This article relates to the Cisco TelePresence MCU 4203, Cisco TelePresence MCU MSE 8420, Cisco TelePresence MCU 4505 and Cisco TelePresence MCU MSE 8510 products.
Q. Under what conditions will a Codian MCU disconnect an IP session?
A. Other than when a 'normal' disconnection occurs (that is, when a participant chooses to disconnect), the MCU will only drop an endpoint from the conference when the TCP layer breaks down for some reason related to the network or the endpoint; for example, if an endpoint connected to a conference is suddenly powered down or its network cable is pulled out, or there is some other problem which means there is no network path between the endpoint and the MCU.
Note: the MCU describes dropping a call due to network problems as an H.245 network connection error.
The time between the start of the problem and the MCU removing the endpoint from the conference will be approximately 75 seconds.
The MCU will never terminate the IP connection in the case where there is no problem with the TCP connection between the endpoint and the MCU but for some reason the endpoint stops sending all UDP/RTP/RTCP packets etc. to the MCU.