Release Notes
New features in 3.1
Cisco TelePresence Server Software Release Notes 3.1(1.95) Page 12 of 31
The technique involves interleaving the original stream with additional, corrective packets, so that if media
packets are lost they can potentially be recovered by the recipient without resorting to retransmission of the
originals.
Applying FECconsumes additional bandwidth, so a call negotiated at a certain maximum bandwidth will use
less bandwidth for the media streams because it needs overhead for the FECpackets. The bandwidth
overhead can range from 0% - which means that FECpackets are not used - to 100% when every media
packet is protected by a FECpacket. A50% overhead means that one corrective packet is inserted to
protect every two media packets.
The TelePresence Server only starts using FECwhen it observes packet loss and then dynamically adjusts
the overhead based on the monitored packet loss.
Improved resource efficiency at 360p
Note:This feature is only available in the remotely managed mode of TelePresence Server operation. It is not
available in the locally managed mode.
This feature requires version XC2.2 of Cisco TelePresence Conductor.
The TelePresence Server now supports 360p30 video calls more efficiently than it did in previous releases.
The TelePresence Server now requires only an eighth of a screen license to support a 360p30 video call with
mono audio, where previously a call like this consumed a quarter of a screen license.
This optimization means that the Cisco TelePresence Server 8710, for example, can support up to 97 calls at
360p30 where previously the maximum was 48. See Platform licensing comparison [p.4] for more details.
Automatic Gain Control (AGC)
You can now apply automatic gain control (AGC) to conferences or to individual participants in advance so
that the gain is automatically controlled when participants have different audio levels.
AGC adjusts the participants' audio levels to a common reference level to ensure a consistent audio
experience for all participants.
A participant's AGC setting always overrides a setting inherited from the conference settings. Automatic gain
will be disabled for a connected participant when you manually change the gain.
Serviceability improvements
This release introduces several improvements to the serviceability of TelePresence Servers, as follows:
Protocols log
The protocols log now includes a capture filter, allowing you to capture only those protocols that are relevant
to your troubleshooting process.
You can select from the following protocols: BFCP, H.323 (where supported), SIP, and XCCP. H.323 is not
directly supported by TelePresence Server on Media 310/320 platforms.
The protocol capture options that you select will persist in the event of a device restart.
Media resources software resilience
A TelePresence Server's media resources are the processor chips that provide its audio and video
processing capabilities.The software that controls these processors has been improved in this release to