What is the difference between an IP MCU and an ISDN MCU in terms of mixing audio and video? I ask that because the bandwidth in an IP MCU is x times the number of endpoint (x=number of endpoints) and in the ISDN world it doesn´t happen. Is it a limitation of the IP codec ?
There are not many differences between IP and ISDN based MCUs except for the network interfaces. In fact many traditional ISDN based MCUs now have IP interfaces. The differences in audio/video mixing will vary depending on the MCU manufacturer. I think that the b/w multiple problem you are referring actually applies only to Continuous Presence calls. CP can be implemented either synchronously or asynchrnously. In an asyncronous fashion, the MCU builds a composite image (lets say four images) and sends out the aggregate video flow so you end up with 4x the bandwidth at egress when compared with ingress. In an asynchrnous implementation, the composite is constructed by terminating each video call in the MCU and mixing is done (usually on a piece of h/w in the MCU) so the egress and ingress flows mach 1:1. Generally speaking, s/w based MCUs use async and h/w MCUs use sync. In any case, both options are available when doing video over IP
Another point to take into account. In tradional H.320 MCUs video and audio features are given dedicated hardware resources that are not part of the actual network resource. Although some H.323 MCU have hardware and software resources, youe average enterprise class MCU will be primarily software driven. Many of the software MCUs are licenced on a per endpoint agreement. For instance you have a 10 seat license for an MCU...this means up to 10 endpoints can connect to the MCU at anytime.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...