Re: Best fax modem settings to receive from multifunction devices?

I turned off compression due to Crina's and Brandy's previous suggestions. I
did not seem to make a difference.

I know that no fax will get 100% of inbound stuff, but this one gets EVERY
junk fax and not every valid fax. Figures.

The client is not happy with the results, since their HP 7110 (??) received
those faxes.

I wonder if a Brooktrout TruFax card would do better?

Gregg Hill



"SuperGumby [SBS MVP]" <not@xxxxxxxxxxx> wrote in message
news:OZLAvxkKHHA.3952@xxxxxxxxxxxxxxxxxxxxxxx
I haven't used the specific modems you refer to but,

99% of FAX software will talk to the modem at 19200. Main reason being
that FAX standards above 14k4 never really took off (people started doing
data transfers instead) and you need 19k2 DTE-DCE to support a 14k4
carrier.

The compression settings you are looking at are _MOST PROBABLY_ only
relevent to DATA through the modem. This is no big deal because FAX is
basically a bitmap image and the types of 'on the fly' compression modems
are capable of have very little if any application when FAXing.

The EC settings are purely DATA. I can't remember whether FAX (for legal
purposes) has it's own EC process or totally ignores EC, I _think_ it
totally ignores EC, purely due to legal reasons, an uncorrected stream
arrives at the receiver, noise was considered acceptable, deliberate
modification(correction) of the recvd data was not legally acceptable.
Keep in mind that FAX was legally accepted worldwide (AFAIK), this is one
of the intended 'precepts' of it's use.

By increasing the 'cancel if not connected within...' you can allow a FAX
device to negotiate a connection over bad lines to another device,,, or
you can rack up a REALLY BIG long distance bill as tx's to incorrect
numbers hold the line open for longer. Theoretically, the best strategy is
to sit there with the device's speaker on all day, for a few days, as you
time the negotiation period for each connection, time from 'off hook' to
'connected' (software can do this) and set your cancel time appropriately,
allowing for the reasonable percentage of negotiations which take longer
to fail, STUFF THEM, they have a bad FAX device and NO-ONE EVER PROMISED
FAX WOULD WORK 100% either.

Sorry, had to expand on that. It's actually more of a 'our fax device
doesn't like your fax device'. Check out your favourite 'professional,
heavy duty, dedicated, all singing...etc...' FAX device, their support
section will _not guarantee_ connection to any other device, even another
of their own.

Drivers play a part, but generally if the driver works for DATA it's OK
for FAX.

Hardware flow control is important for computer based FAX.

"Gregg Hill" <bogus@xxxxxxxxxxx> wrote in message
news:OUM67TkKHHA.1240@xxxxxxxxxxxxxxxxxxxxxxx
Hello!

I was going to start a new thread because this one is old, but the
subject remains the same, so here I am. I tried four different modems
today at my problem client on their Dell PE 830 running SBS 2003 Standard
R2. I tried the built-in serial port as well as a Siig CyberSerial PCI
16C550 dual-port serial card. I tried their current US Robotics Courier
V.Everything model 3CP3453, an older 3Com Courier V.Everything model
002806-00, an Encore ENF656-EV-CIPR, and a US Robotics Courier
V.Everything model 3453B, all with the latest firmware. I tried a ton of
different settings for COM and modem speeds, compression ON and OFF, all
with very little success until I settled on 38400 for both serial port
and modem speeds, and compression off. That seemed to work the best so
far, but I have yet to request a fax from their accountant whose Brother
MFC-8300 is one of the ones that ALWAYS fails to go through. I will do
that in the morning. I previously tried the US Robotics Courier
V.Everything model 3CP3453 with all speeds between 115200 and 9600, and
it would not receive from that damn Brother MFC, nor from several of
their other clients.

I have two clients with Dell servers (PE 2800 and PE 830) and US Robotics
Courier V.Everything external modems (the problem child noted above, and
another one with a 3CP3453). I have tried various drivers, COM and modem
speeds, etc. One client works OK with their 3CP3453, i.e., they receive
from all their customers, but I still see a few dropped faxes each day in
the logs. They don't notice it, and I am not saying anything until I
figure it at my problem child client. The other one, noted above, cannot
receive faxes from some Brother MFC devices. All the recommendations I
have seen say to use a 3Com (USR) Courier V.Everything to answer these
fax calls, but they still fail.

So my question now is, what are the most reliable settings to use to get
the SBS 2003 Standard R2 fax service to receive the most faxes using a US
Robotics Courier V.Everything modem (model 3CP3453 and/or 3453B, with the
latest firmware)?

COM port speed = ?
Modem speed = ?
Compression = ON or OFF ?
Error correction = Standard EC or Disabled ?
Cancel the call if not connected within = ?
Driver version = Courier V.Everything EXT PnP (V90-x2) or Courier
V.Everything EXT PnP (USA V90-x2 & caller ID) ?

The Courier V.Everything EXT PnP (USA V90-x2 & caller ID) choice is only
presented when I use the older 002806-00 model. The 3453B complains if I
manually choose that version after selecting "show all compatible
hardware." It's the usual "this driver may not be compatible" driver
warning.

I am about ready to heave this POS out the window!

Thank you for your help!

Gregg Hill







"Leythos" <Void@xxxxxxxxxxx> wrote in message
news:MPG.1ff513ca5db4773c98968e@xxxxxxxxxxx
In article <OPejaPXJHHA.4960@xxxxxxxxxxxxxxxxxxxx>, bogus@xxxxxxxxxxx
says...
What COM port and modem speeds do you use?

Port set to 115.2

Com 1 - the only serial port on the server.

Faxes seem to come in at 14.4k most times.

--

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remove 999 in order to email me






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Relevant Pages

  • Re: Best fax modem settings to receive from multifunction devices?
    ... 99% of FAX software will talk to the modem at 19200. ... device to negotiate a connection over bad lines to another device,,, or you ... I tried their current US Robotics Courier ... Driver version = Courier V.Everything EXT PnP or Courier ...
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  • Re: Best fax modem settings to receive from multifunction devices?
    ... I tried their current US Robotics Courier V.Everything model ... I tried a ton of different settings for COM and modem ... on 38400 for both serial port and modem speeds, ...
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