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Call Capacity
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ALL
APACITY
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BOUT
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230
ULTIPOINT
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RCHITECTURE
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BOUT
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ULTIPOINT
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OPOLOGIES
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ENTRALIZED
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OPOLOGY
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ASCADED
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ONFERENCES
6
LifeSize Multipoint 230 Installation Guide
The LifeSize Multipoint provides a flat capacity of 30 ports, regardless of the call
bit rate or resolution. Each video call consumes a single port.
High Definition calls can connect at up to 720p at 30fps.
Enhanced Definition calls can connect at up to 4CIF/352p at 30fps.
In some cases, the frame rate of calls using 4CIF might drop but not to less than
15fps.
The LifeSize Multipoint 230 enables both voice-only and video conference calls
for H.323, SIP, H.320 and regular PSTN network telephones. H.323 and SIP
devices can connect to a conference directly through the LifeSize Multipoint 230.
Other devices such as voice telephones and video conferencing terminals (H.320)
can connect to a conference via a gateway, such as the LifeSize Gateway.
The LifeSize Multipoint supports devices that can send and receive video
streams, as well as those that cannot send but only receive video streams. This
means that terminals without a video camera or video capturing capabilities can
participate in a conference as voice-only participants while benefiting from
seeing the other participants.
The LifeSize Multipoint 230 can work in a centralized or cascaded topology.
This section describes these two options.
Centralized Topology
"
Cascaded Conferences
"
In a centralized topology, the LifeSize Multipoint performs media processing for
all connected terminals, regardless of their location. The LifeSize Multipoint can
handle multiple conferences simultaneously.
The LifeSize Multipoint allows you to combine two or more conferences
resulting in a larger conference with many more participants. This is called
cascading. Cascading creates a distributed environment that helps reduce the
drain on network resources. In addition, the processing resources required by the
LifeSize Multipoint are distributed between participating MCUs. Costly
telephone or ISDN line usage can be further reduced with the mediation of a
gateway.
Cascading occurs when one conference with "x" number of participants invites
another conference with "y" number of participants. The two conferences
effectively become one large conference. The bandwidth required across a
cascaded conference link is only that of one audio/video stream between the two
on page 6
on page 6
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