status conference
Issue 4 May 2002
8-351555-233-123
Frame Alignment Word (FAW) Information. The FAW section of page 3
provides channel Frame Alignment Word information for the communication paths
labeled CHL 1 and 2. For 2B calls, both CHL 1 and 2 are used. For 1-channel
calls (112,bps, 128kbps, 168kbps, 196kbps, 224kbps, 256kbps, 280kbps,
320kbps, 336kbps, 384kbps, 768kbps, 1472kbps, 1536kbps, and 1920kbps) only
CHL 1 is used. A-OUT, A-IN, M-FRM, MFA, and MFN are flags with y or n.
Field descriptions
BCLS
Single and quad-screen presentation mode conferences.
“y” = The endpoint is watching the video of the broadcast
source.
RTLS
Single screen conferences.
“y” = The endpoint is watching the video of the return source.
HYPR
“y” = Endpoint hyperactivity (MCU isolates endpoints from the
MMCH conference due to “thrashing” behavior) affects the
endpoint’s status as a video source (for 5 seconds of
hyperactivity timer). The HYPR counter tallies the number of
times this endpoint is hyperactive.
DMUTE
“y” = The VC board or the software in the MCU mute the
decoder. VC boards mutes the decoder when it loses MMI or
endpoint framing, when it receives invalid audio code words,
and when endpoints are hyperactive. MCU software mutes the
endpoint decoder of all endpoints besides the broadcaster.
(when a mode of a conference is “broadcastw/scan”, broadcast
with auto scan) The DMUTE counter tallies the number of times
the VC board mutes this endpoint’s decoder.
VFMT
Quad-screen conferences. This field always defaults to n,
indicating QCIF format.
H.261
“y” = Video framing loss. The H.261 counter tallies the number
of times framing is lost.
A-OUT
MCU has endpoint framing.
A-IN
Endpoint has MCU framing
M-FRM
Multichannel frame alignment of both channels in 2B is present.
MFA
Multiframe alignment word is present (required in 2B call).
MFN
Multiframe numbering is present (required in 2B call).
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