Hi,

I'm having difficulty using a fax modem over VoIP (a BT Home Hub).
Their tech support have suggested I reduce the baud rate on the modem
from 14.4K to 9.6K and try as I might I can't find settings anywhere
to allow me to do that.

The modem is a Smart Link 56K, now taken over (apparently) by
www.conexant.com but their site has no useful info I can find either.
Is there a code I can send to the modem as part of its initalisation
to reduce the baud rate every time it sends?

Thanks in anticipation!

I will attempt to answer this, I hope it is the right answer.

In windows XP you can click the following

Start -> Setting (or control panel) -> control panel (if not already
clicked) -> System -> Hardware -> Device manager

now navigate down to the modems and expand the sub topic.

right click your modem and choose properties.

You should now be able to click ADVANCED and then CHANGE DEFAULT PREFERENCES

You can now change the port speed to the speed you require.

Click OK until you can click ok no more and then close all the windows you opened.

You should now be at 9600 bps modem speed.

I would also advise trying to get an updated driver for the device as
this can sometimes enable extra added functionality and compatibility.

--Keystroke-ga

---

Request for Answer Clarification by fishface76-ga on 29 Jul 2006 06:43 PDT

Hi,

I had already come across this, but Windows Help explains:

"This is the current speed shown in bits per second (bps) for the
computer-to-modem connection (not the modem-to-modem speed, which may
be limited by other links in the connection). Normally, this speed is
set correctly during installation of the modem. Changing the Maximum
Port Speed in the modem properties changes this value as well. Some
serial devices now support speeds (for example, 230 Kbps) faster than
the 115.2 Kbps currently supported by the standard serial ports
installed on most computers".

I'd already installed the most up-to-date version of the driver I
could find before asking my Google question to no avail... that's why
I'm sure the command I need to reduce the baud rate is an
initialisation string rather than something within Windows. Do you
know of such a string I can try?

---

Clarification of Answer by keystroke-ga on 30 Jul 2006 12:42 PDT

According to one forum I found, this page has the answer you need to
limit the speed.

http://www.modemsite.com/56k/x2-linklimit.asp#Pctel

--Keystroke-ga

---

Clarification of Answer by keystroke-ga on 30 Jul 2006 12:48 PDT

Looking at the amount of problems people are having with this modem
you may be better off changing it for a better modem that uses a
different chipset. I have a similar problem with an Intel based modem
I bought, it just wasn't worth my time or effort to try and fix the
problems, it was quicker to just purchase a new modem which fixed it.

--Keystrok-ga

Although this researcher tried, s/he did not answer my question at
all, which was to provide an initialisation string to limit the *fax*
speed of the modem. The suggestions to alter the port speed in
Windows, and the init strings found in the forum, have no bearing on
fax transmit or receive speeds; the forum page didn't even contain the
word "fax". The advice to buy a new modem is not really what I was
looking for, although I accept it may well be the best course of
action. I would have preferred this researcher to have not attempted
to answer something they clearly didn't know about so that another
researcher might have had the opportunity to find me an initialisation
string to try.

You could have also specified that the information given was not
enough and allowed me time to find more for you. Rating a zero without
giving good enough feed back to the researcher is not the best way to
go.

We are not magicians, we need feed back from you in order to continue
to help you. Just so you know for the future feed back from you is
also required.

--Keystroke-ga

Just to help you out 

http://answers.google.com/answers/help.html#B

" Get clarification on the answer to your question
If the answer you receive to your question is unclear for whatever
reason, you can request a clarification at no additional charge. You
should ask for a clarification if you feel the answer is incorrect or
incomplete, or if you simply want more information on your subject. To
request a clarification, go to your account page and select "My
Answered Questions". Select the question you would like clarified.
Click the "Clarify Answer" button to open the clarification window.
Select "Post Clarification" when you are done typing."

The init strings which set the speed of the modem should also control
the fax part as well.

N0 - Requires speed of the connection be that specified by the
value of S37

S37 - Desired DCE speed (line speed)

http://groups.google.com/group/comp.os.linux.misc/msg/24d5e2165e6584c9?dmode=source&hl=en

It may also help to ask your VoIP company if they support alternate
codecs, as G.711 will work best for faxing. It also looks as though a
future standard, V.150.1 will eventually solve all of your problems
but this will be a long time coming.

http://64.233.161.104/search?q=cache:CcqQnCKYz_UJ:www.commsdesign.com/design_corner/showArticle.jhtml%3FarticleID%3D16500688+V.150.1&hl=en&gl=us&ct=clnk&cd=1

http://answers.google.com/answers/faq.html#refund