OCS VOIP call gets dropped when caller ID is blocked

  In an OCS VOIP deployment, call routing works fine. But it breaks down when the caller ID is blocked in certain circumstances.   I was working with one of the customers, everything was working just fine when caller ID was not blocked at the gateway end. When caller ID was blocked at the gateway…

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Maximum supported users for different topologies!

Following table talks about the supported number of connections in different topologies defined in the planning guide of OCS 2007. You can find the planning guide here… http://www.microsoft.com/downloads/details.aspx?familyid=723347c6-fa1f-44d8-a7fa-8974c3b596f4&displaylang=en     Topology Supported Performance Stand-alone Access Edge Server 15,000 client connections Stand-alone Web Conferencing Edge Server 3,000 client connections Stand-alone A/V Edge Server 1,500 concurrent audio/video…

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How does OCS select Exchange UM Server…

When any external or Internal user calls a user in OCS-UM enabled environement, The OCS Server selects the UM server for Voice mail facility. Following steps explain how does this happen – OCS will determine SIP Address of the dialed number It will check if the user is enabled for Unified Messaging. The attribute it…

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Commands to Prepare and Verify Schema, Forest and Domain

Just to make it available handy…  How to prepare schema for LCS\OCS LCScmd.exe /forest /action:Schemaprep How to verify if schema is prepared for LCS\OCS LCScmd.exe /forest /action:checkschemaprepstateHow to prepare the forest for LCS\OCS LCScmd.exe /forest /action:ForestPrep How to verify if the forest is prepared for LCS\OCS LCScmd.exe /forest /action:CheckForestPrepStateHow to prepare the domain for LCS\OCS…

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Normalization of phone number at the client end or server end?

  Normalization of the dialed number into E.164 format has been an interesting thing always! I am not going to explain the normalization rules here..  What we are going to discuss is the end point where Normalization rule does take place to translate the dialed number into E.164 format.. Each user is assigned a location Profile,…

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