Tech Support > Computer Hardware > Modems > modem dropping connection
modem dropping connection
Posted by Panos Papadopolous on June 25th, 2004


After working fine for a long time, my internet connection keeps dropping
the carrier. I will try to drop the modem log into this note, and hope
someone can give me some advice how to fix the problem.

I have disenabled Norton Anti-Virus and ZoneLabs ZoneAlarmPro.

The connection just dropped and I reconnected. Here is newest log


06-25-2004 14:05:17.246 - File: C:\WINNT\System32\tapisrv.dll, Version
5.1.2600
06-25-2004 14:05:17.266 - File: C:\WINNT\System32\unimdm.tsp, Version
5.1.2600
06-25-2004 14:05:17.266 - File: C:\WINNT\System32\unimdmat.dll, Version
5.1.2600
06-25-2004 14:05:17.266 - File: C:\WINNT\System32\uniplat.dll, Version
5.1.2600
06-25-2004 14:05:17.286 - File: C:\WINNT\System32\drivers\modem.sys, Version
5.1.2600
06-25-2004 14:05:17.286 - File: C:\WINNT\System32\modemui.dll, Version
5.1.2600
06-25-2004 14:05:17.296 - File: C:\WINNT\System32\mdminst.dll, Version
5.1.2600
06-25-2004 14:05:17.296 - Modem type: U.S. Robotics V.92 PCI Faxmodem
06-25-2004 14:05:17.296 - Modem inf path: oem12.inf
06-25-2004 14:05:17.296 - Modem inf section: ModemX
06-25-2004 14:05:17.296 - Matching hardware ID:
pci\ven_16ec&dev_2f00&subsys_010a16ec&rev_01
06-25-2004 14:05:17.666 - 115200,8,N,1, ctsfl=1, rtsctl=2
06-25-2004 14:05:17.666 - Initializing modem.
06-25-2004 14:05:17.676 - Send: AT<cr>
06-25-2004 14:05:17.676 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:17.676 - Interpreted response: OK
06-25-2004 14:05:17.686 - Send:
AT&F&A0X4E0V1S0=0&C1&D2+MR=2;+DR=1;+ER=1;W2<cr>
06-25-2004 14:05:17.836 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:17.836 - Interpreted response: OK
06-25-2004 14:05:17.856 - Send: ATS7=60M1+ES=3,0,2;+DS=3;+IFC=2,2;X4<cr>
06-25-2004 14:05:17.867 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:17.867 - Interpreted response: OK
06-25-2004 14:05:17.867 - Waiting for a call.
06-25-2004 14:05:17.877 - Send: at+vcid=1<cr>
06-25-2004 14:05:17.887 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:17.887 - Interpreted response: OK
06-25-2004 14:05:17.897 - Send: ATS0=0<cr>
06-25-2004 14:05:17.907 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:17.907 - Interpreted response: OK
06-25-2004 14:05:17.997 - 115200,8,N,1, ctsfl=1, rtsctl=2
06-25-2004 14:05:18.007 - Initializing modem.
06-25-2004 14:05:18.017 - Send: AT<cr>
06-25-2004 14:05:18.027 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:18.027 - Interpreted response: OK
06-25-2004 14:05:18.037 - Send:
AT&F&A0X4E0V1S0=0&C1&D2+MR=2;+DR=1;+ER=1;W2<cr>
06-25-2004 14:05:18.187 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:18.187 - Interpreted response: OK
06-25-2004 14:05:18.197 - Send: ATS7=60M1+ES=3,0,2;+DS=3;+IFC=2,2;X4<cr>
06-25-2004 14:05:18.207 - Recv: <cr><lf>OK<cr><lf>
06-25-2004 14:05:18.207 - Interpreted response: OK
06-25-2004 14:05:18.207 - Dialing.
06-25-2004 14:05:18.217 - Send: ATDT###-###-####<cr>
06-25-2004 14:05:44.585 - Recv: <cr><lf>+MCR: V92<cr><lf>
06-25-2004 14:05:44.585 - Interpreted response: Informative
06-25-2004 14:05:44.585 - Recv: <cr><lf>+MRR: 49333<cr><lf>
06-25-2004 14:05:44.585 - Interpreted response: Informative
06-25-2004 14:05:45.146 - Recv: <cr><lf>+ER: LAPM<cr><lf>
06-25-2004 14:05:45.146 - Interpreted response: Informative
06-25-2004 14:05:45.146 - Recv: <cr><lf>+DR: V42B<cr><lf>
06-25-2004 14:05:45.146 - Interpreted response: Informative
06-25-2004 14:05:45.146 - Recv: <cr><lf>CONNECT 49333<cr><lf>
06-25-2004 14:05:45.146 - Interpreted response: Connect
06-25-2004 14:05:45.146 - Connection established at 49333bps.
06-25-2004 14:05:45.146 - Error-control on.
06-25-2004 14:05:45.146 - Data compression on.
06-25-2004 14:06:15.149 - Read: Total: 601, Per/Sec: 17, Written: Total:
1103, Per/Sec: 33



Posted by Art Jackson on June 26th, 2004


Panos Papadopolous wrote:

That results in a lot of error correction and lower overall throughput,
and also can cause disconnects. Try lowering the top speed a notch or
two, to stabilize the connection. In the DUN configuration, Connection,
Advanced, Extra Settings box, add &U10&N32 to cap the top speed to
48,000. If that improves the stability some, but doesn't stop the
disconnects, try lowering the &Nxx value to 31 or 30. Initial connection
speed is not a good way to judge performance. Actual throughput and
stability of the connection after it is established, is the true measure
of performance.
If you could use a terminal program to connect direct to the modem's COM
port, you can get the connection diagnostics from the modem, right after
a disconnect has occurred. Issue the command ATI6I7I11 to the modem,
then post the results here for us to look at. Good luck.


