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General UseTANDBERG Director Videoconferencing System
39
MultiSite
TF
(MCU)
The system has a built-in multipoint conference unit (MCU), MultiSite
TF
, which has the capability to
establish meetings with up to 4 video sites (5 if at least one site is a telephone call, ISDN/analogue/
mobile).
All video calls in a conference must be connected using the same bandwidth.
A conference can consist of any combination of ISDN/IP sites.
It is possible to have telephone meetings with up to 5 participants.
The MultiSite
TF
supports both Voice Switched and Continuous Presence mode (see ‘MCU Services’
in ‘Advanced Use’ for description of these modes).
Establishing a conference is done by first
making a call to one site. When a call is
established with the first site, the other
sites are connected one by one.
It is possible to either dial out to the sites
or the sites can dial in to the MultiSite
TF
.
Both ISDN, IP and mixed ISDN/IP
conferences can be encrypted if all
systems supports encryption.
For encrypted calls, there is a maximum
bandwidth of 768 Kbps for the whole
conference. This means that a 3-site
conference will have a maximum
bandwidth of 384Kbps per connection,
while a 4-site conference will have a
maximum bandwidth of 256 Kbps per
connection.
MULTISITE - WHICH QUALITY CAN BE USED ON EACH SITE?
4 SITES 4 SITES 3 SITES 3 SITES+ P-TO-P +
(2MBPS VERSION) +1 PHONE 1-2 PHONES 1-3 PHONES
BRI (768 KBPS) 256 KBPS 192 384 320 512
PRI-E1(1920 K) 512 512 768 768 1472
PRI-T1(1472 K) 384 384 512 512 1152
LAN (3MB) 768 768 * 1152 1152 * 1920 *
MIX ISDN/LAN EXAMPLE: IF 4 SITES ARE CONNECTED, TWO LAN SITES AND ONE ISDN SITE CAN BE CONNECTED ON 512 KBPS
(2MBPS VERSION) OR 256 KBPS (768 KBPS VERSION). NOTE - 4 SITES INDICATES YOURSELF + THREE OTHER SITES.
* - REQUIRES 1-3 ISDN CHANNELS AVAILABLE.
NOTE
WHEN MIXING ISDN AND LAN
SITES, THE TOTAL BANDWIDTH
LIMITATION
IS THE SAME AS FOR
THE ISDN BANDWIDTH.
TIP
SEE ‘UTILITIES’, ‘CONTINUOUS PRESENCE’ TO
CHANGE MODE.
TF - TANDBERG FIRST