Solved

WinXP with USB Modem Connection Problem

Posted on 2002-05-08
7
229 Views
Last Modified: 2013-12-27
I am having trouble dialing in to the research centre where I work with my new D Link External USB modem. I am using Windows XP Professional and I've configured the connection the same way as I did when connecting using Windows 98. I don't believe the problem is related to the D Link hardware because I am able to dial in to other sites with no problems.

When I dial in to the modem I receive the following error message:

Opening port...
Error 678: The remote computer did not respond. For further assistance ...

The D Link Modem has the following description in the General tab of the connection properties:
Modem - Conexant HCF V90 Data Fax Voice USB Modem

The modem I am trying to connect to is a:
Banksia iNTRA8 ISA Card 336 - BC5052C

TIA
0
Comment
Question by:davidrahal
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 3

Accepted Solution

by:
Snazzy_Graphics earned 100 total points
ID: 7018523
Hi. I'm a graphics guy with similar problems.

Got quite an education about this last couple of days.

Try setting up a log file for your modem in the control panel. Then look at the bottom of that and you'll see how the two modems tried to negotiate.

Although 678 says the remote machine is not answering, that may not be the whole story.

I was able to improve my connection by changing some settings using hyperterminal.

Specifically for me: AT&Nxx and AT&Uxx seem to help by changing what frequency of carrier I send; where the values xx are a table of speeds (may be different for your modem or your circumstances). I then write that (AT&W) and use an init string which employs it (AT&F).

However, what I'm talking about may be overkill for you. Before going there, make sure the other modem is answering (turn volume on and/or look at that file). Make sure cancel if not connected is checked and set a timeout of 60 seconds. In Conection > call prefs.

These HCF USB modems are apparently a bear in XP.
0
 
LVL 3

Expert Comment

by:Snazzy_Graphics
ID: 7019449
Some corrections and added info:

I've been messing around some more in Hyoerterm.

Confirmed that you can get a 678 by having &U set too high. &U is the lowest speed you are willing to connect at. Although other requirements may prevent the connection too.

To fix you can do AT&U0&N0 (<--those are zeros). That just means best speed. Then you would AT&W to write that to modem. And use ATZ1 to activate that (not F like I had earlier).

But that may well be how you are set up in the first place.

I suppose the place to start messing about is the modem advanced config tab, init string. Try it with:

First try: ATZ
2nd: AT&F
3rd: AT&F1

Those should send you through factory setting possibilities, skipping whatever XP has decided you want.
0
 
LVL 6

Expert Comment

by:st_steve
ID: 7048479
listening and learning...
0
Get MongoDB database support online, now!

At Percona’s web store you can order your MongoDB database support needs in minutes. No hassles, no fuss, just pick and click. Pay online with a credit card. Handle your MongoDB database support now!

 

Author Comment

by:davidrahal
ID: 7123267
Sorry I've taken so long to reply. I've been overseas.

I managed to get a hyperterminal talking to my modem yesterday. I didn't have any luck with my first attempts at using the AT commands. Maybe I'm not using them properly.

Should I continue asking question in the comment section of ee or do I need to contact Snazzy_Graphics directly?

TIA
0
 
LVL 3

Expert Comment

by:Snazzy_Graphics
ID: 7123828
ask away.

--Snazzy
0
 

Author Comment

by:davidrahal
ID: 7128766
I wasn't able to use the <AT&Nxx> and <AT&Uxx> commands you suggested to control the carrier speed of my modem. Instead I tried a connection using the modem modulation command which has the following syntax:

AT+MS=<carrier>,<automode>,<min_tx_rate>,<max_tx_rate>,
<min_rx_rate>,<max_rx_rate> where <carrier> is the Carrier code for modulation type (V34 = V.34, V90 = V.90, and K56 = K56): <automode> 0 = Automode Disabled, 1 = Automode Enabled: <min_tx_rate><min_rx_rate><max_tx_rate><max_rx_rate>      are the Minimum And Maximum Data Rate for Transfer and Recieve Respectively

I had a look at the Banksia Modem Manual (receiving modem)and it only supports V34 carrier. I was able to connect using:

AT+MS=V34,1,75,28800,75,336000

I'm not entirely happy with crippling the modem to access this modem because I also connect to other ISPs. My understanding is that the modem tries to connect with the fastest modulation first then tries other modulations until it finds one that works. Maybe I need to change a parameter to allow the USB modem more time to connect to the Banksia modem at different modulations.

I'll post more information if I find an additional parameter I can change.

Thanks for you help on this. I was floundering until you pointed me in the right direction.

0
 

Expert Comment

by:TheBadMan
ID: 7941867
A trick I used with Win 98 (don't know if it will work with XP) to get 2 PC's connected modem-modem, was to append three comma's  after the phone number in the dial-up adapter eg. "xxxx,,," This forced the modems to wait a little before connecting, at least that is my understanding.
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article will step through configuring a SonicWALL appliance to utilize an internal DHCP server for Global VPN Client (GVC) hosts.  There are times when using an external (external to the SonicWALL) DHCP server, such as Windows Servers, isn’t pr…
This article is a how to to configure a UCS Ethernet-uplink portchannel via the console. It is easy to do and can be done quite quickly. In certain versions of the UCS manager the portchannel has issues coming up and this is a workaround. I am…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
If you’ve ever visited a web page and noticed a cool font that you really liked the look of, but couldn’t figure out which font it was so that you could use it for your own work, then this video is for you! In this Micro Tutorial, you'll learn yo…
Suggested Courses

632 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question