Error correction question

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DotNettie

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May 28, 2007, 10:27:58 AM5/28/07
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I have an older PC that came with a US Robotics PCI 56K fax modem. I did a
new windows XP install and it seems that some problems have arisen with my
dialup connection.

I would go to the vendor, but my PC is long out of warranty and the US
Robotics site is not very helpful with OEM modems which this one is. The
model is 0726 that I really can't locate on their site. It has a 3Com
chipset because I remember seeing that on the board.

When I booted into Windows, the modem installed itself with a generic
communications driver apparently from within windows, 5.1.2462.1 which have
determined is fall of 2001 vintage.

I generally connect in the 40's, but lately the connect speeds have been in
28000-34000 range. If I redial, then the connection will be better.

I went into device manager and queried the modem. The modem log says the
connection was established at 45333.

My question is this: the log shows that error control is off or unknown and
data compression is off or unknown. Can I fix these things, or should I even
bother. Of all the hardware in the PC, this one is still a mystery to me. I
know there are commands that can "forcefeed" the modem to do stuff, but I am
at a loss as to what commands could be useful in this case. I've gone to
various modem sites but have not been able to determine what are the proper
commends for this very generic modem.

Thanks.


Franc Zabkar

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May 28, 2007, 4:55:59 PM5/28/07
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On Mon, 28 May 2007 10:27:58 -0400, "DotNettie"
<msdimpnos...@localnet.com> put finger to keyboard and composed:

>I have an older PC that came with a US Robotics PCI 56K fax modem. I did a
>new windows XP install and it seems that some problems have arisen with my
>dialup connection.
>
>I would go to the vendor, but my PC is long out of warranty and the US
>Robotics site is not very helpful with OEM modems which this one is. The
>model is 0726 that I really can't locate on their site. It has a 3Com
>chipset because I remember seeing that on the board.

This USR page suggests that yours may be a 3CP5610, 3CP325610, or
662977-00 model:
http://www.usr.com/support/s-fcc.asp

This appears to be a photo of your modem (from Ebay listing):
http://i2.ebayimg.com/07/i/000/9a/ce/4721_1.JPG

The good news is that yours is a full hardware modem, not soft or
controllerless.

>When I booted into Windows, the modem installed itself with a generic
>communications driver apparently from within windows, 5.1.2462.1 which have
>determined is fall of 2001 vintage.
>
>I generally connect in the 40's, but lately the connect speeds have been in
>28000-34000 range. If I redial, then the connection will be better.
>
>I went into device manager and queried the modem. The modem log says the
>connection was established at 45333.
>
>My question is this: the log shows that error control is off or unknown and
>data compression is off or unknown. Can I fix these things, or should I even
>bother.

It's just a reporting issue:
http://modemsite.com/56k/x2-inf1.asp

The modem will have automatically negotiated error correction and
compression. It's just that there is no corresponding entry in your
registry that enables Dialup Networking to understand the modem's
CONNECT responses in your modemlog. To fix this, you need to reinstall
your modem with the correct INF file. I'd use the one that is supplied
with the 3CP5610.

http://www.usr.com/support/product-template.asp?prod=5610

>Of all the hardware in the PC, this one is still a mystery to me. I
>know there are commands that can "forcefeed" the modem to do stuff, but I am
>at a loss as to what commands could be useful in this case.

You can't generally force the modem to connect at speeds which are not
supported by the line conditions. In any case, even if you manage to
connect at a high speed, during the course of the dialup session the
modem will usually speedshift up or down as line conditions change.

You can see a full report of this behaviour in the modem's last call
diagnostics.

Information your modem can tell you about your connection:
http://modemsite.com/56k/diag.asp

You can sometimes improve your modem's throughput by limiting its
connect speed:
http://modemsite.com/56k/x2-linklimit.asp#3Com

>I've gone to
>various modem sites but have not been able to determine what are the proper
>commends for this very generic modem.
>
>Thanks.

IMO, the best forum for this type of question is comp.dcom.modems. A
lot of USR experts hang out there.

This is arguably the best modem troubleshooting resource:
http://modemsite.com/56k/trouble.asp

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

DotNettie

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May 28, 2007, 5:56:59 PM5/28/07
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"Franc Zabkar" <fza...@iinternode.on.net> wrote in message
news:lagm53to45pr5i6pl...@4ax.com...

Franc: Thanks very, very much for your help. The photo from Ebay looks
exactly like my modem.

I will try what you suggest and add the dcom group to my subscribed groups.

Hopefully, I will be able to work on resolving these issues.

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