Restrictions for Support of H.239

AB.

Restriction for Support for H.239 The Support for H.239 feature has the following restrictions: -> Interworking SIP-H.323 Video calls using H.239 is not supported.

-> Redundancy for H.323 calls is not supported.

-> A fast-start request cannot include a request to open an H.239 additional video channel as it is not supported.

-> H.239 systems based on H.235 is not supported.

-> The SBC does not support call transfer for H.323 calls.

When an H.323 endpoint is placed on hold, it closes its media as well as video channels.

References: http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/sbcu/2_xe/sbcu_2_xe_book/sbc_h239.html.

H.239 is a video codec standard that allows multiple video streams to be transmitted over a single video call. It is used in video conferencing and collaboration systems to share multiple sources of video content simultaneously, such as presentations or whiteboards.

Here are the two true statements about the restrictions for support of H.239:

A. SIP to H323 video calls using H.239 are not supported: H.239 is a codec standard that is typically used in H.323-based video conferencing systems. While it is possible to use H.239 with SIP-based systems, there may be compatibility issues between different vendors' implementations. As a result, some systems may not support SIP to H323 video calls using H.239.

C. H.239 calls are not supported over intercluster trunks with Cisco Unified Communications Manager: Intercluster trunks allow multiple Cisco Unified Communications Manager clusters to be connected together for seamless communication. However, there may be limitations in the types of calls that can be made over intercluster trunks. In this case, H.239 calls may not be supported over these trunks, meaning that users in different clusters may not be able to share video content using H.239.

The other answer options are not true:

B. Redundancy for H.323 calls is not supported: H.239 is a codec standard and does not have anything to do with call redundancy, so this statement is not true.

D. H.239 is not supported with third-party endpoints: H.239 is a widely-used standard for video collaboration and is supported by many third-party endpoints, so this statement is not true.

E. Cisco Unified Communications Manager supports a maximum of three video channels when using H.239: Cisco Unified Communications Manager does not have a limit on the number of video channels that can be used with H.239, so this statement is not true.