Question

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Consistent USB modem issues.

By darah.shawn ·
I am currently using a USB modem (aircard) to connect to the internet via Alltel Wireless.

Anywhere from 30 seconds to 30 minutes, the modem behaves as if I have physically disconnected/reconnected. What's odd, though, is that Device Manager shows no issues or conflicts during this time. It's as if the modem completely freezes, then resets itself.

I was having this problem previously on XP Pro x64 edition, but I just performed a clean install of Vista 64-bit last night and am having the same issues. I've gone through uninstalling/reinstalling drivers and software to no avail, USB Root Hubs are not turning off devices to save power, mobo and chipset are up to date, and I even purchased a new USB card thinking it had gone bad.

These are brand new cards (I have been through three, thinking the cards had gone bad). Every card does the same thing. My ISP refuses to be of any assistance at this point, and I'd like to be able to use my main PC instead of my laptop on a daily basis.

Any suggestions would be greatly appreciated - the other info is as follows:

AMD Athlon 64 X2 4800+
2GB RAM
Asus A8N-E mobo
Vista Ultimate 64-bit

Event Viewer information just prior to "disconnect":

Log Name: System
Source: PlugPlayManager
Date: 3/4/2009 7:12:10 AM
Event I 12
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: ******
Description:
The device 'PANTECH UM175AL WWAN Driver' (USB\VID_106c&PID_3715&MI_03\7&6494a93&0&8515) disappeared from the system without first being prepared for removal.

Log Name: System
Source: RemoteAccess
Date: 3/4/2009 7:10:41 AM
Event I 20268
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: ******
Description:
CoID={6A3305EF-E798-4800-B8FD-3B7F82EEECB5}: The connection to Alltel Wireless Internet made by user **********@alltel.net using device COM3 was disconnected.

Log Name: System
Source: Tcpip
Date: 3/4/2009 7:10:32 AM
Event I 4202
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: ******
Description:
The system detected that network adapter Alltel Wireless Internet was disconnected from the network and its network configuration has been released. If the network adapter was not disconnected, this may indicate that it has malfunctioned. Try updating the driver for the network adapter.

Log Name: System
Source: Microsoft-Windows-User-PnP
Date: 3/4/2009 7:09:06 AM
Event I 20003
Task Category: None
Level: Information
Keywords:
User: SYSTEM
Computer: ******
Description:
Driver Management has concluded the process to add Service tunnel for Device Instance ID ROOT\*6TO4MP\0000 with the following status: 0.

Log Name: System
Source: Microsoft-Windows-User-PnP
Date: 3/4/2009 7:09:04 AM
Event I 20003
Task Category: None
Level: Information
Keywords:
User: SYSTEM
Computer: ******
Description:
Driver Management has concluded the process to add Service tunnel for Device Instance ID ROOT\*ISATAP\0002 with the following status: 0.

Log Name: System
Source: Tcpip
Date: 3/4/2009 7:09:03 AM
Event I 4201
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: ******
Description:
The system detected that network adapter Alltel Wireless Internet was connected to the network, and has initiated normal operation.

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All Answers

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A shot inthe dark

by seanferd In reply to Consistent USB modem issu ...

Can you try this?

Right click the Local Area Connection icon in the system tray notification area, click Open network connections. Right-click your Local Area Connection in the list, and select Properties. Click Configure. Select the Power Management tab. Uncheck the box marked "Allow the computer to turn off this device to save power". Click OK until all opened dialog boxes close.

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If only it were that easy...

by darah.shawn In reply to A shot inthe dark

There are no Power Management options. I believe that's because this is a USB modem, so it goes through the USB Root Hubs' Power Management. I've got all of those unchecked, though.

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Check also in BIOS setup

by seanferd In reply to If only it were that easy ...

perhaps a setting on the USB ports is interfering, if available.

I was rather hoping that you'd have got several other responses by now.

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OK, I've just seen this

by seanferd In reply to If only it were that easy ...

Do you need IPv6 enabled? If not, try unbinding it from the AirCard.

edit: Say, can you determine the model of the AirCard?

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Modem is locked down

by darah.shawn In reply to OK, I've just seen this

Unfortunately Alltel is a pain, and locks the modem down to prevent any changes. I am using a Pantech/UTStarcom UM175AL.

I also did a clean install of Vista Ultimate 32-bit to check for incompatibility with 64-bit OS's. Still no go.

As far as BIOS is concerned, I have tried both "PnP OS" checked yes and no, I've also enabled and disabled the BIOS assigning IRQ's.

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You can't do this?

by seanferd In reply to Modem is locked down

Open Network Connections from My Network, or right-click the network tray icon.

Double-click or right-click your Local Area Connection, click Properties.

Make sure it is your aircard in the "Connect Using" box.

In "This connection uses the following items" box, scroll down if you need to do so, but check to see if "Microsoft TCP/IP version 6" is checked. Uncheck this and click OK all the way back out. Try your connection. If it does not work at all, you may need to re-enable it.

If you don't see IPv6 at all, this isn't the problem.

If you cannot do this, yeah, I guess they really have it locked down.

The only other things I can think of are interference-related, but it doesn't sound like that is the issue, as the hardware is "disconnecting". It shouldn't be a power problem, either, as the aircard needs to run off a regular USB port (not a powered hub) and operate off a battery-powered laptop.

I'll check on the card, but I'm stumped otherwise.

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I thought that something looked familiar

by Jacky Howe In reply to You can't do this?

http://techrepublic.com.com/5208-6230-0.html?forumID=101&threadID=303657&messageID=3029940

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Darah is not alone

by seanferd In reply to I thought that something ...

http://forums.wirelessadvisor.com/alltel-users/72224-pantech-um175al-disconnect.html

"Alltel gives crap answers."

I think Darah should get some cash back on (3?) aircards.

Odd- I was called away while editing my previous post, only to find a response from you (Jacky). I'd noticed that some days ago as well.

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Some other bits/ mfgr confusion

by seanferd In reply to I thought that something ...

http://windows7forums.com/windows-7-networking/2070-alltel-pantech-um175al-heres-how-i-made-work-windows-7-64bit.html

Maybe a similar procedure will help.

http://www.engadgetmobile.com/2006/09/27/pantech-utstarcom-ink-deal-for-cdma-phones/

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