--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.

Posted by Franc Zabkar on June 26th, 2004


On Sat, 26 Jun 2004 15:14:41 +0000, Art Jackson <nospam@ringading.buz>
put finger to keyboard and composed:

The "W2" in the init string suggests that the modem is based on a
rebadged Conexant chipset. If so, then the "+MS=12,,,48000" command
may be applicable in this instance.

Further investigation reveals that the 16EC vendor ID belongs to USR,
and the 2F00 device ID identifies the "HSFi" chipset, ie a softmodem.

To download Conexant's "list modem application", go to ...

http://www.conexant.com/support/md_d...ssistance.html

.... and get the following:

http://www.conexant.com/support/files/listmodem_app.zip
http://www.conexant.com/support/file...odem_guide.pdf


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

Posted by Art Jackson on June 27th, 2004


Franc Zabkar wrote:
You're right Franc, I didn't notice that it was one of those off-breed
USR modems with the conexant chipset. Good luck.


--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.

Posted by Panos Papadopolous on June 27th, 2004


Thanks Art and Franc for comments.

It is going to take me a while to digest them.

Will let you know what happens re problem.

Can you tell me how to print out separately just each of your answers
without also printing all the modem log I posted?


"Art Jackson" <nospam@ringading.buz> wrote in message
news:3ngDc.1838$5N4.752@bignews4.bellsouth.net...


Posted by Art Jackson on June 27th, 2004


Panos Papadopolous wrote:
Just put your mouse pointer on the first letter you want to copy, then
hold down your left mouse button and drag it down to where you want to
stop, then release the left button. That should highlight the desired
information. place your mouse in the highlighted area, then Click the
RIGHT button. From the menu that comes up, select Copy. That will put
the desired information in your clipboard. Next open up Notepad or
Wordpad. Place the mouse pointer in the window, RIGHT click and select
Paste from the menu. That should then place the desired information in
the window, and then you can save it, print it, or edit it, as needed.
In Windows Help, select "Copying Help Topics" and follow the
instructions there for the many copy, cut, and paste methods. Good luck.



--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.

Posted by Panos Papadopolous on June 27th, 2004


Hi Art!

How do I find out what all the different number and letter variations
following an AT signal actually mean?

I vaguely recall, (back in Win98 days), I used to query modem using AT ? or
some number/

What do I do now, and exactly how do I query the modem>

Please explain in chronological detail for XPPro.

Thanks in advance.


Posted by Franc Zabkar on June 27th, 2004


On Sun, 27 Jun 2004 14:32:51 -0400, "Panos Papadopolous"
<Panos@athens.net> put finger to keyboard and composed:

http://members.optusnet.com.au/~fzab...2_04052001.pdf


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

Posted by Panos Papadopolous on June 28th, 2004


Thanks, Art, it worked ok.


"Art Jackson" <nospam@ringading.buz> wrote in message
news:%eDDc.2024$s%3.1539@bignews1.bellsouth.net...


Posted by Panos Papadopolous on July 4th, 2004



"Art Jackson" <nospam@ringading.buz> wrote in message
news:%eDDc.2024$s%3.1539@bignews1.bellsouth.net...
OK, Art & others, here are my conclusions..

I use a dial-up connection to get on Internet.

I have 3 computers, each has a modem, all are connected to the same feed-in
phone line at the wall. #1 and #3 use XP OS, #2 uses Win98se for old games.

I live in Tampa, Florida at same place since 1951. I have seen many, many
thunderstorms in last 63 years BUT I doubt that any previously were as Close
and Bad as what we've experienced for the last 3 weeks.

Right now only 1 of my 3 modems is working properly, #2. Just luck I guess.
From now on I am going to pull out my wall phone feed and my wall electric
feed when storms approach and quit riding my lucky streak.

My main computer modem works but drops the ISP feed frequently enough to be
annoying. I plan to replace this modem.

My second computer checks out ok under XP's diagnostic system, but keeps
saying "no dial tone", when I try to dial up.I last lost a modem to
lightning surges about 10 years ago, and it showed the same symptoms. I plan
to replace the modem.

Thanks for comments. Appreciate your suggestions.

I like USR internal Winmodems, and find they usually work OK if installed
properly, BUT when lightning takes them out there is no point to trying to
fix them.




Posted by Art Jackson on July 5th, 2004


Panos Papadopolous wrote:
That's a good policy. I do that routinely here, if there is any threat
of thunderstorms moving in, or if I am going out of town.

That's a typical symptom of a modem's line interface chip/circuit that
has been damaged by a surge. Unfortunately, Windows modem diagnostics
does not test that part of the modem, only that part that interfaces to
the computer.


other Electronics places that will work to repair any newer modems.
I've never owned one, but I've read where the Zoom modems have a heavier
duty protection circuit on the phone line interface.


--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.

Posted by Panos Papadopolous on July 5th, 2004


Thanks for reply, Art.

"Art Jackson" <nospam@ringading.buz> wrote in message
news:U03Gc.6984$o62.1819@bignews2.bellsouth.net...


Posted by Panos Papadopolous on July 9th, 2004



"Panos Papadopolous" <Panos@athens.net> wrote in message
news:ccbpqt01bp2@enews3.newsguy.com...
Hi Art!

Can't remember if I e-mailed you that I replaced the modem in my computer
#1, and now it works 100% OK! Connects usually at 50k+ and does not drop
connection unless told to disconnect by me.

Installed the COMPUSA equivalent of the USR V92 56k PCI Internal Modem
damaged by lightning surge.



Posted by Art Jackson on July 10th, 2004


Panos Papadopolous wrote:



--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.


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