Font Size: 14 18 24 30 / Hide Hotkeys

Test Report Polycom Real Presence Group 500

PDF Version (optimised for print)

Cisco SX 20General

Period

May / June 2013, additions in September 2016

SW Version

TC 4.0.2 - 40451

Device Class

The system is a set-top system and fit for groups of up to 10 people.

Scope of Delivery

The Real Presence Group 500 is delivered with codec, remote control and EagleEye Acoustic camera (alternatively EagleEye III camera with Polycom Real Presence Group Microphone Array) and all the necessary cables. Several other options (e.g. Polycom Touch Control or 1080p@60 for the first video channel) can be purchased additionally.

Protocols and Bandwidths

The system facilitates calls according to H.323 and SIP up to a bandwidth of 6 Mbps. It also supports the Telepresence Interoperability Protocol (TIP), which allows direct connections without gateway to non-standard based Telepresence systems from Cisco.

top of page

Installation

The installation is simple with the help of the documentation that is provided. Availability can be reached quickly.

ports

Up to two monitors/beamers can be connected solely via HDMI.

top of page

Test

Start / Wattage

After switching on the power, the system is ready for operation after about 2 minutes. From standby, it only takes about 3 seconds.

The typical wattage is about 78 kWh per year.

Operation

Polycom has provided the Real Presence series with a new user interface. It is easy to understand, but sometimes it takes a lot of keystrokes to reach the goal.

The removal of the key for the transmission of content from the remote control leads to an unusual overhead. It is now necessary to navigate through several menues to send the right channel.

Operation (Addition 09/2016)

In September 2016 a renewed test with the sofware version 5.1.2 was performed. With version 5 the user interface was redesigned again and has been adjusted to the look and feel of the mobile applications of Polycom. However, the settings page has not been changed visually.

Audio

Audio was good to very good in all connections. The microphones are integrated into the camera. Therefore, echo cancelling can be brought to its limits if parts of the device are arranged in an adverse manner or if the participants are very far away from the system. That is why there may be a little ambient noise, which never affected the understandability of the remote side in a negative way though. An improvement can be expected, if the EagleEye III or EagleEye IV camera with distinct microphones instead of the EagleEye Acoustic camera is used.

For the transmission, the codecs G.722, G.722.1C and the Siren LPR capability are used.

Video

Video was good to very good in all connections. With modern devices 1080@25 was sent, with older devices 720p@25. The Tandberg 6000 MXP was the only exception, where w576@12 was used for the transmission.

H.239

Static content (e.g. presentations) was always transmitted in very good quality in both directions.

When sending and receiving dynamic content in the data channel, the content could only be used practically with older remote sides when receiving SD videos on the part of the Real Presence Group 500. With HD content, the negotiated frame rate was much too low.

Similarly, when the Polycom device sent dynamic content in the data channel, older remote sides were not able to promptly generate a sensible image from the received data stream with up to 25 fps. With modern devices, there were no technical problems.

Detailed test results can be found in the compatibility matrix.

Camera Remote Control

Remote controlling the camera worked when the requirements were met in all the tests.

Service DFNVideoConference

Collaboration with the MCUs within the service DFNVideoConference worked without restrictions. Siren14 as well as H.264 were used with 720p@25 (sending direction) and 1080p@22 (receiving direction).

The collaboration according to H.239 was implemented with H.264 and 720p@7 in very high quality for presentations as well as SD and HD videos.

Gatekeepers

Collaboration with the gatekeepers GNU-GK and CISCO MCM worked without restrictions.

SIP

When calling the MCU within the service DFNVideoConference via SIP dialling with the syntax "Conference_ID@mcu.vc.dfn.de", there was a particularity: The calls were always aborted after exactly 1 minute and 40 seconds. During this time, a data presentation could be carried out in the second channel through BFCP. Several different settings of the system and of the DFN service did not provide a solution. The reason for the abortion could not be determined within the test period.

SIP calls to other systems worked faultlessly, also for longer time spans.

URI Dialling

Calls via URI dialling according to H.323 Annex O worked with the syntax "mcu.vc.dfn.de##Conference_ID" without restrictions.

Encryption and Firewall Traversal

All connections were encrypted with AES according to H.235.
The device supports firewall traversal according to H.460.18 and H.460.19.

Connection to Lync / Skype for Business (Addition 09/2016)

In September 2016 a renewed test with the sofware version 5.1.2 was performed. As part of this test the software option "Interoperability license for Skype for Business" was activated at the Polycom Group 500. With this option the system is capable to register at Lync / Skype for Business through a given account. For this purpose SIP has to be activated and the SIP registration has to be performed with "Microsoft" as "Registrar Server type". A simultaneous SIP registration to another SIP server is not possible in that case.

Within connections to Lync participants audio and video were each without complaints. The transmission of data presentations is only be carried out in the second channel if the opposite site (Lync participant) is sending it. The transmission of a data presentation from the Polycom Group 500 is done in the first channel (video channel), so that the self-image is not beeing send in this case.

top of page

Conclusion

The system Polycom Real Presence Group 500 can be recommended unconditionally for average group sizes. Audio and video do not show any deficiencies. In connections with older remote sides high-definition video films should be avoided for data presentations.

Documentation

We would like to thank the companies Polycom and MVC Mobile VideoCommunication GmbH for providing the tests.

Manufacturer: Polycom
Distributor: MVC Mobile VideoCommunication GmbH

Supported general standards H.323, SIP
Audio encodings G.711, G.722.1, G.722.1C, G.728, G.729A, Polycom Siren 22
Video compression H.261, H.263, H.264
Bandwidth Up to 6 Mbps
top of page