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(834481) - Discusses how an Intel network adapter driver prevents two-way audio or video RTC communications. Provides a link to an updated driver.

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Microsoft Knowledge Base Article

This article contents is Microsoft Copyrighted material.
©2005-©2007 Microsoft Corporation. All rights reserved. Terms of Use | Trademarks
Article ID: 834481 - Last Review: February 3, 2004 - Revision: 1.1

Audio or video only works in one direction in a real-time communication session

View products that this article applies to.

SYMPTOMS

When users try to participate in a two-way real-time communication (RTC) session by using an RTC client program such as Windows Messenger or MSN Messenger, one party receives audio or video, but the other party does not. This issue occurs even when the RTC client programs, audio devices, and video devices are correctly configured on both computers. However, the users can successfully communicate with each other by using instant messaging.
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CAUSE

This issue may occur if one of the client computers has an Intel network adapter installed. This issue occurs because of a problem with version 7.0.26.0 of the E100b325.sys network adapter driver file. This version of the driver incorrectly marks outgoing real-time transport protocol (RTP) packets with 802.1p tags. Because the packets are marked with 802.1p tags, the receiving network adapter drops them, and audio or video communication is lost in one direction.
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RESOLUTION

To resolve this issue, install version 7.1.8.0 of the E100b325.sys network adapter driver file on the affected computer. To obtain this driver, visit the Microsoft Windows Update Web site:
http://www.windowsupdate.com (http://www.windowsupdate.com)
The E100b325.sys network adapter driver file is available in the Driver Updates section of this Web site. The name of the driver is "Intel network software update released on October 28, 2003."
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MORE INFORMATION

Session Initiation Protocol (SIP) clients use the RTP protocol to transfer audio and video data after an audio or video call has been established. RTP is specified in RFC 1889.

The issue that is described in this article is known to occur with network adapters including the Intel PRO/100 V and the Intel PRO/100 Management adapter. To verify the version of the installed network adapter driver, follow these steps.

Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.
  1. Click Start, and then click Control Panel.
  2. If Control Panel is in Category view, click Switch to Classic View.
  3. Double-click Network Connections, right-click Local Area Connection, and then click Properties.
  4. On the General tab, click Configure.
  5. Click the Driver tab, and then click Driver Details.
  6. In the Driver files box, view the network adapter driver file name and file version.
If the version of the E100b325.sys network adapter driver file is 7.0.26.0, you must update it.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
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APPLIES TO
  • Microsoft Office Live Communications Server 2003
  • Microsoft Windows Messenger 5.0
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Keywords: 
kbprb KB834481
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Anonymous User - Ron NOSPAM-AT-NOSPAM amtechcomp.com Reported as Irrelevant  
Written: 9/14/2004 6:53 PM
I am in the same boat. Intel web site for my board show Version 6.xxx Microsoft changed the Windowsupdate page format, don't know where they put this driver now.

Anonymous User Reported as Irrelevant  
Written: 9/23/2004 4:11 PM
I'm experiencing something even more weird then that. We have two offices and we rely on MSN Messenger 6.2 to communicate with each other. Sometimes audio is working just fine but most of the time, it is working only in one direction. Any suggestion ? I cannot find any web site (including forums) that talk about my problem. The question is why does it works sometimes ??? Scoobidoo where are you ?

andyp Reported as Irrelevant  
Written: 10/18/2004 2:29 PM
IBM have the required intel driver. http://www-1.ibm.com/support/docview.wss?rs=0&q1=intel+%28R%29+PRO2f10+VE&uid=psg1MIGR-54046&loc=en_US&cs=utf-8&cc=us&lang=en

Anonymous User Report As Irrelevant  
Written: 5/25/2005 5:04 AM
Here's what Microsoft Support has to say about locating the elusive KBKB834481-referenced Intel system driver file on May 25, 2005: _____________________________________________ "Dear Joe, I appreciate your patience on this issue. I have checked the Intel's website. Please refer to the following article: http://support.intel.com/support/network/sb/cs-006103.htm The latest driver version is 8.0.19.0. The driver for Windows XP can be downloaded from the following link: http://downloadfinder.intel.com/scripts-df-external/download.aspx?url=/4275/eng/PRO2KXP.exe&DwnldId=4275&ProductID=407&lang=eng Please install this driver to resolve this issue. Note: The third-party products discussed above are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products. Thank you for your cooperation. If anything is unclear, please don't hesitate to let me know and I will be glad to help. I look forward to hearing from you. Best Regards, Jerry Su v-30jesu@mssupport.microsoft.com Microsoft Windows Support Professional" / _________________________________________ Joe//

Thank U Joe Report As Irrelevant  
Written: 12/22/2005 1:30 AM
I have looked everywhere for this Intel driver, thank you so much.....

Joe Report As Irrelevant  
Written: 4/14/2006 9:23 AM
I am finding the most operative words in the knowledge article is "This issue may occur..." We have PC's that have the 7.0.26 Intel driver and they have no problems with two-way video communication. We also have the same model PC using the same 7.0.26 driver and they have the issue describe in the knowledge article. Sure enough update the driver and it problem solved. In addition, we have found some PCs with the 7.0.36 driver have this one-way video transmission problem...and some, same PC models, do not. Has anyone else experienced this intermittence? If so, were you able to target why it was happening for some but not others? Your advice is appreciated.

Andrea - sailsprite NOSPAM-AT-NOSPAM yahoo.com Report As Irrelevant  
Written: 5/6/2007 11:26 AM
HELP! in order to update Windows XP internet to wireless, need to download/install network driver for my Intel PRO/100 VE, specifically "e100b325.sys". Can anyone tell me where to find it?...



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