Mino – The UC Guy

Microsoft Unified Communications Blog

Posts Tagged ‘Lync Server’

Step by Step Lync and Exchange UM Integration (by Jeff Schertz)

Posted by Mino on November 16, 2010



also in case you faced Integration problems , please check this URL


Posted in Lync Bugs, Lync Server 2010, Lync Telephony | Tagged: , , , | Leave a Comment »

Lync Server 2010 Media Traffic Network Usage

Posted by Mino on November 5, 2010

“This is RTM pre-release documentation information and subject to change in General Availability (GA) release by December 2010 , I will update this post if any changes are required ”

When planning for media bandwidth usage per scenario, use the following tables, which describe the average amount of bandwidth used per media type.

Audio/Video Capacity Planning, Peer-to-Peer Sessions


Audio/Video Capacity Planning, Conferences


Audio Capacity Planning, PSTN


The network bandwidth numbers in these tables represent one-way traffic only and take silence suppression into account.

When you calculate the actual bandwidth usage for a certain scenario, it is important to understand the actual media flows, which are as follows:

In a two-party scenario:

  • Users send audio streams only while they speak.
  • Both participants receive audio streams.
  • If video is used, both users send and receive video streams during the entire call.

In a Conferencing scenario (that is, a call with more than two participants):

  • Users send audio streams only while they speak.
  • All participants receive audio streams.
  • If video is used, only two participants upload a video stream at a time (that is, the active speaker and the previous active speaker
  • If video is used, all participants receive video streams.

Posted in Lync 2010 Client, Lync Server 2010 | Tagged: , , , , | 6 Comments »

Mike Stacy writes “ Side-by-side error when running DHCPUtil.exe with Lync Server 2010”

Posted by Mino on November 4, 2010


In trying to run DHCPUtil.exe from your Windows Server 2008 x64 DHCP server with the appropriate command line parameters in order to configure DHCP for Lync Server, you may run across the following error:

The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log or use the command-line sxstrace.exe tool for more detail.

Reviewing the app log reveals the following:

Log Name:      Application
Source:        SideBySide
Date:          11/4/2010 2:04:30 PM
Event ID:      33
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      host.uc.local
Activation context generation failed for "C:\Users\administrator.UC\Desktop\DHCPUtil.exe". Dependent Assembly Microsoft.VC90.CRT,processorArchitecture="amd64",publicKeyToken="1fc8b3b9a1e18e3b",type="win32",version="9.0.30729.4148" could not be found. Please use sxstrace.exe for detailed diagnosis.

Solution:  Install vcredist_x64.exe from the Lync Server media and run DHCPUtil.exe again.

Posted in Lync Bugs, Lync Phone, Lync Server 2010, Lync Telephony | Tagged: , , | 1 Comment »