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WinXP with USB Modem Connection Problem

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

ASKER CERTIFIED SOLUTION

Snazzy_Graphics

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Snazzy_Graphics

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.

st_steve

listening and learning...

davidrahal

ASKER

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

Snazzy_Graphics

ask away.

--Snazzy

davidrahal

ASKER

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.

TheBadMan

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.