TANDBERG 880 MXP - Manual (Page 160)

TANDBERG 770/880/990 MXP
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5.3.2 H.239
H.239 supports transmission of two video streams. It combines elements of Duo Video and
People+Content. If H.239 is disabled you will still be able to start TANDBERG Dual Video
Stream*
Enabled Enables H.239
Disabled Disables H.239
* The TANDBERG 550 MXP can only receive Dual Video Stream.