User`s guide

Monitors and Cameras
Polycom, Inc. 3–39
With the MPplus 8 option, Polycom HDX 9004 systems can host multipoint
calls that include up to eight sites. The HDX system hosting the call transmits
720p and receives 432x240 while the other endpoints transmit 432x240 and
receive 720p. Polycom HDX 9004 systems can display all eight sites in
continuous presence, but only when the call is in HD. If for any reason the call
is not in HD, only four sites or fewer can be displayed. For HD continuous
presence, Polycom recommends setting Multipoint Mode to Discussion.
The following systems can participate in SD multipoint calls, but cannot host
HD or SD multipoint calls:
• Polycom HDX 9001
• Polycom HDX 7000
• Polycom HDX 4000
Polycom HDX 6000 systems can participate in multipoint calls, but cannot host
any type of multipoint call.
For more information about multipoint calls, refer to Configuring Multipoint
Viewing Modes on page 3-11 and Configuring Multipoint Calling on page 6-3.
Requirements for an HD multipoint call:
• The call must be hosted by a Polycom HDX 9002 or Polycom HDX 9004 system
running version 2.0 or later; a Polycom HDX 8000 series or Polycom HDX 4000
HD system running version 2.5 or later; a Polycom HDX 4500 system running
version 3.0.1 or later, a Polycom HDX 9006 system running 2.6 or later, or a
conferencing platform that supports HD such as Polycom RMX 1000 or
Polycom RMX 2000.
• The Polycom HDX system host must have the appropriate options installed.
• All systems in the call must support HD (720p at 30 fps) and H.264.
• The call rate must be high enough to support HD resolution, as shown in
Appendix C, Call Speeds and Resolutions.
• Transcoding must be disabled.
• The call cannot be cascaded.
• The call can only include up to six sites if AES Encryption is enabled. When AES
Encryption is enabled in calls with seven or eight sites, SIF/CIF video is sent.
Requirements for an SD multipoint call:
• The Polycom HDX system host must have the appropriate options installed.
• All sites in the call must support SD (30 fps) and H.264.
• Transcoding must be disabled.
• The call cannot be cascaded.