Appendix 3: Capacity; Cascaded Conference Capacity - TANDBERG MCU User Manual

Appendix 3: Capacity

MCU Capacity - calculation
The total capacity in the MCU is defined by the following rules:
1) Software version defines maximum number of sites:
8+8 -> Maximum 8 video sites and maximum 8 telephones
16+16 -> Maximum 16 video sites and maximum 16 telephones
2) The total system bandwidth (ISDN/IP) is 7680 kbps (120x64kbps) regardless of software version.
3) In addition, each call has a weight depending on bandwidth/encryption:
Bandwidth Teleph.
Non-encr. 11
Encrypted N/A
The sum of the call weights cannot exceed 845. Users will be prevented from setting up calls that exceeds this limit.
Example:
If the MCU has made 6 calls at 768, 4 calls at 384, and 4 encrypted calls at 192 the calculation will be:
6x62 + 4x46 + 4x60 = 372 + 184 + 240 = 796. Since 796 is less than 845, this will be possible.
MCU Capacity – typical scenarios (16 video sites and 16 telephony calls option)
Below some typical capacity scenarios are listed. They can be derived by the calculation above:
Bandwidth
128 kbps
256 kbps
384 kbps
512 kbps
768 kbps
1472 kbps (1.5Mbps)
1920 kbps (2Mbps)
* 16+16 indicates 16 video sites and 16 telephones.
** Limited by the maximum capacity 7680 kbps, see 2) above.

Cascaded Conference Capacity

Up to seventeen MCUs (one master and up to sixteen slaves) can be cascaded together in one big conference, giving a
total number of 240 participants.
TANDBERG MCU
64 128 192 256
37 40 41 42
53 59 60 61
Non-encrypted
16 +16*
16+15
16+9
15+0**
10+0**
5+5
4+0**
320 384 512 768
44 46 54 62
68 73 84 111
Encrypted
14
13
11
10
7
N/A
N/A
63
Appendices
1152 1472 1920
80 88 110
N/A N/A N/A