along with Winfax Pro 4.0 creates a report file
~ which says the following:
~
~ /*----------------------------------------------------------------------
~
~ Serial mouse detected on COM1
~ COM2 is available for testing
~
~ COM2 selected for testing
~
~ COM2 Opening...
~ COM2 is open
~
~ COM2 Initializing...
~ COM2 initialized at 2400
~
~ Address and IRQ...
~ (2F8h, IRQ3)
~
~ COM2 Response Test...
~ [ATE0]
~ -
~ [ATE0]
~ -
~ Either there is no modem on the selected port or it is not responding.
~
~ COM2 Test Results
~ Delrina TEST did not detect a modem on this port.
~ ----------------------------------------------------------------------*/
~
~ My first assumption was that perhaps there were slight modifications to
~ the protocol to access a modem for fax mode in the past years and those
~ programs like Winfax 3 or 4 cannot handle, but for instance a Longshine
~ modem which I also tried is not older than the Devolo and it runs, and
~ so also the serial port is definitively ok.
~
~ Any ideas what could be the cause?
~
~ Best regards,
~
~ Markus
Markus,
From what this log shows, your Winfax Pro program isn't even getting far
to figure out whether your new modem can or can't do fax. It looks like
it's just setting the COM2 port to 2400 bps (which is way slow btw), sending
an ATE0 command (echo off), and, I assume, expecting to get an OK back.
Apparenly the modem isn't sending back OK ...
If you try to perform the same sequence by hand, do you get an OK back from E0?
Aaron
|
Hi Aaron,
when accessing the modem via terminal application it gets the "ATE0"
and sends back an "OK". This is after initialisation with a standard
Hayes init string for generic 33k6 modems.
Also, I assume that the Winfax installer tries different com interface
bitrates, and, when running into trouble, it finally falls back to
2400, but even this does not work.
I'll try to get a serial port monitor application to view what's
exactly coming in and out.
Many thanks,
best regards,
Markus
--
Please reply to group only.
For private email please use http://www.dipl-ing-kessler.de/email.htm |
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