User`s guide
Administrator’s Guide for Polycom HDX Systems
3–40 Polycom, Inc.
• Polycom HDX 8000 series
• Polycom HDX 4500
With the MPplus 4 option, the following systems can host SD multipoint calls
that include up to four sites:
• Polycom HDX 9001
• Polycom HDX 7000 HD systems
With the MPplus 4 option, the following systems can host up to four sites in a
SIF/CIF multipoint call:
• Polycom HDX 7000
• Polycom HDX 4000
The HDX system hosting the call transmits 720p and receives 640x368 while
the other endpoints transmit 640x368 and receive 720p. During this type of
four-way HD or SD multipoint call, all sites can be displayed in continuous
presence.
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.
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.