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Recording a conference on a Polycom MGC using an IP VCR

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Recording a conference on a Polycom MGC using the Cisco TelePresence IP VCR

You can use the IP VCR to record a conference on a Polycom MGC.

To do this you must configure certain settings on both the IP VCR and the Polycom MGC.

To configure the IP VCR:

  1. Go to Recordings > Folders.
  2. Click on Configuration next to the folder name you want to record into.
  3. Make a note of the Recording ID. If no ID has been assigned, enter one into the Recording ID field.
  4. Go to Settings > Recordings.
  5. Select Always send video to participants being recorded.
  6. Click Update folder.

See the online help topic associated with this page (Adding and updating folders) for detailed information about each field.

To configure the Polycom MGC:

  1. On the web interface of your MGC, go to MCU Configuration > Profiles.
  2. Either right-click Add new participant or go to Participants > Add a new participant. This opens in a new window.
  3. For Participant IP, enter the IP address of your IP VCR.
  4. For Alias Type, select Party Number.
  5. For Alias Name and Extension/Identifier String, enter the Recording ID (see above). Fill in the other fields as required.

Note: If you are using the same gatekeeper for the Polycom MGC and the IP VCR, then it should only be necessary to use the Recording ID.

Video problems when recording a conference with a content channel on a Polycom MGC

Occasionally video problems can be seen when recording a conferencing with a content channel from a Polycom MGC on the IP VCR. The content channel can sometimes appear blurry and/or flashing colored blocks can be seen.

The poor quality is because of an extension to H.263+ called Annex T that is used by Polycom products for transmitting content.

Endpoints can be prevented from using Annex T when transmitting content to an MGC running software versions 7.5.1 and later by adding an option to the MGC's system.cfg file.

To do this:

  1. From the Polycom MGC Manager, right-click on your MGC's name in the tree view and select MCU Utils and then Edit "system.cfg".
  2. Navigate to the PEOPLE PLUS CONTENT section and look for the ENABLE_H239_ANNEX_T item.
  3. If the item exists, set its value to NO; otherwise click Add item and add ENABLE_H239_ANNEX_T with a value of NO.
  4. Click OK to save the configuration file.
  5. Reboot the MGC for the changes to take effect.

This article applies to the following products:

  • Cisco TelePresence IP VCR 2200 / MSE VCR blade

June 22nd, 2011 TAA_KB_12