Cisco 400-051 Exam

Which two statements about the restrictions for support of H.239 are true? (Choose two.)

  • A. SIP to H323 video calls using H.239 are not supported.
  • B. Redundancy for H.323 calls is not supported.
  • C. H.239 calls are not supported over intercluster trunks with Cisco Unified Communications Manager.
  • D. H.239 is not supported with third-party endpoints.
  • E. Cisco Unified Communications Manager supports a maximum of three video channels when using H.239.
Answer: Option A. B.
Explanation: 

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

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