The call could not be completed because security levels do not match

The problem that I will talk about it here is that I couldn’t join a conf. or do any one to one conf. with any of my Tandberg video endpoints from OCS client.

The problem started after a security review we have done ourselves and we came up with several action to take to enhance our security internally, after the review OCS to CODIAN MCU communication got dropped.

The first problem stopped us from debugging it, last Thursday we solved the first problem so we started to debug this one, below are the symptoms of the issue:

• When you do a call from OCS client to Codian MCU the following error appears in the OCS client “The call could not be completed because security levels do not match".
• In the MCU OU will find the following error: Unable to provide video channel - possible bandwidth/codec issue.

Cause:

The cause was that OCS 2007 server has been configured to require encryption at the A/V conference, this causes the communication to drop, and configuring the module to support encryption fixes the problem.