Thanks Matt for your prompt reply and helping on this.Actually iam trying to compare Microsoft OCS server and clients with other conferencing components for my knowledgebase in terms of important factors like ease of use to schedule meetings and features support etc.
I subscribed to your blog also and If you think you are familiar with any document or presentation that compares OCS and Cisco server/client components other than technet source will be very helpful.
Cheers
Raj