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Media features such as Network Address and Port Translation (NAPT) processing and SRTP are supported for video streams as well. Policy controls are available to manipulate the Video Codec list (see Codec List Profile - CLI or Media - Codec List Profile (EMA ) for configuration details), SDP video "media line" related bandwidth attribute and packet marking for QoS of video streams. To allow video peering and conferencing flows, the

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can relay a set of SDP attributes at the audio "media level" (see sipTrunkGroup media SIP Trunk Group - Media - CLI or SIP Trunk Group - Media (EMA)) and session level (see sipTrunkGroup signaling SIP Trunk Group - Signaling - CLI or Sip Trunk Group - Signaling (EMA)).

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To see CLI global statistics examples audio vs. video configurations, see the "Command Examples" section of show status global Show Status Global page. 

Note
For a video call, SBC supports audio in pass-through mode only.

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• Usage of FECC in the context of H.323 is defined by Annex Q of ITU-T Rec. H.323 which details how H.281/H.224 messages are used and sent over an RTP/UDP/IP transport.
• RFC 4573 supports offer-answer when requesting a ``h224'' media type stream for use with H.281 over H.224 with SDP-based media negotiation making it possible to negotiate a H.224 session as described in H.323 Annex Q between a SIP client and an MCU in an interoperable way.

Video Codecs

Video Codecs SIP

The

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relays all video codecs by default using static or dynamic payloads.  

Video Codecs H.323

The

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supports the following codecs for H.323-H.323 video peering scenarios (i.e. H.323-H.323 calls with an audio and video stream).

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