Release Notes

Identifier Description
CSCuo72774 Symptom:
If a new trust store is uploaded to a TelePresence Server, it will not take effect until after a
system reboot. This means that certificates will continue to be checked and verified
against the old trust store and undesired connections may still be established.
Conditions:
This issue will be encountered any time the trust store is updated without a reboot.
Workaround:
Reboot the system to ensure the new trust store is used and that the correct set of CAs are
being used for certificate verification (if enabled).
CSCun21354 When calls on a SIP trunk between Cisco Unified Communications Manager and
TelePresence Server experience a glare condition, the calls may fail because Unified CM
does not respond properly to the SIP 491 message (Request Pending).
CSCun53448 A TelePresence Server may become inaccessible if the network port speeds are
specifically configured to 10 Mbit/s.
We recommend that you do not configure the Ethernet port speed to 10 Mbit/s.
CSCun62590 Attempting to clone a virtual machine that is running Cisco TelePresence Server on Virtual
Machine while it is powered on causes the virtual machine to stop responding. This type of
cloning is not currently supported and we recommend that you power off the virtual
machine before you clone it.
CSCun53487 When it starts up, Cisco TelePresence Server on Virtual Machine synchronizes its time
with the time of the ESX host. This behavior causes system logs to be unsynchronized
between the host and the TelePresence Server if you configure a different offset on
TelePresence Server. You can mitigate this issue by setting the TelePresence Server time
to the same time as that of the host; for example, by setting them both to UTC.
Limitations
Flow control disabled for endpoints that negotiate TIP/MUX
Endpoints that negotiate TIP/MUX, including the CTS series, would have been negatively impacted by the
new flow control algorithm introduced in TelePresence Server 4.0. Flow control requests have thus
deliberately been disabled for TelePresence Server 4.0 when it is in calls with these endpoints. This also
means that the Received video: flow control on video errors setting will have no effect if it is enabled for
these endpoints.
The TelePresence Server does not support sender-side flow control
The TelePresence Server does not currently support sender-side media flow control. This can create
problems when calls are made over low bandwidth pipes to endpoints that do not support receive-side flow
control. In such calls, flow control is not possible for the media from the TelePresence Server to the endpoint.
Issue identifier CSCun86953.
Video issues with earlier versions of TX endpoint software
Note: We strongly recommend that you use TX6.0.5 or later software on these endpoints when they
interoperate with TelePresence Server 3.1(1.95) or later.
Cisco TelePresence Server Software Release Notes (4.0(2.8)) Page 27 of 36
Limitations